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RRB JE CMA (Chemical and Metallurgical Assistant) 2025 Paper-2 (CBT2) Shift-2

URL: /engineering-exams-rrb-je-cma-chemical-and-metallurgical-assistant-2025-paper-2-shift-2 Tags: Engineering Exams RRB-JE CMA (Chemical and Metallurgical Assistant) 2025 Paper-2 Shift-2
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Questions

150 Questions
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Que. 1 : If the absolute refractive index of a medium is less than 1, it means ________.
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Que. 2 : The Millennium Development Goals (MDGs) aimed to reduce extreme poverty by which year?
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Que. 3 : Which of the following is NOT toxic to non-target organisms in the soil?
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Que. 4 : What is the net force acting on an object if balanced forces are applied?
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Que. 5 : If an object is dropped from rest, what will be its velocity after 15 seconds? (g = 9.8 m/s²)
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Que. 6 : Which of the following states is NOT covered under the Atal Bhujal Yojana?
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Que. 7 : In which of the following regions the Himalayas has the greatest width?
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Que. 8 : Who among the following inaugurated the 38th National Games held in Dehradun in January 2025?
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Que. 9 : Which of the following is NOT a component of a CPU?
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Que. 10 : Which of the following is NOT a source of release of smokestacks?
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Que. 11 : Which Article provides Ministers the right to participate in parliamentary proceedings but without voting rights?
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Que. 12 : Which of the following correctly explains why clothes dry faster on a windy day?
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Que. 13 : What is the primary purpose of using a firewall on a Personal Computer?
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Que. 14 : Which of the following correctly represents the chemical formula of a compound formed by aluminium and sulphate ions?
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Que. 15 : According to the Tendulkar methodology, what was the estimated percentage of people below the poverty line in rural areas in 2011-12?
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Que. 16 : Inertia depends on which property of an object?
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Que. 17 : What happens when an acid reacts with a metal oxide?
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Que. 18 : Which official in the Gupta administration was responsible for peace and war matters?
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Que. 19 : Which defect of vision occurs due to the weakening of ciliary muscles with age?
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Que. 20 : What is the purpose of the Collation option in the Print settings?
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Que. 21 : What is the first step to securing ones smartphone or tablet?
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Que. 22 : Which of the following is a characteristic difference between colloids and true solutions?
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Que. 23 : What happens when a computer is put into Sleep mode?
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Que. 24 : The primary agent that helps in the decomposition of biodegradable matter in domestic sewage is __________.
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Que. 25 : The Industrial Policy Resolution of 1956 categorised industries into how many groups?
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Que. 26 : What was the main objective of the Extremists during the Indian National Movement?
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Que. 27 : Which of the following companies announced plans in February 2025 to construct the world's longest undersea cable, aiming to enhance internet connectivity across five continents, with landing points in India?
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Que. 28 : The main use of chlorofluorocarbons is in __________.
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Que. 29 : What is the approximate pH of a neutral salt solution?
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Que. 30 : In an electric circuit, what is the correct way to connect an ammeter?
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Que. 31 : The fine powder that is obtained from the modified and recycled form of plastic is called _______.
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Que. 32 : The energy that is derived from the use of radioactive isotopes is termed as _________.
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Que. 33 : What is the primary function of the F4 key in MS Excel when editing a cell reference in a formula?
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Que. 34 : Which of the following cities hosted the inaugural Kho Kho World Cup in January 2025?
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Que. 35 : Which of the following is the correct way to insert a new column in a spreadsheet?
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Que. 36 : The maximum sound is generated _________.
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Que. 37 : If you want the primary recipient to see that others have received a copy of an email, you should enter their email addresses in the ______ field.
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Que. 38 : The glass panel used in greenhouses is known to retain ________.
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Que. 39 : The practice of Jhum cultivation is prevalent in the __________.
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Que. 40 : What is the shortcut key to start a slideshow from the beginning?
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Que. 41 : The Rudra Veena is predominantly associated with which genre of Hindustani music?
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Que. 42 : Which state of matter shows the highest expansion when temperature is increased?
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Que. 43 : Dr. BR Ambedkar described which part of the Indian Constitution as its ‘novel features', while Granville Austin referred to it as the ‘Conscience of the Constitution’?
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Que. 44 : Which of the following CANNOT be considered as a measure to control global warming?
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Que. 45 : What is India's global military ranking in the 2025 Global Firepower (GFP) index?
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Que. 46 : Identify the correct formula for the compound formed between Mg²⁺ and PO₄³⁻ ions.
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Que. 47 : What does PCB stand for?
