The conversion of a reactant, undergoing a first order reaction, at a time equal to three times the half life of the reaction is

Half-life period for a first order reaction is __________ the initial concentration of the reactant.

A

Directly proportional to

B

Inversely proportional to

C

Independent of

D

None of these

If the time required to change the concentration of reactant to half its original value is independent of the initial concentration, the order of reaction is

A

Zero

B

One

C

Two

D

Three

A man sells chocolates which are in the boxes. Only either full box or half a box of chocolates can be purchased from him. A customer comes and buys half the number of boxes which the seller had plus half box more. A second customer comes and purchases half the remaining number of boxes plus half a box. After this the seller is left with no chocolate boxes. How many chocolate boxes the seller had initially?

A

2

B

3

C

4

D

3.5

E

None of these

If n = overall order of a chemical reaction. a = initial concentration of reactant. t = time required to complete a definite fraction of the reaction. Then pick out the correct relationship.

A

$${\text{t}} \propto \frac{1}{{{{\text{a}}^{\text{n}}}}}$$

B

$${\text{t}} \propto \frac{1}{{{{\text{a}}^{{\text{n}} - 1}}}}$$

C

$${\text{t}} \propto \frac{1}{{{{\text{a}}^{{\text{n}} + 1}}}}$$

D

$${\text{t}} \propto {{\text{a}}^{\text{n}}}$$

For a first order chemical reaction, the concentration of the reactant decreases __________ with time.

A

Linearly

B

Exponentially

C

Logarithmically

D

Inversely

A chemical reaction is of zero order, when the reaction rate is (where, CA = concentration of reactant)

A

$$ \propto {\text{CA}}$$

B

$$ \propto \frac{1}{{{\text{CA}}}}$$

C

Independent of temperature

D

None of these

Some money is divided amongst three workers A ,B and C such that 5 times A's share is equal to 12 times B's share which is equal to 6 times C's share. The ratio between the shares of A ,B and C is?

A

5 : 10 :12

B

10 : 12 : 5

C

12 : 5 : 10

D

5 : 12 : 10

Father is aged three times more than his son Ronit. After 8 years, he would be tow and a half times of Ronit's age. After further 8 years, how many times would he be of Ronit's age

A

2 times

B

2.5 times

C

3.5 times

D

4 times

What is the order of a chemical reaction in which doubling the initial concentration of the reactants doubles the half life time of the reaction?

A

0

B

1

C

2

D

3

Rahim has invited his three buddies over to watch the basketball game on his wide-screen television. They are all hungry, but no one wants to leave to get food. Just as they are arguing about who should make the food run, a commercial comes on for a local pizzeria that delivers. The phone number flashes on the screen briefly and they all try to remember it. By the time Zachary grabs a pen and paper, each of them recollects a different number.i. All of the men agree that the first three numbers are 995.ii. Three of them agree that the fourth number is 9.iii. Three agree that the fifth number is 2.iv. Three agree that the sixth number is 6; three others agree that the seventh number is also 6.Which of the numbers is most likely the telephone number of the pizzeria?

A

995-9266

B

995-9336

C

995-9268

D

995-8266

The conversion of a reactant, undergoing a first order reaction, at a time equal to three times the half life of the reaction is

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