NSO Level 1- Science Olympiad (SOF) Class 10: Questions 611 - 613 of 986

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Question number: 611

» Magnetic Effects of Electric Current

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MCQ▾

Question

For a current in a long straight solenoid N and S-poles are created at the two ends. Among the following statements, the incorrect statement is

Choices

Choice (4) Response

a.

The field lines inside the solenoid are in the form of straight lines, which indicates that the magnetic field is the same at all points inside the solenoid

b.

The strong magnetic field produced inside the solenoid can be used to magnetise a piece of magnetic material like soft iron, when placed inside the coil

c.

The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet

d.

The N and S-poles exchange position when the direction of current through the solenoid is reversed

Question number: 612

» Acids, Bases and Salts

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MCQ▾

Question

When is added to Solution

Choices

Choice (4) Response

a.

Oxygen is evolved

b.

Hydrogen is evolved

c.

Water is evolved

d.

No Action takes places

Question number: 613

» Acids, Bases and Salts

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MCQ▾

Question

Read the paragraph and Answer the question.

Addition of carbon dioxide, water and Sodium Carbonate, it gives baking soda Baking soda is used for the kitchen for making tasty crispy pakoras, mild edible acid such as tartaric acid etc.

Ratio of water molecules in sodium carbonate: Baking soda is

Choices

Choice (4) Response

a.

2: 1

b.

c.

1: 2

d.

Question does not provide sufficient data or is vague