NCERT Based General Studies (GS): Questions 3121 - 3126 of 3450

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Question number: 3121

» Science » Class-7 NCERT » Physical and Chemical Changes (Chemical Changes)

MCQ▾

Question

During a chemical change in addition to products following may be:

Choices

Choice (4) Response
a.

A gas is formed

b.

A change in smell and colour may takes place

c.

Heat, light or any other radiation may be given off or absorbed

d. All a. , b. and c. are correct

Question number: 3122

» Science » Class-7 NCERT » Physical and Chemical Changes (Chemical Changes)

MCQ▾

Question

Why cut fruits or vegetables turns drown when exposed to air:

Choices

Choice (4) Response
a.

Due to release of phenolic compounds

b.

Due to release of enzymes

c. Both a. and b. are correct
d. Question does not provide sufficient data or is vague

Question number: 3123

» Science » Class-7 NCERT » Heat (Transfer of Heat)

MCQ▾

Question

Houses in older times had very high roofs with ventilators provided high up based on the principle of:

Choices

Choice (4) Response
a.

Convection

b.

Conduction

c.

Radiations

d. All of the above

Question number: 3124

» Science » Class-7 NCERT » Physical and Chemical Changes (Chemical Changes)

MCQ▾

Question

The process of slowly eating away of a metal on exposure to air and moisture is called as:

Choices

Choice (4) Response
a.

Rusting

b.

Rust

c.

Crystallization

d. None of the above

Question number: 3125

» Science » Class-7 NCERT » Heat (Kinds of Clothes We Wear in Summer & Winter)

MCQ▾

Question

Kinds of clothes we wear in summers are:

Choices

Choice (4) Response
a.

Light coloured

b.

Dark coloured

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

Question number: 3126

» Science » Class-7 NCERT » Physical and Chemical Changes (Rusting of Iron)

MCQ▾

Question

The process in which a layer of zinc or chromium is deposited over the iron sheets is called as:

Choices

Choice (4) Response
a.

Alloying

b.

Crystallization

c.

Galvanization

d. Question does not provide sufficient data or is vague

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