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Preparation of Alcohols from Grignard Reagents

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What are the factors affecting the half life period of first and zero order reaction?

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A \to B z e r o o r d e r r e a c t i o n

C \to D f i r s t o r d e r r e a c t i o n

If the first order reaction gets 75% completed in
40 minutes and zero order reaction gets 75%
completed in 30 minutes then calculate the value
of Z, where Z is ratio of half life of first order and zero order reaction

Q. What is half life period of a reaction? Calculate the half life period of a first order reaction?

Q. Half-life for the zero order reaction,

A (g) ⟶ B (g) + C (g)

and half-life for the first order reaction

X (g) ⟶ Y (g) + Z (g)

are equal. If completion time for the zero order reaction is

13.86

min, then calculate the rate constant (in

{h r}^{- 1})

for the reaction

X (g) ⟶ Y (g) + Z (g)

.

( If the answer is X, write 10X)

Q. Define pseudio first order reaction. Show that half life of zero order reaction is directly proportional to concentration of reactant.

Q. Arsine produces hydrogen gas on heating. The pressure of produced hydrogen was measured, at consant volume and temperature, as follows:

Time (hours)	0	5.5	6.5	8
Pressure (atm)	0.965	1.060	1.076	1.100

Calculate the specific rate and half-life peroid of reaction assuming the reaction to be of first-order.

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