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Chemistry

Chemistry
The most electropositive elements among the following is

Cs
K
Ca
Na

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Chemistry
The next higher homologue of C6H14 is

C6H12
C7H16
C7H14
C7H12

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Chemistry
The pH of lemon juice is expected to be

More than 7
Nothing can be predicted
Less than 7
Equal to 7

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Chemistry
The inherited traits of an organism are controlled by

RNA molecules
enzymes
nucleotides
DNA molecules

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Chemistry
Hydrogen is not found in atmosphere because

It is absorbed by plants
It immediately combines with oxygen to form water
It is highly inflammable
It is the lightest gas

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Chemistry
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called

liquation
levigation
leaching
magnetic separation

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