CBSE Class-7 Science: Questions 42 - 48 of 322

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 322 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 250.00 or

Question number: 42

» Weather, Climate and Adaptations of Animals to Climate » Weather » Minimum and Maximum Thermometer

MCQ▾

Question

Special thermometers for noting the maximum and minimum temperatures at a place are called as:

Choices

Choice (4) Response
a.

Maximum Thermometers

b.

Maximum and minimum thermometers

c.

Minimum thermometers

d. All of the above

Question number: 43

» Heat » Transfer of Heat » Conduction

MCQ▾

Question

Applications of conduction are:

Choices

Choice (4) Response
a.

Refrigerators

b.

Woollen clothes

c.

Double layer blankets

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

Question number: 44

» Fibre to Fabric » Silk » Sericulture

MCQ▾

Question

Sericulture is defined as:

Choices

Choice (4) Response
a.

The process of drawing the silk filaments from cocoon

b.

A type of fibre obtained from the angora goat

c.

The process of rearing silkworm from the production of silk

d.

Domestication of sheep for wool

Question number: 45

» Heat » Hot and Cold » Hot and Cold Objects

MCQ▾

Question

Ice-cream, Ice, juice, things placed in the refrigerator is:

Choices

Choice (4) Response
a.

Hot objects & Warm objects

b.

Cold objects

c.

Warm objects

d.

Hot objects

Question number: 46

» Acids, Bases and Salts » Acids and Bases » Indicators

MCQ▾

Question

Substances, which are used to test whether a substance is acidic or basic, are called as:

Choices

Choice (4) Response
a.

Cation

b.

Indicators

c.

Anions

d.

Litmus

Question number: 47

» Physical and Chemical Changes » Rusting of Iron » Prevention of Rusting

MCQ▾

Question

The simplest way to prevent rusting is:

Choices

Choice (4) Response
a.

To apply coat of paint

b.

To apply a coat of grease

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

Question number: 48

» Physical and Chemical Changes » Chemical Changes » Chemical Reactions and Its Examples

MCQ▾

Question

Chemical reaction involves the gain or loss of energy is called as:

Choices

Choice (4) Response
a.

Exothermic reaction

b.

Explosion

c.

Endothermic reaction

d. Question does not provide sufficient data or is vague

Sign In