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Que. 48 : Why does a bee sting cause pain and irritation?
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Que. 49 : What is the maximum number of Ministers allowed in the Council of Ministers, including the Prime Minister, as per the 91st Amendment Act?
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Que. 50 : The phenomenon of multiple echoes due to repeated reflections is called ___________.
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Que. 51 : A neutralisation reaction occurs when ______ react with each other.
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Que. 52 : Read the given two statements and select the correct option. Statement-I: At constant volume, pressure of a fixed amount of gas varies directly with the temperature. Statement-II: Each line of pressure vs temperature (Kelvin) graph at constant molar volume is called isochore.
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Que. 53 : Which of the following statement(s) is/are true? i. The study of emission or absorption spectra is referred to as spectroscopy. ii. The spectrum of radiation emitted by a substance that has absorbed energy is called an emission spectrum. iii. The element helium (He) was discovered in the sun by a spectroscopic method.
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Que. 54 : Which of the following correctly describes the trend of ionic radius across a period?
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Que. 55 : In the reaction, 2Cu + O2 → 2CuO, which substance is oxidised?
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Que. 56 : Which of the following green chemistry strategies is used to minimise solvent waste?
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Que. 57 : Which of the following statements is NOT correct in reference to the melting point?
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Que. 58 : Which of the following is the correct definition of the electric potential due to a positive charge Q at a point r from it?
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Que. 59 : Given below are two statements. Read the statements carefully and select the correct option. Statement I: Properties of a compound are different from those of its constituent elements, whereas a mixture shows the properties of its constituting elements or compounds. Statement II: The constituents of a mixture can be separated fairly easily by physical methods, whereas the constituents of a compound can be separated only by chemical or electrochemical reactions.
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Que. 60 : The phenomenon of perfect diamagnetism in superconductors is known as:
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Que. 61 : The voltmeter is always connected ______ across the points between which the potential difference is to be measured.
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Que. 62 : Consider that a nucleus with A = 240 is breaking into two fragments each of A = 120. What will be the total gain in binding energy, if binding energy per nucleon (Ebn) for A = 240 nucleus is about 7.6 MeV and for the two A = 120 fragment nuclei is about 8.5 MeV?
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Que. 63 : In which of the following mediums is the speed of sound maximum at 25°C?
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Que. 64 : Given below are two statements. Read the statements carefully and select the correct option. Statement I: A reaction in which a single product is formed from two or more reactants is known as a combination reaction. Statement II: Calcium oxide reacts vigorously with water to produce slaked lime (calcium hydroxide); this is a combination reaction.
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Que. 65 : According to Henry’s law, the solubility of a gas in a liquid is directly proportional to which factor?
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Que. 66 : In Young’s double-slit experiment (using two coherent sources of the same intensity), the resultant intensity at a point on the screen is X, when the path difference is λ/3 (λ being the wavelength of light used). What will be the ratio of X and Y, where Y is the maximum resultant intensity?
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Que. 67 : Why does hydrogen fluoride (HF) form stronger hydrogen bonds than water (H₂O) even though water has more hydrogen bonding sites?
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Que. 68 : What does the principal quantum number (n) determine?
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Que. 69 : The formation of magnesium oxide (MgO) from magnesium and oxygen is a/an _____ reaction.
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Que. 70 : The products of the reaction between ethanoic acid and carbonates and hydrogen carbonates are:
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Que. 71 : An alternating current source is applied across a full-wave rectifier. Which of the following will be true regarding the output obtained?
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Que. 72 : Which of the following is/are used as olfactory indicators? i. Vanilla ii. Onion iii. Clove
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Que. 73 : Which of the following ions is present in washing soda?
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Que. 74 : If the height of the image is 2 times the height of the object, then the linear magnification is _______.
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Que. 75 : Which of the following monomers is used in the production of polythene?
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Que. 76 : What will be the shape of the magnetic field lines inside a current carrying solenoid?
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Que. 77 : The radioactive decay constant (in the law of radioactive decay) is also called ______.
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Que. 78 : Which of the following SI units is INCORRECTLY matched with its physical quantity?
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Que. 79 : Which of the following is the correct relation between the coefficient of linear expansion (αL) and the coefficient of volumetric expansion (αV)?
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Que. 80 : Which of the following environmental benefits is associated with using ethanol as a fuel?
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Que. 81 : What is/are collected as anode mud during electrolytic refining?
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Que. 82 : Which of the following everyday activities is a chemical change?
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Que. 83 : A student mixed lead(II) nitrate solution with potassium iodide solution. What was observed?
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Que. 84 : A car moves along a circular track of radius 50 m with a speed of 10 m/s. What is its centripetal acceleration?
