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RRB JE CMA (Chemical and Metallurgical Assistant) 2025 Paper-2 (CBT2) Shift-1

URL: /engineering-exams-rrb-je-cma-chemical-and-metallurgical-assistant-2025-paper-2-shift-1 Tags: Engineering Exams RRB-JE CMA (Chemical and Metallurgical Assistant) 2025 Paper-2 Shift-1
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Questions

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Que. 1 : Which of the following options is NOT a greenhouse gas?
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Que. 2 : A car moving at a constant speed of 123 km/hr along a straight road is an example of ________.
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Que. 3 : An alloy is considered a homogeneous mixture because:
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Que. 4 : In January 2025, India launched the NVS-02 satellite to strengthen which of the following navigation systems?
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Que. 5 : Who among the following Indian female cricketers won the Best International Cricketer Award (Women) at the BCCI Naman Awards 2025?
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Que. 6 : Which of the following elements has an atomic number of 8?
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Que. 7 : What is the general orientation of the Himalayan ranges in the northwestern part of India?
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Que. 8 : Who among the following referred to the Directive Principles as the 'life-giving provisions' of the Constitution of India?
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Que. 9 : Who among the following established the Bengal Chemical Swadeshi Stores?
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Que. 10 : The main reason for which we are dependent on air is our _____.
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Que. 11 : A concave lens has a focal length of −2 cm. What is its power?
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Que. 12 : Where can one find the option to change a PowerPoint template?
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Que. 13 : Due to global warming, the temperature of the earth has increased by ________
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Que. 14 : What does LAN stand for?
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Que. 15 : What happens when you click on the 'Forward' button in an email?
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Que. 16 : Radiations that are emitted from nuclear wastes are known to cause ________ at a high rate.
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Que. 17 : Why do covalent compounds generally have low melting and boiling points?
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Que. 18 : For the protection and improvement of the environmental quality, the Environment Protection Act came into force in the year _________.
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Que. 19 : Which of the following bridges is constructed over the Brahmaputra River in India?
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Que. 20 : Which of the following is NOT a source of collection of municipal solid waste?
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Que. 21 : Who is known as the leader of the Green Revolution in India?
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Que. 22 : The atomic mass of sulphur is 32 u, and sulphur exists as S₈ molecules. What is the molecular mass of sulphur?
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Que. 23 : Which of the following will increase the heat produced by a heating element?
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Que. 24 : In an aquatic ecosystem, the phenomenon of biomagnification can best be studied in the case of _________.
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Que. 25 : Which country proposed the idea of holding a United Nations conference on human interactions with the environment in 1968?
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Que. 26 : A sound wave with a low frequency will have _______.
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Que. 27 : The kinetic energy of an object is derived using which of the following equations of motion?
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Que. 28 : Which formula should be entered in cell C2 to multiply the values of cells A2 and B2 in Excel?
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Que. 29 : Which German optical technology firm inaugurated its first Global Capability Centre in Bengaluru in November 2024, with plans to double its workforce within three years?
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Que. 30 : Which of the following was NOT an artisan guild during the Mauryan period?
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Que. 31 : Which type of RAM is faster and DOES NOT require refreshing?
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Que. 32 : Electricity production is categorised under which of the following economic sectors?
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Que. 33 : Which operating system is known for its open-source nature and community-driven development for desktops and laptops?
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Que. 34 : Which of the following MS Excel functions is used to convert a numeric value into a text with a specific format?
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Que. 35 : In which of the following events did Deepthi Jeevanji set a world record at the 2024 World Para Athletics Championships?
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Que. 36 : What is the primary function of a firewall tool in a computer network?
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Que. 37 : A ball of mass 50 grams is moving with a velocity of 15 m/s. What is its kinetic energy?
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Que. 38 : Which function key is used to move text or graphics in a document?
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Que. 39 : What is the primary function of a computer firewall?
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Que. 40 : Which of the following is NOT toxic to non-target organisms in the soil?
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Que. 41 : The power to issue an ordinance when Parliament is NOT in session is given to the President under which Article?
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Que. 42 : A solution is prepared by dissolving 40 g of NaCl in 200 g of water. What is the mass per cent of NaCl in the solution?
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Que. 43 : The wavelength of ultraviolet radiations which is most powerful and causes damage to the DNA is _____.
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Que. 44 : The people of ___________ were famously involved in execution of the Chipko movement.
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Que. 45 : An object is placed 15 cm in front of a convex lens of focal length 25 cm. The image distance will be ______.
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Que. 46 : What happens to the pH of pure water when a few drops of lemon juice are added?
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Que. 47 : Who among the following developed the notation system for Hindustani classical music?
