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Chemistry

Chemistry
The common refrigerant in domestic refrigerator is

Nitrogen
Neon
Freon
Oxygen

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Chemistry
The graphite rods in the nuclear reactor

undergo combustion which triggers the nuclear fission
convert fast moving neutrons into thermal neutrons
react with U to release energy
produce neutrons

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Chemistry
Name two elements that find wide application in transistor industry

Iridium and Germanium
Tungsten and Platinum
Carbon and Platinum
Silicon and Germanium

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Chemistry
For a spontaneous chemical process, the free energy change is

Zero
Depends on whether the reaction is exothermic or endothermic
Negative
Positive

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Chemistry
Tear gas used by the police to disperse the mob contains

Carbon dioxide
Hydrogen sulphide
Chlorine
Ammonia

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Chemistry
Methanoic and ethanoic acids can be distinguished by the action of

NaOH
Tollen's reagent
NaHCO3
SOCl2

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