Chemistry Practice Questions Set 8

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For India's Top Government Exams

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Which one among the following substances evolves heat when dissolved in water?
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1 point

Potassium nitrate

Sodium chloride

Glucose

Calcium oxide

DIRECTIONS: The following questions consist of two statements. Statement l and Statement ll. You are to examine these two statements carefully and select the answers to these items using the codes given below.
Statement l: Oxides of sulfur and nitrogen present in high concentrations in the air are dissolved in rain drops.
Statement ll: Oxyacids of sulfur and nitrogen make rain water acidic.
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1 point

Both the statements are individually true and statement ll is the correct explanation of Statement l.

Both the statements are individually true but Statement ll is not the correct explanation of Statement l.

Statement l is true, but Statement ll is false.

Statement l is false, but Statement ll is true.

Match List-l with List–ll and select the correct answer using the codes given below the lists.
List-l
(Acid)
A. Lactic acid
B. Tartaric acid
C. Oxalic acid
D. Citric acid
List-ll
(Source)
1. Tamarind
2. Orange
3. Tomato
4. Sour curd
*

1 point

A 2, B 3, C 1, D 4

A 2, B 1, C 3, D 4

A 4, B 3, C 1, D 2

A 4, B 1, C 3, D 2

A close bottle containing water at room temperature was taken to the Moon and then the lid is opened. The water will ___ *

1 point

freeze

boil

decompose into oxygen and hydrogen

not change at all

One of the occupational health hazards commonly faced by the workers of the ceramics, pottery, and glass industry is
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1 point

stone formation in the gall bladder

melanoma

silicosis

stone formation in kidney

The sacrificial anode protects iron or ships, underground pipelines, etc from rusting, a process known as cathodic protection. Which one of the following metals cannot be used as a sacrificial anode?
*

1 point

Tin

Zinc

Magnesium

Aluminum

Which one among the following would expand the most on being heated?
*

1 point

Water

Alcohol

Glass

Air

DIRECTIONS: The following questions consist of two statements. Statement l and Statement ll. You are to examine these two statements carefully and select the answers to these items using the codes given below.
Statement l: All liquids are conductors of electricity.
Statement ll: Under the condition of low pressure and high voltage, liquids can be made conducting.
*

1 point

Both the statements are individually true and statement ll is the correct explanation of Statement l.

Both the statements are individually true but Statement ll is not the correct explanation of Statement l.

Statement l is true, but Statement ll is false.

Statement l is false, but Statement ll is true.

DIRECTIONS: The following questions consist of two statements. Statement l and Statement ll. You are to examine these two statements carefully and select the answers to these items using the codes given below.
Statement l: On mixing with water, plaster of Paris hardens.
Statement ll: By combining with water, plaster of Paris is converted into gypsum. CaSO4 -2Hp Gypsum
*

1 point

Both the statements are individually true and statement ll is the correct explanation of Statement l.

Both the statements are individually true but Statement ll is not the correct explanation of Statement l.

Statement l is true, but Statement ll is false.

Statement l is false, but Statement ll is true.

Sodium thiosulphate (Na₂S₂O₃) solution is used in photography to ___
*

1 point

remove reduced silver

reduce silver bromide (AgBr) grain to silver

remove undecomposed AgBr as a soluble silver thiosulphate complex

convert the metallic silver to silver salt

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