CBSE Class-7 Science: Questions 85 - 90 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: 85

» Fibre to Fabric » Animal Fibres » From Fibres to Wool

MCQ▾

Question

What is Shearing?

Choices

Choice (4) Response
a.

Process of harvesting the wool

b.

The clean wool is passed through rollers

c.

Interlocks yarns into loops

d.

Interlocks pieces of yarn at right angles to one another

Question number: 86

» Fibre to Fabric » Animal Fibres » From Fibres to Wool

MCQ▾

Question

Clean wool is passed through roller, which is turn, straighten the fibres and removes unwanted matter is called as:

Choices

Choice (4) Response
a.

Spinning

b.

Carding

c.

Dyeing

d. None of the above

Question number: 87

» Acids, Bases and Salts » Neutralization in Everyday Life » Indigestion

MCQ▾

Question

Application of neutralisation in daily lives which helps in digestion of food are:

Choices

Choice (4) Response
a.

Brushing teeth

b.

Acids in stomach

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

Question number: 88

» Nutrition in Animals » Mouth and Buccal Cavity » Tooth Decay

MCQ▾

Question

Carelessness towards cleaning of teeth causes the acid to corrode the teeth and causes the:

Choices

Choice (4) Response
a.

Toothache

b.

Plaque

c.

Tooth decay

d. Question does not provide sufficient data or is vague

Question number: 89

» Acids, Bases and Salts » Natural Indicators Around Us » China Rose as Indicator

MCQ▾

Question

Indicator is made using a hibiscus flower is:

Choices

Choice (4) Response
a.

China rose indicator

b.

Hibiscus indicator

c.

Flower indicator

d. All of the above

Question number: 90

» Physical and Chemical Changes » Physical Changes » Introduction to Physical Changes

MCQ▾

Question

Examples of physical changes are:

Choices

Choice (4) Response
a.

Electric current on the filament of electric bulb and heater

b.

Interchanging of three states of matter

c.

Dissolution of sodium chloride

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

Sign In