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UIIC ASSISTANT RECRUITMENT General Awareness Study Material

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General Chemistry

The acid which fails to liberate carbon dioxide from sodium bicarbonate is

a) Formic acid
b) Sulphuric acid
c) Acetic acid
d) Carbonic acid

✔Answer

✔Solution

Correct Answer Is : Carbonic acid

Solution Is : Since all three option reacts with sodium bicarbonate to given Co? expect carbonic acid.

Oxide of sulphur present in the atmosphere are washed down by rains to cause

a) Eutrophication in lakes
b) Depletion of fossil fuel reserves
c) Lowering of PH of soil
d) Industrial smog formation

✔Answer

✔Solution

Correct Answer Is : Industrial smog formation

Solution Is : Oxide of sulphur present in the atmosphere are washed down by rains to cause industrial smog formation.

Chemical composition of heavy water is

a) D₂O
b) H₂O₂
c) HDO
d) H₂O

✔Answer

✔Solution

Correct Answer Is : D₂O

Solution Is : Heavy water or deuterium oxide is a form of water that contains a larger than normal amount of hydrogen isotope.

Q.Which one of the following is used in making pencils?

a) Black ash
b) Graphite
c) Charcoal
d) Bone black

✔Answer

✔Solution

Correct Answer Is : Graphite

Solution Is : Graphite is used in making pencils

Water is an excellent solvent because its molecules are

a) Light weight
b) Neutral
c) Highly polar
d) Non polar

✔Answer

✔Solution

Correct Answer Is : Highly polar

Solution Is : Water is an excellent solvent because its molecules are highly polar

Soda ash is the name for

a) Sodium bicarbonate
b) Hydrated sodium carbonate
c) Sodium hydroxide
d) Anhydrous sodium carbonate

✔Answer

✔Solution

Correct Answer Is : Sodium bicarbonate

Solution Is : Soda ash is the name for Sodium bicarbonate

Yeasts bring about fermentation by the action of a complex enzyme known as

a) Peroxidase
b) Zymase
c) Invertase
d) Catalase

✔Answer

✔Solution

Correct Answer Is : Zymase

Solution Is : Zymase is an enzyme complex that catalyses the fermentation of sugar in to ethanol carbon dioxide. It naturally occurs in years.

The purity of 14 carat gold is

a) 14.6 Per cent
b) 30 Per cent
c) 58.4 Per cent
d) 75.5 Per cent

✔Answer

✔Solution

Correct Answer Is : 58.4 Per cent

Solution Is : The purity of 14 carat gold is 58.4 Per cent.

The compound which contains both ionic and covalent bounds is

a) KCN
b) CO
c) CH4
d) H2

✔Answer

✔Solution

Correct Answer Is : KCN

Solution Is : The compound which contains both ionic and covalent bounds is KCN.

Which of the following is not a Carboxylic acid?

a) Picric acid
b) Tartaric Acid
c) Formic acid
d) Citric acid

✔Answer

✔Solution

Correct Answer Is : Picric acid

Solution Is : Picric acid is not a Carboxylic acid.

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UIIC ASSISTANT RECRUITMENT General Awareness Study Material

General Chemistry

The acid which fails to liberate carbon dioxide from sodium bicarbonate is

Correct Answer Is : Carbonic acid

Solution Is : Since all three option reacts with sodium bicarbonate to given Co? expect carbonic acid.

Oxide of sulphur present in the atmosphere are washed down by rains to cause

Correct Answer Is : Industrial smog formation

Solution Is : Oxide of sulphur present in the atmosphere are washed down by rains to cause industrial smog formation.

Chemical composition of heavy water is

Correct Answer Is : D2O

Solution Is : Heavy water or deuterium oxide is a form of water that contains a larger than normal amount of hydrogen isotope.

Q.Which one of the following is used in making pencils?

Correct Answer Is : Graphite

Solution Is : Graphite is used in making pencils

Water is an excellent solvent because its molecules are

Correct Answer Is : Highly polar

Solution Is : Water is an excellent solvent because its molecules are highly polar

Soda ash is the name for

Correct Answer Is : Sodium bicarbonate

Solution Is : Soda ash is the name for Sodium bicarbonate

Yeasts bring about fermentation by the action of a complex enzyme known as

Correct Answer Is : Zymase

Solution Is : Zymase is an enzyme complex that catalyses the fermentation of sugar in to ethanol carbon dioxide. It naturally occurs in years.

The purity of 14 carat gold is

Correct Answer Is : 58.4 Per cent

Solution Is : The purity of 14 carat gold is 58.4 Per cent.

The compound which contains both ionic and covalent bounds is

Correct Answer Is : KCN

Solution Is : The compound which contains both ionic and covalent bounds is KCN.

Which of the following is not a Carboxylic acid?

Correct Answer Is : Picric acid

Solution Is : Picric acid is not a Carboxylic acid.

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Correct Answer Is : D₂O