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Chemistry

Chemistry
A matured mammalian cell without nucleus is

Spermatozoan
Erythrocyte
Oocyte
Lymphocyte

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Chemistry
Stains of rust on clothes can be removed by :

Petrol
Alcohol
H2O2
Oxalic acid

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Chemistry
The weight of 6.023 × 1022 atoms of carbon is

12 gms
120 gms
1.2 gms
0.12 gms

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

Clay
Alum
Gypsum
Alumina

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Chemistry
White coal is

Diamond
Uranium
None of these
Hydro-electricity

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Chemistry
Among the following iron ores, the highest percentage of iron content is found in–

None of these
Limnonite
Haemetite
Magnetite

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