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Que. 85 : Which of the following statements is true for a solenoid?
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Que. 86 : If the pressure of a gas is doubled while keeping the temperature constant, what happens to its volume?
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Que. 87 : Which of the following options is INCORRECT in reference to a ferromagnetic substance?
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Que. 88 : Consider the two vectors, vector A of magnitude 4 units and vector B of magnitude 5 units. If the angle between the two vectors is 60°, then find the scalar product of vector A and vector B.
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Que. 89 : Given below are two statements. Read the statements carefully and select the correct option. Statement I: All bases do not dissolve in water. Statement II: Bases that are soluble in water are called alkalis.
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Que. 90 : Some solute particles in a solution collide with the solid solute particles and get separated out of the solution. This process is known as _____.
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Que. 91 : Which of the following statements is/are true? i. Polyesters are the polycondensation products of dicarboxylic acids and diols. ii. Dacron or terylene is the best known example of polyesters. iii. Dacron fibre (terylene) is crease resistant and is used in blending with cotton and wool fibres and also as glass reinforcing materials in safety helmets, etc.
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Que. 92 : The two characteristic features seen in carbon, that is, _______ and _______, when put together, give rise to a large number of compounds.
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Que. 93 : In the reactivity series, which of the following metals can displace zinc from the zinc sulphate solution?
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Que. 94 : An iron nail is placed in a solution of copper sulphate. Which of the following changes will NOT occur?
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Que. 95 : Compared to non-metals, which of the following is true about coefficient of linear expansion (αl) of metals?
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Que. 96 : What type of error is introduced when an observer consistently reads a scale from an angle instead of directly in front?
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Que. 97 : At which of the following temperatures, will water have the maximum density?
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Que. 98 : Considering the bond lengths of N₂ and O₂, which statement is correct?
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Que. 99 : When an acid dissolves in water, hydrogen ions (H+) are released. What happens to them?
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Que. 100 : Which of the following statements is/are correct regarding the position of metals in the activity series based on their natural occurrence? Statement I: Moderately reactive metals are commonly found as oxides, sulphides or carbonates in nature. Statement II: The metals at the top of the activity series are found in nature as free state.
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Que. 101 : Which of the following instruments is used to determine the purity of milk based on Archimedes' principle?
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Que. 102 : Which of the following internal macroscopic states of the body changes when a bullet is fired from a gun?
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Que. 103 : The oxides of _____ and _____ metals can be reduced to metals by heating alone in air.
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Que. 104 : Which of the following are the correct conditions required for total internal reflection to take place? (i) The light should be travelling from an optically rarer to an optically denser medium. (ii) The light should be travelling from an optically denser to an optically rarer medium. (iii) The angle of incidence should be less than the critical angle for a given pair of media. (iv) The angle of incidence should be greater than the critical angle for a given pair of media.
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Que. 105 : Identify whether the given statements are true or false. Statement-I: Henry was the first to give a quantitative relation between the pressure and solubility of a gas in a solvent, which is known as Henry’s law. Statement-II: At a constant temperature, the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas present above the surface of a liquid or solution.
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Que. 106 : A Gaussian spherical surface of radius R enclosing a charge Q, has an outward flux ϕ associated with it. What will be the new outward flux associated with the Gaussian spherical surface, if the radius of the Gaussian surface is doubled?
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Que. 107 : What does a higher value of thermal conductivity of a material signify?
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Que. 108 : Which of the following statements is/are FALSE regarding the characteristics of sound waves? (i) A loud sound wave has a lower amplitude compared to a soft sound wave. (ii) A loud sound wave has a greater amplitude compared to a soft sound wave. (iii) The frequency of a high-pitched sound is greater than that of a low-pitched sound. (iv) The frequency of a high-pitched sound is lower than that of a low-pitched sound.
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Que. 109 : Select the option that is correct regarding the following two statements labelled Assertion (A) and Reason (R). Assertion: In insulators, the energy gap between the valence band and conduction band is less than 3 eV. Reason: The valence electrons in an insulator are very loosely bound to the nucleus.
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Que. 110 : What is the significance of the Bohr radius in the Bohr model of the atom?
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Que. 111 : Why is fullerene considered a unique allotrope of carbon?
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Que. 112 : Identify whether the given statements are true or false. Statement-I: When two or more compounds differ in the position of substituent atom or functional group on the carbon skeleton, they are called position isomers. Statement-II: Propan-1-ol and Propan-2-ol are examples of position isomers.
