Practice MCQ Questions and answers on Chemistry-GK Page-13 section-4

Section 1 Section 2 Section 3 Section 4 Section 5 Section 6 Section 7 Section 8 Section 9 Section 10 Section 11 Section 12

121.
The water pollution in river is measured by the dissolved amount of

A. Chlorine

B. Ozone

C. Nitrogen

D. Oxygen

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122.
Ultraviolet rays can be used in water treatment as

A. Flocculator

B. Precipitator

C. Hydrolyser

D. Disinfectant

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123.
Tar roads get damaged if there is

A. Stagnation of water on road

B. Heavy traffic

C. No maintenance

D. No sloping

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124.
Aerated water contains

A. SO₂

B. NO₂

C. H₂

D. CO₂

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125.
The BOD values of water indicate the

A. Amount of organic debris

B. Amount of oxygen used for biochemical oxidation

C. Amount of oxygen used for biochemical reduction

D. Amount of ozone used for biochemical oxidation

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126.
Iron and manganese present as pollutants in water cannot be removed by________

A. Oxidation followed by settling and filtration

B. Chlorination

C. Ion exchange process

D. Lime soda process or manganese zeolite process

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127.
Table salt gets moist during rainy season because

A. Sodium chloride is hygroscopic

B. Sodium chloride is deliquescent

C. Sodium chloride contains some quantity of sodium iodide

D. Sodium chloride contains hygroscopic impurities like magnesium chloride

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128.
The unit to measure the flow of water is

A. Micro Mho

B. Ohm meter

C. Milli curie

D. Cusecs

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129.
When water itself combines chemically with some element or mineral it is called

A. Carbonation

B. Desilication

C. Hydration

D. Oxidation

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130.
Sea water is saltier than rain water because

A. Sea animals are salt producing

B. The air around the sea is saltish

C. Rivers wash away salts from earth and pour them into the sea

D. Sea beds have salt producing mines

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Practice MCQ Questions and answers on Chemistry-GK

121. The water pollution in river is measured by the dissolved amount of

Answer & Solution

122. Ultraviolet rays can be used in water treatment as

Answer & Solution

123. Tar roads get damaged if there is

Answer & Solution

124. Aerated water contains

Answer & Solution

125. The BOD values of water indicate the

Answer & Solution

126. Iron and manganese present as pollutants in water cannot be removed by________

Answer & Solution

127. Table salt gets moist during rainy season because

Answer & Solution

128. The unit to measure the flow of water is

Answer & Solution

129. When water itself combines chemically with some element or mineral it is called

Answer & Solution

130. Sea water is saltier than rain water because

Answer & Solution

Read More Section(Chemistry)

121.
The water pollution in river is measured by the dissolved amount of

122.
Ultraviolet rays can be used in water treatment as

123.
Tar roads get damaged if there is

124.
Aerated water contains

125.
The BOD values of water indicate the

126.
Iron and manganese present as pollutants in water cannot be removed by________

127.
Table salt gets moist during rainy season because

128.
The unit to measure the flow of water is

129.
When water itself combines chemically with some element or mineral it is called

130.
Sea water is saltier than rain water because