Chemistry Quiz Set 07

Question No.1

Who among the following discovered Hydrogen ?

1. Daniel Rutherford
2. Joseph Priestley
3. Humphry Davy
4. Henry Cavendish

Select Answer

Correct Answer: ( D )  

Question No.2

The gas used to inflate the tyres of an aircraft is

1. Hydrogen
2. Helium
3. Nitrogen
4. All of these

Select Answer

Correct Answer: ( C )  

Question No.3

Which of the following chemical is used for the preservation of fruit juice?

1. Ammonium sulfate
2. Potassium nitrate
3. Sodium benzoate
4. Sodium hydroxide

Select Answer

Correct Answer: ( C )  

Question No.4

Which of the following is found in maximum amount in the layer of soil?

1. Oxygen
2. Nitrogen
3. Manganese
4. Silicon

Select Answer

Correct Answer: ( A )  

Question No.5

What changes are observed when acid is treated with litmus paper?

1. Red litmus turns blue
2. Blue litmus turns red
3. Litmus turns yellow
4. Litmus colour doesn't change

Select Answer

Correct Answer: ( B )  

Question No.6

Which of the following gases is responsible for the absorption of ozone layer?

1. Chloro fluorocarbon
2. Nitrous oxide
3. Carbon dioxide
4. Carbon monoxide

Select Answer

Correct Answer: ( A )  

Question No.7

Which of the following oxides is neutral?

1. CO₂
2. Na₂O
3. CaO
4. N₂0

Select Answer

Correct Answer: ( D )  

Question No.8

Which type of bond exists in the molecule of sodium chloride ?

1. Covalent bond
2. Coordinate covalent bond
3. Electrovalent bond
4. None of these

Select Answer

Correct Answer: ( C )  

Question No.9

The catalytic oxidation of NH₃ is obtained from

1. N₂
2. N₂O₅
3. NO
4. NO₂

Select Answer

Correct Answer: ( C )  

Question No.10

Which of the following is used to give green colour to glass?

1. Calcium oxide
2. Chromium oxide
3. Iron oxide
4. Manganese oxide

Select Answer

Correct Answer: ( B )  

Question No.11

Which of the following would be the most toxic refrigerant?

1. Freon-12
2. Ammonia
3. Sulphur dioxide
4. Carbon dioxide

Select Answer

Correct Answer: ( C )  

Question No.12

Which of the following substances can dissolve the element with molecular formula 'Au' ?

1. Hydrochloric acid
2. Nitric acid
3. Aqua regia
4. Acetic acid

Select Answer

Correct Answer: ( C )  

Question No.13

Baking powder is a mixture of

1. Sodium hydrogen carbonate & tartaric acid
2. Sodium hydrogen carbonate & sulphuric acid
3. Sodium hydrogen carbonate & malic acid
4. Sodium carbonate & tartaric acid

Select Answer

Correct Answer: ( A )  

Question No.14

Which chemical coating is used on the audio video tapes?

1. Iron oxide
2. Sodium hydroxide
3. Silver Iodide
4. None of these

Select Answer

Correct Answer: ( A )  

Question No.15

Which of the following is extracted from the ore of Felspar?

1. Magnesium
2. Calcium
3. Copper
4. None of these

Select Answer

Correct Answer: ( D )  

Question No.16

Which of the following is the molecular formula of heavy water?

1. H₂O₂
2. D₂O
3. DO
4. DO₂

Select Answer

Correct Answer: ( B )  

Question No.17

Oil, water & gas exist in the following ascending order in a well

1. Water, oil, gas
2. Gas, water, oil
3. Water, gas, oil
4. Oil, water, gas

Select Answer

Correct Answer: ( A )  

Question No.18

Which of the following is regarded as the best conductor of heat?

1. Iron
2. Silver
3. Gold
4. Copper

Select Answer

Correct Answer: ( B )  

Question No.19

A metallic bar is generally heated by the process of:

1. Radiation
2. Conduction
3. Convection
4. Radiation and convection

Select Answer

Correct Answer: ( B )  

Question No.20

What may be the right molecular formula of sulfur?

1. S₄
2. S₃
3. S₈
4. S

Select Answer

Correct Answer: ( C )  

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