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Chemistry

Chemistry
The weight of 6.023 × 1022 atoms of carbon is

1.2 gms
120 gms
0.12 gms
12 gms

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Chemistry
Which of the following laser types is used in a laser printer?

Gas laser
Semiconductor laser
Excimer laser
Dye laser

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Chemistry
Which of the following is not present in RNA

Uracil
Ribose
Phosphate
Thymine

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Chemistry
Which of the following is the strongest base in aqueous solution ?

Diethylamine
Triethylamine
Ammonia
Ethylamine

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Chemistry
Detergents used for cleaning clothes and utensils contain

Bicarbonates
Bismuthates
Sulphonates
Nitrates

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Chemistry
The element used for making solar cells is

Calcium
Silicon
Sodium
Magnesium

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