Chemistry (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 21 - 25 of 144

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Question number: 21

» Chemistry » Acid Bases and Salt

MCQ▾

Question

Boyle suggested some properties of acid; choose the correct set of them.

Choices

Choice (4) Response

a.

Sour taste, corrosive change litmus from red to blue

b.

Sour taste, slippery change litmus from blue to red

c.

Sour taste, corrosive change litmus from blue to red

d.

Sweet taste, slippery change litmus from blue to red

Question number: 22

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

The group of sedimentary minerals including, gypsum, potash salt and sodium salt are formed as a result of which process?

Choices

Choice (4) Response

a.

Decomposition

b.

Evaporation

c.

Distillation

d.

All of the above

Question number: 23

» Chemistry » Acid Bases and Salt

MCQ▾

Question

Which of the following substances is essential solute in saline water?

Choices

Choice (4) Response

a.

Ammonium chloride

b.

Salicylic acid

c.

Acetic acid

d.

Sodium chloride

Question number: 24

» Chemistry » Structure of Atom

MCQ▾

Question

Consider the information given below regarding atomic radius.

I. It is the half of the distance between the centers of two atoms of an element that are just touching each other.

II. It decreases across a period and increases on going down a group.

Which of the above statement (s) is/are correct?

Choices

Choice (4) Response

a.

Only I

b.

I and II

c.

Only II

d.

Question does not provide sufficient data or is vague

Question number: 25

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

When a nuclear change occurs, what happens to the energy?

Choices

Choice (4) Response

a.

It is destroyed

b.

It is released

c.

It remains unchanged

d.

All of the above

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