NSO Level 1- Science Olympiad (SOF) Class 10: Questions 419 - 423 of 986

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Question 419

Question

MCQ▾

Read the given statements and mark the correct option

Statement 1: Ammeter always connected to parallel in a circuit

Statement 2: Voltmeter is a device to measure potential difference

Choices

Choice (4)Response

a.

Statements 1 and 2 are incorrect

b.

Only statement 2 is correct

c.

Statements 1 and 2 are correct

d.

Only statement 1 is correct

Question 420

Question

MCQ▾

When ethanoic acid react with sodium hydrogen carbonate, then a salt X is formed and gas Y is evolved. The gas evolved passes the gas through freshly prepared limewater, which turned milky. It was concluded that

Choices

Choice (4)Response

a.

X is sodium hydrogen carbonate and Y is carbon dioxide

b.

X is Sodium hydroxide and Y is carbon dioxide

c.

X is Sodium acetate and Y is carbon dioxide

d.

None of the above

Question 421

Question

MCQ▾

Changes in organisms that help it survive and reproduce in its environment is known as

Choices

Choice (4)Response

a.

Selection

b.

Genetic load

c.

Gene Flow

d.

Adaptation

Question 422

Question

MCQ▾

The Mendeleev arranged how many elements in the periodic table?

Choices

Choice (4)Response

a.

64

b.

74

c.

60

d.

63

Question 423

Question

MCQ▾

A strip of copper and another of germanium are cooled from room temperature to 30 K. The resistance of

Choices

Choice (4)Response

a.

Copper strip decreases and that of germanium increases

b.

Each of them decreases

c.

Each of them increases

d.

Copper strip increases and that of germanium decreases

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