Equilibrium (JEE (Based on NTA Guidelines-IIT Engg.) Mains Chemistry): Questions 1 - 5 of 95

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Question number: 1

» Equilibrium » Solid -Liquid, Liquid - Gas and Solid - Gas Equilibria

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Appeared in Year: 2002

MCQ▾

Question

If the value of Avogadro number is and the value of Boltzmann Constant is then the number of significant digits in the calculated value of the universal gas constant is (IIT JEE)

Choices

Choice (4) Response

a.

6.31174

b.

10.3114

c.

8.31174

d.

9.8114

Question number: 2

» Equilibrium » Ionic Equilibrium » pH Scale

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MCQ▾

Question

An acid-base indicator has a The acid form of the indicator is red and the base form is blue. (a) By how much must the pH change in order to change the indicator from 75 % red to 75 % blue.

Choices

Choice (4) Response

a.

0.9542

b.

0.2583

c.

0.4832

d.

0.5281

Question number: 3

» Equilibrium » Ionic Equilibrium » pH Scale

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MCQ▾

Question

The acid form of an acid base indicator is yellow in acid and red in basic form. What is the change in pH in order to change the indicator form yellow to red?

Choices

Choice (4) Response

a.

3.4

b.

0.5

c.

1.2

d.

2.3

Question number: 4

» Equilibrium » Ionic Equilibrium » Ionization Constants

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MCQ▾

Question

Bromophenol blue is an indicator with value of . What is the percentage of this inductor in its basic form at a pH of

Choices

Choice (4) Response

a.

75 %

b.

51 %

c.

80 %

d.

45 %

Question number: 5

» Equilibrium » Chemical Equilibrium

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MCQ▾

Question

If two gases and are mixed, the following equilibrium are readily established

For the reaction, if is mixed with only in the starting, then which of the following is necessarily true at equilibrium?

(1)

(2)

(3)

(4)

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1 and 3 are correct

c.

1,2 and 3 are correct

d.

1 and 2 are correct

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