NSO Level 1- Science Olympiad (SOF) Class 10: Questions 960 - 962 of 986

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Question number: 960

» Metals and Non - Metals

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MCQ▾

Question

An alloy which does contain iron is

Choices

Choice (4)Response

a.

Steel

b.

Brass

c.

Bronze

d.

Solder

Question number: 961

» Chemical Reactions and Equation

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MCQ▾

Question

Two students noted the initial colour of the solutions kept in breakers, after inserting rods in each solution and leaving it undisturbed for two hours, the colour of each solution was again noted.

The observation for metal and salt solution

The Observation for Metal and Salt Solution

They recorded their observations in the form of table given below:

Table of the Color of the solution

Table of the Color of the solution

Student

Color of the solution

A

Initial

Final

Colorless

Colorless

Colorless

Colorless

Colorless

Colorless

Colorless

Colorless

B

Initial

Final

Colorless

Colorless

Light Green

Colorless

Colorless

Colorless

Blue

Reddish brown

Which student noted the color change in all the two beakers correctly?

Choices

Choice (4)Response

a.

B student

b.

A student

c.

Question does not provide sufficient data or is vague

d.

All of the above

Question number: 962

» Sources of Energy

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MCQ▾

Question

Choose correct disadvantage/ (s) of geothermal energy is/are

Choices

Choice (4)Response

a.

Expensive

b.

Only few sites available for harnessing energy

c.

High installation cost

d.

All a. , b. and c. are correct

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