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Chemistry

Chemistry
The weight of 6.023 × 1022 atoms of carbon is

1.2 gms
0.12 gms
12 gms
120 gms

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Chemistry
Which one of the following is not present in cement ?

Alumina
Clay
Alum
Gypsum

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Chemistry
Highest percentage of carbon is found in which form of coal?

Peat
Anthracite
Bituminous
Lignite

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Chemistry
Depletion of ozone layer causes

Skin cancer
Blood cancer
Lung cancer
Breast cancer

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Chemistry
Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful

SO2 in the air
Solar ultraviolet radiation
CO2 in the air
Solar infrared radiation

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Chemistry
Which halide is used in making sensitive emulsion on photograhic film?

Silver bromide
Silver iodide
Sodium chloride
Silver chloride

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