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Chemistry

Chemistry
The maximum number of isomers for an alkene with molecular formula C4H8 is

3
2
4
5

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Chemistry
Which of the following is used as a lubricant in heavy machines?

Phosphorus
Graphite
Bauxite
Sulphur

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Chemistry
The weight of 6.023 × 1022 atoms of carbon is

12 gms
120 gms
0.12 gms
1.2 gms

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Chemistry
Silver nitrate solution is kept in brown bottles in laboratory because

Brown bottles react with it
It reacts with ordinary white bottles
Brown bottles stops the passage of light through it
Brown bottles do not react with it

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Chemistry
Adding Cl2 to benzene in the presence of AlCl3 is an example of :

Substitution reaction
Addition reaction
Elimination reaction
None of the options

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Chemistry
Among the fuels given below, the one with highest calorific value is

Natural gas
Coal
Wood
Coke

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