Which of the following reactions represents the combustion of methane?
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A.
CH₄ + O₂ → CO₂ + 2H₂O
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B.
CH₄ + H₂O → CO + H₂
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C.
CH₄ + Cl₂ → CH₃Cl + HCl
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D.
CH₄ + O₂ → CO + H₂O
Correct Answer:
A. CH₄ + O₂ → CO₂ + 2H₂O
Explanation:
The pattern follows a consistent shift for each letter based on the English alphabet: - The first letter shifts back by 4 positions: Q - 4 = M
- The second letter shifts forward by 4 positions: I + 4 = M
- The third letter shifts back by 4 positions: R - 4 = N
- The fourth letter shifts forward by 4 positions: K + 4 = OWait, applying the specific logic from the examples:
S (19) to O (15) is -4
K (11) to G (7) is -4
I (9) to N (14) is +5
B (2) to G (7) is +5
Testing CUCV to YQHA:
C (3) to Y (25) is -4
U (21) to Q (17) is -4
C (3) to H (8) is +5
V (22) to A (1) is +5
Applying -4, -4, +5, +5 to QIRK:
Q (17) - 4 = M (13)
I (9) - 4 = E (5)
R (18) + 5 = W (23)
K (11) + 5 = P (16)
The resulting code is MEWP.
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