NSTSE (National Science Talent Search Exam- Unified Council) Class 6: Questions 1797 - 1803 of 2029

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Question 1797

Question

MCQ▾

In which of the following slow evaporation takes place?

Choices

Choice (4)Response

a.

Evaporation

b.

Centrifugation

c.

Distillation

d.

Crystallization

Question 1798

Question

MCQ▾

In sedimentation the liquid obtained is called .

Choices

Choice (4)Response

a.

Sediment liquid

b.

Pure liquid

c.

Supernatant liquid

d.

All of the above

Question 1799

Question

MCQ▾

Which of the following factors affect the solubility of a substance?

Choices

Choice (4)Response

a.

Size of solute particles

b.

Stirring

c.

Temperature

d.

All a., b. and c. are correct

Question 1800

Question

MCQ▾

Mixture of grain and husk can be separated by

Choices

Choice (4)Response

a.

Filtration

b.

Winnowing

c.

Hand picking

d.

Sedimentation

Question 1801

Question

MCQ▾

We use hand picking when there is

Choices

Choice (4)Response

a.

Much quantity of mixture

b.

Much quantity of substance

c.

Small quantity of mixture

d.

All of the above

Question 1802

Question

MCQ▾

Why water is a universal solvent?

Choices

Choice (4)Response

a.

It exist in all three states

b.

It dissolves many substances forming a aqueous solution

c.

All of the above

d.

None of the above

Question 1803

Question

MCQ▾

Which of the following substance are most soluble in water at 0C?

Choices

Choice (4)Response

a.

Potassium Chloride

b.

Sodium Nitrate

c.

Potassium Sulphate

d.

None of the above

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