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CHEMISTRY

Chemistry
Which of the following phenomenon is considered responsible for Global Warming?

Fire in coal mines
Dry farming
Greenhouse effect
Trade winds

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Chemistry
The nucleus of an atom consists of

electrons and neutrons
protons and neutrons
All of these
electrons and protons

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Chemistry
The number of moles of solute present in 1 kg of a solvent is called its

formality
molality
normality
molarity

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Chemistry
The most electronegative element among the following is

oxygen
fluorine
bromine
sodium

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Chemistry
The metal used to recover copper from a solution of copper sulphate is

Ag
Hg
Fe
Na

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