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Chemistry

Chemistry
Among the following, carbonate ore of Zinc is

Zincblende
Sphalerite
Calamine
Zincite

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Chemistry
Which of the following is a renewable source of energy ?

Uranium
Geothermal powder
Natural gas
Coal

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Chemistry
The most important ore of lead is

Pyrolusite
Siderite
Magnetite
Galena

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Chemistry
Silver gets corroded due to ________ in air.

Nitrogen
Carbon dioxide
Oxygen
Hydrogen Sulphide

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Chemistry
The number of neutrons present in an element having mass number 226 and atomic number 88 is :

138
88
50
314

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Chemistry
Benzene cannot undergo :

Addition
Oxidation
Elimination
Substitution

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