Chemistry (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 54 - 60 of 63

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Question number: 54

» Chemistry » Acid Bases and Salt

MCQ▾

Question

How many times a solution of pH=3 be diluted to get a solution of pH=6 ?

Choices

Choice (4) Response
a.

10 times

b.

100 times

c.

1000 times

d.

2 times

Question number: 55

» Chemistry » Acid Bases and Salt

MCQ▾

Question

For dilution of a concentrated acid, we should add

Choices

Choice (4) Response
a.

water into the concentrated acid

b.

the above are correct

c.

concentrated acid into water

d.

first water into acid and then more acid

Question number: 56

» Chemistry » Acid Bases and Salt

MCQ▾

Question

pH of sodium carbonate (Na2CO3) solution will be

Choices

Choice (4) Response
a.

> 7

b.

1

c.

< 7

d.

7

Question number: 57

» Chemistry » Structure of Atom

MCQ▾

Question

The size of colloidal particles in a colloid range

Choices

Choice (4) Response
a.

108to107cmb.107to104cm

b.

105to103cmd.107to106cm

c. None of the above
d. Question does not provide sufficient data or is vague

Question number: 58

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

On electrolysis of brine solution, the products formed are

Choices

Choice (4) Response
a.

hydrogen, chlorine and sodium hydroxide

b.

sodium hydroxide, chlorine and oxygen

c.

sodium and chlorine

d.

hydrogen, chlorine and oxygen

Question number: 59

» Chemistry » Acid Bases and Salt

MCQ▾

Question

The soil for healthy growth of plants should be

Choices

Choice (4) Response
a.

Neither alkaline nor highly acidic

b.

Neither acidic nor highly alkaline

c.

highly acidic

d.

highly alkaline

Question number: 60

» Chemistry » Fibres and Plastics

MCQ▾

Question

Which of the following has the same monomer unit?

Choices

Choice (4) Response
a.

Cellulose and rayon

b.

Nylon and cellulose

c.

Rayon and nylon

d.

Polyester and nylon

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