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Test: Is Matter Around Us Pure - 2 - UPSC MCQ


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9 Questions MCQ Test Science & Technology for UPSC CSE - Test: Is Matter Around Us Pure - 2

Test: Is Matter Around Us Pure - 2 for UPSC 2024 is part of Science & Technology for UPSC CSE preparation. The Test: Is Matter Around Us Pure - 2 questions and answers have been prepared according to the UPSC exam syllabus.The Test: Is Matter Around Us Pure - 2 MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Is Matter Around Us Pure - 2 below.
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Test: Is Matter Around Us Pure - 2 - Question 1

A Substance can be beaten into sheets and beaten into wires. What will you call it?

Detailed Solution for Test: Is Matter Around Us Pure - 2 - Question 1

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.

Test: Is Matter Around Us Pure - 2 - Question 2

Match the following with correct response. 

Detailed Solution for Test: Is Matter Around Us Pure - 2 - Question 2

Mixtures are one product of mechanically blending or mixing chemical substances such as elements and compounds, without chemical bonding or other chemical change, so that each ingredient substance retains its own chemical properties and makeup.
A chemical compound is a substance composed of two or more different elements chemically bonded together in a fixed proportion by mass. However, not all molecules are compounds. Compounds are pure substances that contain two or more elements combined in a definite fixed proportion.
Any substance that contains only one kind of an atom is known as an element. Because atoms cannot be created or destroyed in a chemical reaction, elements such as phosphorus (P4) or sulfur (S8) cannot be broken down into simpler substances by these reactions.
When a molecule is formed from elements of a different species it is a heteroatomic molecule. As an atom is the smallest particle of an element that retains the properties of that element, a molecule is the smallest particle of a compound.

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Test: Is Matter Around Us Pure - 2 - Question 3

Clouds and fogs are example of

Detailed Solution for Test: Is Matter Around Us Pure - 2 - Question 3

Clouds and fogs are example of liquid in gas solution. Cloud is formed by combination of water vapour with dust particles. Fogs contain water vapour and gases.

Test: Is Matter Around Us Pure - 2 - Question 4

When a beam of light is passed through a colloidal solution, it gets.

Detailed Solution for Test: Is Matter Around Us Pure - 2 - Question 4

Scattering of beam of light when passes through a solution is called tyndall effect. Colloidal solution shows the tyndall effect and scatter the beam of light.

Test: Is Matter Around Us Pure - 2 - Question 5

Which of the following has the smell of rotten egg?

Detailed Solution for Test: Is Matter Around Us Pure - 2 - Question 5

Hydrogen sulfide gas produces an offensive "rotten egg" or "sulfur water" odor and taste in the water. In some cases, the odor may be noticeable only when the water is initially turned on or when hot water is run. Heat forces the gas into the air which may cause the odor to be especially offensive in a shower. Occasionally, a hot water heater is a source of hydrogen sulfide odor. The magnesium corrosion control rod present in many hot water heaters can chemically reduce naturally occurring sulfates to hydrogen sulfide.

Test: Is Matter Around Us Pure - 2 - Question 6

What is the name given to the liquid which contains in it some suspended particles?

Detailed Solution for Test: Is Matter Around Us Pure - 2 - Question 6

The liquid which contains some suspended particles are called suspension. The size of particle is more than 100nm.

Test: Is Matter Around Us Pure - 2 - Question 7
Which property is NOT a characteristic of a solution?
Detailed Solution for Test: Is Matter Around Us Pure - 2 - Question 7
In a solution, particles are too small to scatter light, unlike suspensions and colloids where the Tyndall effect is observed.
Test: Is Matter Around Us Pure - 2 - Question 8
Which of the following is an example of a solid in a liquid colloid?
Detailed Solution for Test: Is Matter Around Us Pure - 2 - Question 8
Milk of magnesia is an example of a solid in liquid colloid, where solid particles are dispersed in a liquid medium.
Test: Is Matter Around Us Pure - 2 - Question 9
How many naturally occurring elements are there?
Detailed Solution for Test: Is Matter Around Us Pure - 2 - Question 9
There are 92 naturally occurring elements. These elements are found in nature and have not been created artificially. An interesting fact is that the remaining elements beyond these 92 are man-made and are typically created in laboratories or nuclear reactors.
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