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Chemistry

Chemistry
The weight of 6.023 × 1022 atoms of carbon is

120 gms
1.2 gms
0.12 gms
12 gms

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Chemistry
The inert gases are ____ in water

sparingly soluble
None of these
insoluble
soluble

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Chemistry
The most electropositive elements among the following is

Ca
K
Na
Cs

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Chemistry
Which of the following metals form an amalgam with other metals ?

Mercury
Lead
Tin
Zinc

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Chemistry
Which of the following is used in welding broken pieces of iron rails and machine parts?

Aluminium powder
Solder
None of these
Aluminium sulphate

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Chemistry
Which of the following is used to increase the anti-knocking property of petrol ?

Trimethyl lead
Tetramethyl lead
Tetraethyl lead
Triethyl lead

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