NSO Level 1- Science Olympiad (SOF) Class 10: Questions 622 - 629 of 1497

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Question 622

Question MCQ▾

What is the purpose of polling process?

Choices

Choice (4)Response

a.

Removal of from

b.

Removal of from

c.

Removal of from

d.

For the removal of from

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Question 623

Question MCQ▾

is known as … ?

Choices

Choice (4)Response

a.

Bauxite

b.

Cryolite

c.

Feldspar

d.

China clay

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Question 624

Question MCQ▾

Which of the following is the formula of benzene?

Choices

Choice (4)Response

a.

b.

c.

d.

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Question 625

Question MCQ▾

Which of the following one is ore of Zinc?

Choices

Choice (4)Response

a.

Haematite

b.

Dolomite

c.

Calamine

d.

Cryolite

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Question 626

Question MCQ▾

In homologous series. All the members have the same … formula?

Choices

Choice (4)Response

a.

General formula

b.

Physical properties

c.

Molecular formula

d.

Empirical formula

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Question 627

Question MCQ▾

Generally ethanol is used in?

Choices

Choice (4)Response

a.

Tincture iodine

b.

Alcoholic drink

c.

Cough syrup

d.

Question does not provide sufficient data or is vague

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Question 628

Question MCQ▾

Ester can be prepared from the acid and the alcohol. What are the chemical formulas of then two compounds?

Choices

Choice (4)Response

a.

b.

c.

d.

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Question 629

Question MCQ▾

What is the ratio of hydrogen atoms in propane and propyne?

Choices

Choice (4)Response

a.

1: 2

b.

2: 3

c.

2: 1

d.

3: 2

Edit