NEET Chemistry: Questions 524 - 530 of 677

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Question number: 524

» States of Matter » Solid State » Ionic

MCQ▾

Question

How many chloride ions are there around sodium ion in sodium chloride crystal?

Choices

Choice (4) Response
a.

3

b.

8

c.

4

d.

6

Question number: 525

» States of Matter » Solid State » Voids

MCQ▾

Question

Which of the following crystal has the Antifluorite structure?

Choices

Choice (4) Response
a.

Na2O

b.

HgS

c.

AgCl

d.

AgI

Question number: 526

» Chemical Kinetics » Collision Theory of Bimolecular Gaseous Reactions

MCQ▾

Question

According to Arrhenius theory, the rate is directly proportional to the number of effective collisions ,R=Z×f , here Z is?

Choices

Choice (4) Response
a.

Collision fraction

b.

Collision frequency

c.

Collision coefficient

d. None of the above

Question number: 527

» Chemical Kinetics » Differential and Integral Forms of Zero and First Order Reactions

MCQ▾

Question

A substance reacts with initial concentration of a mol/dm3 according to zero order kinetics. The time it takes for the completion of the reaction is (k = rate constant)?

Choices

Choice (4) Response
a.

k/a

b.

a/2k

c.

2k/a

d.

a/k

Question number: 528

» Chemical Kinetics » Activation Energy

MCQ▾

Question

Activation energy of a reaction is?

Choices

Choice (4) Response
a.

The energy needed to form one mole of product

b.

The energy released during the reaction

c.

The energy evolved when activation complex is formed

d.

Minimum amount of energy needed to overcome potential barrier

Question number: 529

» Chemical Kinetics » Rate of a Chemical Reaction

MCQ▾

Question

Molecularity of a reaction is?

Choices

Choice (4) Response
a.

Can have a fractional value

b.

Never a whole number

c.

Can be zero

d.

A whole number

Question number: 530

» Chemical Kinetics » Differential and Integral Forms of Zero and First Order Reactions

MCQ▾

Question

90 % of the first order reaction is completed in 70 minutes. The velocity constant of the reaction is?

Choices

Choice (4) Response
a.

0.0329

b.

3.29

c.

0.0293

d.

0.329

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