NSO Level 1- Science Olympiad (SOF) Class 10: Questions 641 - 645 of 986

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Question number: 641

» Light - Reflection and Refraction

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MCQ▾

Question

Choose correct one.

It has curved reflecting surface. This curved reflecting surface can be curved inward or outwart. This Mirror is

Choices

Choice (4) Response

a.

Convex Mirror

b.

Spherical Mirror

c.

Concave Mirror

d.

Plane Mirror

Question number: 642

» Metals and Non - Metals

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MCQ▾

Question

A mixture of Magnesium and Platinum with Hydrosulphuric acid is given. Hydrogen gas is evolved in this reaction, then we can say

Choices

Choice (4) Response

a.

Only Magnesium reacts Hydrosulphuric acid

b.

Only Platinum reacts Hydrosulphuric acid

c.

Magnesium and Platinum reacts Hydrosulphuric acid

d.

Question does not provide sufficient data or is vague

Question number: 643

» Sources of Energy

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MCQ▾

Question

Choose correct advantages of geothermal energy is/are

Choices

Choice (4) Response

a.

Expensive

b.

Many site available

c.

Renewable

d.

All of the above

Question number: 644

» Acids, Bases and Salts

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MCQ▾

Question

Read the given statements and mark the correct option.

Statement 1: of black coffee is less than that of water of the same concentrate.

Statement 2: Vegetable oil has a less pH value then baking soda.

Choices

Choice (4) Response

a.

Only statement 2 is Correct

b.

Only statement 1 is Correct

c.

Question does not provide sufficient data or is vague

d.

All of the above

Question number: 645

» Sources of Energy

Edit
MCQ▾

Question

Which of the incorrect option for disadvantage of hydropower plant?

Choices

Choice (4) Response

a.

Highly expensive to construct

b.

People face social and environment problems

c.

Large area of human habitation and agricultural get submerged

d.

More maintenance cost