NSO Level 1- Science Olympiad (SOF) Class 10: Questions 827 - 834 of 986

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Question number: 827

» Chemical Reactions and Equation

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MCQ▾

Question

The reaction represents

Choices

Choice (4) Response

a.

Combination

b.

Reduction

c.

Decomposition

d.

Oxidation

Question number: 828

» Metals and Non - Metals

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MCQ▾

Question

Which is not an example of native elements that are semimetals?

Choices

Choice (4) Response

a.

Antimony

b.

Tellurium

c.

Arsenic

d.

Titanium

Question number: 829

» Metals and Non - Metals

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MCQ▾

Question

Strongest natural metal is

Choices

Choice (4) Response

a.

Tungsten

b.

Steel

c.

Gold

d.

Brasses

Question number: 830

» Chemical Reactions and Equation

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MCQ▾

Question

Rancidity can be prevented by

Choices

Choice (4) Response

a.

Adding antioxidants to oily food-stuff

b.

Packing of food materials in air tight containers

c.

Refrigeration of cooked food at low temperature

d.

All a. , b. and c. are correct

Question number: 831

» Light - Reflection and Refraction

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MCQ▾

Question

For a plane mirror, magnification

Choices

Choice (4) Response

a.

1

b.

0

c.

d.

Question number: 832

» Metals and Non - Metals

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MCQ▾

Question

An element reacts with oxygen. During this reactions, it produces a light blue flame. This compound is also insoluble in water. The elements is likely to be

Choices

Choice (4) Response

a.

Copper

b.

Iron

c.

Nickle

d.

Zinc

Question number: 833

» Our Environment and Its Management

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MCQ▾

Question

Choose incorrect method of waste disposal

Choices

Choice (4) Response

a.

Recycling

b.

Land fillings

c.

Biogas plant

d.

All a. , b. and c. are correct

Question number: 834

» Magnetic Effects of Electric Current

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MCQ▾

Question

A long current carrying wire PQ is free to move when placed in a magnetic field B at right angles to the wire, as shown. Then

Choices

Choice (4) Response

a.

It will move upwards, downwards the observer

b.

It will move along the magnetic field to the right

c.

It will not move at all

d.

It will move downward, away from the observer