In a zero-order reaction for every 10 °C rise of temperature, the rate is doubled.
If the temperature is increased from 10 °C to 100 °C, the rate of the reaction will become:
1. 256 times
2. 512 times
3. 64 times
4. 128 times
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe half-life of a certain enzyme catalysed reaction is 138 s, that follow the 1st order kinetics. The time required for the concentration of the substance to fall from 1.28 mg L–1 to 0.04 mg L–1, is:
1. 276 s
2. 414 s
3. 552 s
4. 690 s
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe reaction of hydrogen and iodine monochloride is given as:
H2(g) + 2ICl(g) → 2HCl(g) + I2(g)
This reaction is of first order with respect to H2(g) and ICl(g), for which of the following proposed mechanisms:
Mechanism A:
H2(g) + 2ICl(g) → 2HCl(g) + I2(g)
Mechanism B:
H2(g) + ICl(g) →HCl(g) + HI(g); slow
HI(g) + ICl(g) →HCl(g) + I2(g); fast
1. B Only
2. A and B both
3. Neither A nor B
4. A only
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn a first order reaction A \(\overset{ }{\rightarrow}\) B, if k is rate constant and initial concentration of the reactant A is 0.5 M then the half-life is :
(1) \(\frac{0 . 693}{0 . 5 k}\)
(2) \(\frac{log 2}{k}\)
(3) \(\frac{log 2}{k \sqrt{0 . 5}}\)
(4) \(\frac{ln 2}{k}\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf 60% of a first-order reaction was completed in 60 min, 50% of the same reaction would be completed in approximately:
(log 4 = 0.60, log 5 = 0.69)
1. | 50 min | 2. | 45 min |
3. | 60 min | 4. | 40 min |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology