Is Matter around Us Pure Test

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Is Matter around Us Pure Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

Name the most abundant element in earth’s crust?

A
Oxygen

B
CO₂

C
Hydrogen

D
Nitrogen

Solution

Explanation:

The most abundant element in earth’s crust is Oxygen. It is present in earth crust in form of oxide, carbonate etc. of metal.
Question 2
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The element which is a liquid slightly above 30⁰C is

A
Lithium

B
Cesium

C
Magnesium

D
Sodium

Solution

Explanation:

Cesium is a metal which has very low melting point and change into liquid state above 30⁰C.
Question 3
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At room temperature, a non-metal which is liquid is

A
Sulphur

B
Oxygen

C
Fluorine

D
Bromine

Solution

Explanation:

At room temperature, Bromine is present in liquid state. Bromine is a non-metal belonging to family of halogens.
Question 4
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A combination of common salt and iron filings is a

A
Elements

B
Mixture

C
both a and b

D
Compound

Solution

Explanation:

A combination of common salt and Iron filings is a mixture as there is no chemical reaction between them to form new substance.
Question 5
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Who discovered Radium?

A
None of these

B
Watson and crick

C
Marie Curie

D
Robert Brown

Solution

Explanation:

Radium was discovered by Marie Curie.
Question 6
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Which of the following substance is pure?

A
Compound

B
Both a and b

C
Element

D
Mixture

Solution

Explanation:

Element and compounds are pure substance. Pure substances are made up of only one kind of particles. Elements are made up of atoms and compounds are made up to molecules.
Question 7
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Which of the following has the smell of rotten egg?

A
Hydrogen Sulphide

B
Copper Sulphide

C
Iron Sulphide

D
Calcium Sulphide

Solution

Explanation:

Hydrogen sulphide gas has the smell of rotten egg.
Question 8
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Which of the following element has the characteristics of both metals and non – metals?

A
Phosphorus

B
Nitrogen

C
Carbon

D
Arsenic

Solution

Explanation:

The element that possesses characteristic of both metal and non-metal are called metalloid. Arsenic is the element that has properties of both metal and non-metal.
Question 9
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What are the major constituents of universe?

A
Nitrogen and oxygen

B
Hydrogen and oxygen

C
Helium and Nitrogen

D
Hydrogen and Helium

Solution

Explanation:

The major constituents of universe are Hydrogen and Helium. They are constituent of Sun, stars and other solar bodies.
Question 10
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A Substance can be beaten into sheets and beaten into wires. What will you call it?

A
It is both brittle and lustrous

B
It is both sonorous and ductile

C
It is both Malleable and ductile

D
It is both malleable and brittle

Solution

Explanation:

A substance that can be beaten into thin sheets and drawn into thin wire is both malleable and ductile. Gold is most malleable and ductile element.

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Is Matter around Us Pure Test - 1

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Question 1

Oxygen

CO2

Hydrogen

Nitrogen

Solution

Question 2

Lithium

Cesium

Magnesium

Sodium

Solution

Question 3

Sulphur

Oxygen

Fluorine

Bromine

Solution

Question 4

Elements

Mixture

both a and b

Compound

Solution

Question 5

None of these

Watson and crick

Marie Curie

Robert Brown

Solution

Question 6

Compound

Both a and b

Element

Mixture

Solution

Question 7

Hydrogen Sulphide

Copper Sulphide

Iron Sulphide

Calcium Sulphide

Solution

Question 8

Phosphorus

Nitrogen

Carbon

Arsenic

Solution

Question 9

Nitrogen and oxygen

Hydrogen and oxygen

Helium and Nitrogen

Hydrogen and Helium

Solution

Question 10

It is both brittle and lustrous

It is both sonorous and ductile

It is both Malleable and ductile

It is both malleable and brittle

Solution

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