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Que. 48 : The President has the power to dissolve which house of Parliament?
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Que. 49 : A metal wire is stretched, but it does not break easily. This property is known as:
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Que. 50 : Which of the following correctly differentiates mixtures and compounds?
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Que. 51 : Why are s-block elements highly reactive?
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Que. 52 : Which of the following is a fundamental unit?
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Que. 53 : What does the Lewis symbol for an element represent?
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Que. 54 : Three resistors of resistances 2, 4 and 8 ohms are connected in parallel. What is the equivalent resistance?
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Que. 55 : Which of the following is the correct unit of coefficient of thermal conductivity in terms of Watt (W), metre (m) and Kelvin (K)?
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Que. 56 : Which of the following correctly represents the relation between the number of free electrons ne and number of holes nh for an intrinsic semiconductors?
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Que. 57 : During electrolytic refining, which of the following occurs at the anode?
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Que. 58 : In the chemical reaction ZnO + C --> Zn + CO, ZnO is getting _____ and carbon is getting _____.
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Que. 59 : When a beam of 5.5 MeV α-particles emitted from a ²¹⁴Bi₈₃ radioactive source is allowed to fall on a thin foil of gold of thickness 2.1 × 10–7 m, then what percentage of an incident α-particles scatter by more than 1°.
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Que. 60 : Which of the following is a major cause of eutrophication in water bodies?
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Que. 61 : In longitudinal waves, which of the following options describes the direction of motion of the particles of the medium through which the wave is propagating?
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Que. 62 : Which natural indicator turns dark pink in an acidic solution and green in a basic solution?
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Que. 63 : A nucleus AXZ undergoes beta minus (β-) decay. What will happen to the atomic number of AXZ ?
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Que. 64 : Newton per coulomb is the SI unit of ___________.
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Que. 65 : Which of the following laws explains the relationship between the pressure and solubility of a gas in a liquid?
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Que. 66 : As per the Bohr's second postulate, the electrons can revolve around a nucleus in only those orbits for which the angular momentum is an integral multiple of ________.
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Que. 67 : A solution turns blue litmus paper red. What does this indicate about the ions present in the solution?
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Que. 68 : Which method is used to separate iron-rich minerals like magnetite from unwanted materials?
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Que. 69 : Which of the following statements is NOT true regarding infrared waves?
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Que. 70 : Identify whether the given statements are true or false. Statement-I: The word ‘stoichiometry’ is derived from two Greek words — stoicheion (meaning, element) and metron (meaning, measure). Statement-II: Stoichiometry, thus, deals with the calculation of masses (sometimes volumes also) of the reactants and the products involved in a chemical reaction.
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Que. 71 : Select the molecules where all bonds are single covalent bonds from the given list. O2, N2, CH4, CO2, NH3
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Que. 72 : What will be the energy gained by an electron when it has been accelerated by a potential difference of 1 volt?
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Que. 73 : Which of the following is a major source of pathogenic water pollution?
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Que. 74 : Which of the following reactions is used for the industrial preparation of sodium hydroxide?
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Que. 75 : Which of the following relations is correct for the actual frequency νo and the apparent frequency ν of a sound wave as observed by a stationary observer when the source of sound wave is moving towards the observer with velocity vS? Take the actual velocity of the sound wave in the medium as v.
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Que. 76 : Which of the following statements about washing soda (Na2CO3·10H2O) are correct? Statement 1: Washing soda is obtained from sodium hydroxide. Statement 2: It is used to remove permanent hardness of water. Statement 3: Washing soda is a hydrated salt.
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Que. 77 : Identify the INCORRECT pair from the following options.
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Que. 78 : A paper weight is kept on a tabletop. The mass of paper weight is 0.5 kg and its dimensions are 10 cm × 4 cm × 2 cm. Find the pressure exerted by the paper weight on the table top if it is made to lie on the table top with its sides of dimensions 10 cm × 2 cm. (Take g = 9.8 m/s2)
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Que. 79 : A body is projected with a velocity u⃗ = 3i + 4j with respect to ground. At the highest point of motion of the body, what will be the magnitude of the vertical component of the velocity.
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Que. 80 : Identify the correct option in which the heat required to warm a given substance does not depend.
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Que. 81 : What is the nature of the magnetic field at the centre of a current-carrying circular loop?
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Que. 82 : What will be the energy gained by an electron with charge q = 1.6×10–19 C, when accelerated through a potential difference (ΔV) = 1 volt?
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Que. 83 : Which of the following is the correct pair of a physical quantity and its SI unit?
