NSO Level 1- Science Olympiad (SOF) Class 10: Questions 639 - 642 of 986

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Question number: 639

» Light - Reflection and Refraction

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MCQ▾

Question

For convex lens, when the object is placed at the focus , the image formed is

Choices

Choice (4)Response

a.

Virtual and erect

b.

At infinity

c.

Smaller than the object

d.

All of the above

Question number: 640

» Sources of Energy

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MCQ▾

Question

Which of the following is correct for anaerobic respiration?

Choices

Choice (4)Response

a.

Anaerobic respiration occurs through glycolysis and incomplete breakdown of pyruvate

b.

Anaerobic respiration occurs in the mitochondria

c.

Anaerobic respiration is found in all higher plants and animals

d.

Anaerobic respiration only occurs inside the cell

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

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