NSO Level 2- Science Olympiad (SOF) Class 6: Questions 29 - 31 of 100

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Question number: 29

» Mental Ability

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Appeared in Year: 2016

MCQ▾

Question

Ms. Shobhna conducted a science activity in following steps:

I She made crystals of pure copper sulphate from an impure sample.

II She dissolved the crystals in pure water to make a blue solution.

III She added a metallic piece into the copper sulphate solution and after some time colour of the solution changed to green.

Which of the following statements is correct regarding this activity?

Choices

Choice (4) Response

a.

All the steps involve chemical changes.

b.

All the steps involve physical changes.

c.

Step I involves a physical change while steps II and III involve chemical changes.

d.

Steps I and II involve physical changes while step III involves chemical change.

Question number: 30

» Mental Ability

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Appeared in Year: 2016

MCQ▾

Question

To separate constituents of a mixture, Varsha adopted the following methods

Image shows Saw Dust (Solid)

Image Shows Saw Dust (Solid)

Image shows Saw Dust (Solid)

What could be the methods (X) and (Y)?

Choices

Choice (4) Response

a.

(X) Filtration; (Y) Evaporation

b.

(X) Distillation; (Y) Centrifugation

c.

(X) Sedimentation; (Y) Decantation

d.

(X) Loading: (Y) Condensation

Question number: 31

» Mental Ability

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Appeared in Year: 2016

MCQ▾

Question

A bar magnet is dipped in iron filings and taken out. Which of the following observations is correct?

Choices

Choice (4) Response

a.

The maximum quantity will be sticked at the North Pole only.

b.

The maximum quantity of filings gets sticked to the ends of the magnet.

c.

The maximum quantity of filings gets sticked to the middle.

d.

The filings gets uniformly distributed.