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Que. 84 : The mass of a body is ‘X’ kg on the surface of the Earth. What will be the weight of this body (in newton) on the surface of the Earth? (Take the value of g on Earth as 10 m/s2)
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Que. 85 : The relation between displacement (X) of a particle and time (t) is given by the following equation: X = At + Bt². What will be the dimensions of A/B, if the equation is dimensionally correct?
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Que. 86 : Beyond the breakdown voltage, the current in a Zener diode _________.
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Que. 87 : What determines the shape of a molecule like CH4?
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Que. 88 : Which property is common to both mixtures and compounds?
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Que. 89 : Why is it difficult to determine the exact position and velocity of an electron simultaneously?
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Que. 90 : Which of the following is a real-life example of a neutralisation reaction?
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Que. 91 : Which of the following equations con-ectly represents the Ampere' s circuital law?
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Que. 92 : According to Planck’s quantum theory, energy is emitted or absorbed in:
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Que. 93 : Which of the following statement(s) is/are true regarding the boiling point of a liquid? (i) The temperature at which the liquid and the vapour states of the substance coexist is called its boiling point. (ii) The temperature at which the liquid and the solid states of the substance coexist is called its boiling point. (iii) The boiling point for water is 273 K.
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Que. 94 : What is the principal quantum number (n) of the ground state of a hydrogen atom?
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Que. 95 : For all angles of incidence greater than the critical angle, the wave will undergo what is known as total internal reflection. Which of the following is the correct formula for the critical angle?
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Que. 96 : Which of following statement(s) is/are true? i. A mixture contains particles of two or more pure substances, which may be present in it in any ratio. ii. Sugar solution and air are the examples of homogeneous mixtures. iii. Mixtures of salt and sugar, grains and pulses along with some dirt (often stones), are heterogeneous mixtures.
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Que. 97 : What is the ratio of the total energy of the second excited state to that of the third excited state in a hydrogen atom?
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Que. 98 : The corrosion of silver, copper and iron articles will produce _______, respectively.
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Que. 99 : A packet of potato chips contains nitrogen gas. Why is nitrogen gas used instead of oxygen?
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Que. 100 : Which of the following statements is INCORRECT regarding the structure of benzene?
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Que. 101 : Zinc is extracted from zinc sulphide (ZnS) by first converting it into zinc oxide (ZnO). This is done by:
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Que. 102 : A ______ pitch sound corresponds to more number of compressions and rarefactions passing a fixed point per unit time.
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Que. 103 : What is the correct name and function of the device represented by the given symbol?
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Que. 104 : The earth’s crust has only _____ carbon in the form of minerals (like carbonates, hydrogen carbonates, coal and petroleum).
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Que. 105 : Which of the following statements is/are true? i. In elements, in the free or the uncombined state, each atom bears an oxidation number of zero. ii. For ions composed of only one atom, the oxidation number is equal to the charge on the ion. iii. In all its compounds, fluorine has an oxidation number of −1. iv. The algebraic sum of the oxidation number of all the atoms in a compound must be zero.
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Que. 106 : What will be the conventional direction of electric current flowing through an electric circuit?
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Que. 107 : Which property of nylon makes it suitable for making ropes and fibres?
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Que. 108 : Identify whether the given statements are true or false. Statement-I: An H-bond in case of HF molecule, alcohol or water molecules is an intermolecular hydrogen bond. Statement-II: There is an intramolecular hydrogen bonding in an o-nitrophenol molecule.
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Que. 109 : Given below are two statements. Read the statements carefully and select the correct option. Statement I: Many metals, such as copper, zinc, tin, nickel, silver and gold, are refined electrolytically. Statement II: In Electrolytic Refining, the impure metal is made the anode and a thin strip of pure metal is made the cathode.
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Que. 110 : A car is moving in a straight line from city A to city B then city C. Let the distance between city A to B is 240 km and between city A and C is 320 km. The car moves from A to C in 6 hrs and back to B from C in 2 hrs. What will be the average velocity of the car?
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Que. 111 : What does the pattern formed by iron filings around a magnet demonstrate?
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Que. 112 : Which of the following equations correctly defines the input resistance of the common emitter junction transistor?
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Que. 113 : Which of the following properties are usually shown by metals? i. They have a lustre (shine). ii. They conduct heat and electricity. iii. They are malleable (can be hammered into thin sheets).
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Que. 114 : Rahul stirs a spoonful of salt into a glass of water. After a while, he notices that the salt is no longer visible. What type of mixture has he created?
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Que. 115 : Two isotopes, A and B, are present in a chlorine sample with 75% and 25% abundances, respectively. Their average atomic mass is 35.5 u, and the sum of their nucleons is 72. What are the number of nucleons in A and B, respectively?
