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Chemistry

Chemistry
Which of the following metals has least melting point ?

Silver
Mercury
Gold
Copper

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Chemistry
Nucleus of an atom consists of.

Proton and Neutron
Neutron
Proton
Electron, Proton and Neutron

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Chemistry
Iron is prevented from rusting by coating with zinc. This process is called as

Galvanisation
Reduction
Sublimation
Corrosion

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Chemistry
Among the following, which is always found in free-state in nature?

Copper
Sodium
Gold
Silver

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Chemistry
Which of the following fuels causes minimum environmental pollution?

Diesel
Hydrogen
Kerosene
Coal

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Chemistry
Which of the following has no unit

Ionization energy
Excitation potential
Electron affinity
Electronegativity

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