NSO Level 1- Science Olympiad (SOF) Class 10: Questions 636 - 640 of 986

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Question number: 636

» Chemical Reactions and Equation

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MCQ▾

Question

The molecules of oxygen and hydrogen for balanced equation is,

Choices

Choice (4) Response

a.

12,24

b.

, 12

c.

10,20

d.

8,16

Question number: 637

» Magnetic Effects of Electric Current

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MCQ▾

Question

Choose the incorrect statement.

Choices

Choice (4) Response

a.

Fleming’s right hand rule is a simple rule to know the direction of induced current

b.

The right hand thumb rule is used to find the direction of magnetic fields due to current carrying conductors

c.

The difference between the direct and alternating currents is that the direct current always flows in 1 direction, where as the alternating current reverses its direction periodically

d.

In India, the AC changes direction after every second

Question number: 638

» Carbon and Its Componds

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MCQ▾

Question

Image shown the reaction of Ethanol with sodium

Image Shown the Reaction of Ethanol with Sodium

The reaction of Ethanol with sodium

In this reaction which of the following is evolved?

Choices

Choice (4) Response

a.

And Water

b.

Water

c.

Hydrogen

d.

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