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Que. 116 : The metals high up in the reactivity series are very reactive. These metals are obtained by _______.
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Que. 117 : 20 g of ice cubes at 0°C are put in 60 g of water in a tumbler. If the initial temperature of water is 40°C, then what will be the final temperature of water, assuming that no heat is lost to the surroundings? (Take: Latent heat of ice = 80 cal/g; Specific heat capacity of water = 1 cal/g°C)
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Que. 118 : Which of the following is a physical intensive property?
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Que. 119 : What happens to the impurities during the electrolytic refining of copper?
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Que. 120 : Which of the following is the simplest ketose?
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Que. 121 : In the chlor-alkali process, ________ is given off at the anode, and ________ at the cathode.
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Que. 122 : How does electronegativity generally vary in the periodic table?
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Que. 123 : When an electric current is passed through a metallic conductor, a nearby compass needle gets deflected. What is the reason for this deflection?
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Que. 124 : Which of the following metals does NOT occur in nature in a free state?
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Que. 125 : Which of the following statement(s) is/are true regarding the production and propagation of sound waves? (i) Sound is produced by vibrating objects. (ii) Sound waves do not require a material medium for their propagation. (iii) Sound waves fall in the category of non-mechanical waves.
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Que. 126 : Which of the following are physical properties? i. Melting point ii. Hardness iii. Density iv. Fluidity
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Que. 127 : The binding energy of a nucleus gives a _________ contribution to the mass of the nucleus.
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Que. 128 : Which of the following sets of quantum numbers (n, l, mₗ, mₛ) is NOT allowed for an electron in an atom?
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Que. 129 : Which of the following is/are the use(s) of washing soda? i. Sodium carbonate (washing soda) is used in glass, soap, and paper industries. ii. It is used in the manufacture of sodium compounds such as borax.
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Que. 130 : In which of the following materials is the energy gap (Eg) between the top of the valence band and bottom of the conduction band is between greater than 0.5 eV and less than 3 eV?
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Que. 131 : If a liquid of density ρ and coefficient of viscosity η flow with a velocity v through a pipe of diameter D, then the Reynold’s number is X. If the velocity of the liquid flowing through the pipe increases to 2v and the diameter of the pipe is reduced to D/4 (keeping all the other parameters the same), the new Reynold’s number is Y. What will be the value of X : Y?
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Que. 132 : Identify the INCORRECT pair from the given options.
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Que. 133 : The melting point of a substance at standard atmospheric pressure is called it's ______.
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Que. 134 : Why is metal refining important?
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Que. 135 : What happens to the pH when a strong acid reacts with a strong base?
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Que. 136 : If the pressure of an ideal gas is doubled and its volume is halved at constant temperature, what happens to the number of moles (n)?
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Que. 137 : Which of the following represents the correct electronic configuration of Chromium (Z = 24)?
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Que. 138 : Select the option that is correct regarding the following two statements labelled Assertion (A) and Reason (R). Assertion: The magnetic field lines do not form closed loops. Reason: Magnetic field lines can never intersect.
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Que. 139 : A potential difference (V) is applied for time (t) across the heating element of an electric geyser having a resistance (R). Which of the following is the correct relation between heat produced (H) in the geyser coil in terms of V, t, and R?
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Que. 140 : The mass number of a nucleus is X, while its atomic number is Y. What will be the number of neutrons and protons, respectively, in the nucleus?
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Que. 141 : Which of the following is NOT an example of forced convection?
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Que. 142 : Which of the following statements is/are true? i. The covalent bond may be classified into two types depending upon the types of overlapping: (i) Sigma(σ) bond and (ii) pi(π) bond ii. Basically, the strength of a bond depends upon the extent of overlapping. iii. In case of sigma bond, the overlapping of orbitals takes place to a larger extent. Hence, it is stronger compared to the pi bond where the extent of overlapping occurs to a smaller extent.
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Que. 143 : Why was DDT widely used after World War II?
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Que. 144 : A medium has an absolute refractive index of √3. What will be the polarising angle for this medium?
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Que. 145 : What did Rutherford’s experiment prove about the structure of the atom?
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Que. 146 : What does BJT stand for?
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Que. 147 : Which of the following statements is true about the reactivity series of metals?
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Que. 148 : Identify the INCORRECT pair from the given options.
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Que. 149 : On heating gypsum at 373 K, it loses water molecules and becomes _________, called Plaster of Paris.
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Que. 150 : Given below are two statements. Read the statements carefully and select the correct option. Statement I: p-Block Elements comprise those belonging to Group 13 to 18 of the modern periodic table. Statement II: p-Block Elements, together with the s-Block Elements, are called the Representative Elements or Main Group Elements.
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