Chemistry-Physical and Chemical Changes (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 24 - 29 of 44

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Question number: 24

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Which of the following is an exothermic reaction?

Choices

Choice (4) Response

a.

Respiration

b.

Electrolysis of water

c.

Conversion of limestone into quicklime

d.

Photosynthesis

Question number: 25

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Ankit while heating solid lead nitrate taken in a test-tube, observed

Choices

Choice (4) Response

a.

brown residue of Equation

b.

green residue of Equation

c.

yellow residue of Equation

d.

white residue to Equation

Question number: 26

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

In the presence of concentrated sulphuric acid Equation , acetic acid reacts with ethyl alcohol to produce

Choices

Choice (4) Response

a.

Aldehyde

b.

Ester

c.

alcohol

d.

carboxylic acid

Question number: 27

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Arrange the following elements in order of their increasing ionization energies O, S, Se, Te, Po

Choices

Choice (4) Response

a.

O, S, Se, Te, Po

b.

Po, Te, Se, S, O

c.

Se, Te, S, Po, O

d.

Te, O, S, Po, Se

Question number: 28

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

A cell is kept in a solution for sometimes, when it bursts. The solution should be

Choices

Choice (4) Response

a.

Hypotonic

b.

Hypertonic

c.

Monotonic

d.

Isotonic

Question number: 29

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

The gas you use in kitchen is called Liquefied Petroleum Gas (LPG). In the cylinder, it exists as a liquid. When it comes out of the cylinder, it becomes a gas (process A), then it burns (process B).

Choose the correct statement.

Choices

Choice (4) Response

a.

processes A and B are chemical changes

b.

Process A is chemical change

c.

Process B is a chemical change

d.

All of the above

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