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Que. 113 : Given below are two statements. Read the statements carefully and select the correct option. Statement I: Green chemistry is a way of thinking and is about utilising the existing knowledge and principles of chemistry and other sciences to reduce adverse impact on environment. Statement II: Green chemistry is a production process that would bring about minimum pollution or deterioration of the environment.
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Que. 114 : Which of the following is NOT true according to Rutherford’s atomic model?
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Que. 115 : How does the magnetic field inside a current-carrying solenoid behave?
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Que. 116 : Which of the following statements is/are true? i. Kössel and Lewis in 1916 developed an important theory of chemical combination between atoms known as the electronic theory of chemical bonding. ii. According to the electronic theory, atoms can combine either by transfer of valence electrons from one atom to another (gaining or losing) or by sharing of valence electrons in order to have an octet in their valence shells.
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Que. 117 : Which of the following reactions is an example of a combination reaction?
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Que. 118 : The processes used for removing the gangue from the ore are based on the differences between the _______ or _______ properties of the gangue and the ore.
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Que. 119 : The present accepted value of the electrical charge on an electron is ________ × 10–19 C.
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Que. 120 : Arrange the following metals according to the order of increasing reactivity. Ca, Zn, Cu, Au
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Que. 121 : Which of the following gives the correct decreasing order of atomic radii of the given elements of second period?
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Que. 122 : Considering significant figures, what will be the correctly rounded result of 21.16 + 5.5?
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Que. 123 : Which of the following is NOT refined electrolytically?
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Que. 124 : Which of the following is the unit of work function (φo) in photoelectric emission?
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Que. 125 : Which of the following pairs is INCORRECT?
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Que. 126 : What is the symbol of a wire crossing without joining in a circuit?
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Que. 127 : Which gas is released when ethanol is oxidised to ethanoic acid using an oxidising agent?
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Que. 128 : Which method is commonly used to extract copper from copper sulphide (Cu2S)?
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Que. 129 : Given below are two statements. Read the statements carefully and select the correct option. Statement I: Bohr’s model could account for the stability and line spectra of hydrogen atom and hydrogen like ions (for example, He⁺, Li²⁺, Be³⁺ and so on). Statement II: Bohr’s model could not explain the ability of atoms to form molecules by chemical bonds.
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Que. 130 : Calculate the time taken by a sound wave of frequency 1 kHz and wavelength of 40 cm to travel a distance of 4 km.
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Que. 131 : Which of the following is the correct relation between electric power (P) of an appliance, electrical energy consumed (E ) by the appliance and time (t) for which the appliance is used ?
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Que. 132 : For an insulator at room temperature, the conduction band is __________.
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Que. 133 : The energy of an electron in a multielectron atom depends on which of the following? i. Its principal quantum number (shell) ii. Its azimuthal quantum number (subshell)
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Que. 134 : If a nucleon has p number of neighbours within the range of nuclear force, then the binding energy is ____________.
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Que. 135 : Which of the following elements is a solid at room temperature and pressure?
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Que. 136 : Which device is used to get a constant DC voltage from the DC unregulated output of a rectifier?
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Que. 137 : The Doppler effect is a phenomenon associated with which of the following?
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Que. 138 : Which of the following relationship holds in regards to energy gap in Conductor (EgC), insulator (Egi) and semiconductor (EgS)?
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Que. 139 : Which of the following correctly describes the trend of ionic radius across a period?
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Que. 140 : An electric lamp of resistance 20 Ω, and a conductor of 4 Ω resistance are connected in series in an electric circuit. What will be the resultant resistance of the circuit?
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Que. 141 : The gravitational force between two bodies of the same mass placed at a distance ‘d’ apart is 'X'. If the mass of both bodies is doubled, and the distance between them is reduced to d/4, what will be the new gravitational force in terms of X?
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Que. 142 : Temperature is considered as a/an ___________ variable while specifying the state of a gas in thermodynamics.
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Que. 143 : Charles' Law states that for a fixed mass of gas at constant pressure, the volume of a gas is:
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Que. 144 : During the electrolytic refining of copper, which of the following observations is correct?
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Que. 145 : Why did Bohr’s model fail for multi-electron atoms?
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Que. 146 : Which of the following is NOT a unit used to measure the binding energy of a nucleus?
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Que. 147 : Mixing an acid or base with water results in decrease in the concentration of ions (H3O+/OH–) per unit volume. Such a process is called ______.
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Que. 148 : What is the main function of the ozone in the stratosphere?
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Que. 149 : Applying a layer of paint on an iron surface helps prevent corrosion primarily by:
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Que. 150 : Which of the following is equivalent to the energy of 1.602 × 10−20 J?
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