Chemistry (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 48 - 54 of 63

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Question number: 48

» Chemistry » Acid Bases and Salt

MCQ▾

Question

How many times a solution of Equation be diluted to get a solution of Equation ?

Choices

Choice (4) Response

a.

10 times

b.

100 times

c.

1000 times

d.

2 times

Question number: 49

» 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: 50

» Chemistry » Acid Bases and Salt

MCQ▾

Question

pH of sodium carbonate Equation solution will be

Choices

Choice (4) Response

a.

> 7

b.

1

c.

< 7

d.

7

Question number: 51

» 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: 52

» 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: 53

» 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

Question number: 54

» Chemistry » Acid Bases and Salt

MCQ▾

Question

When a base is dissolved in water

Choices

Choice (4) Response

a.

no change in concentration of OH- ions per unit volume occurs

b.

concentration of OH- ions per unit volume increases

c.

concentration of OH- ions per unit volume may increase or decrease depending upon the nature of the base

d.

concentration of OH- ions per unit volume decreases

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