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Chemistry

Chemistry
Among the following, carbonate ore of Zinc is

Zincite
Zincblende
Sphalerite
Calamine

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Chemistry
Which of the following does the Nucleus of an atom consist of?

Electrons
Protons
Protons and electrons
Protons and neutrons

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Chemistry
Two moles of an ideal gas expand freely into vacuum. The work done by the gas is

Infinity
2J
4J

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Chemistry
If there is one million Mg2+ ions in MgCl2, how many chloride ions are there?

One million
Ten million
Half a million
Two million

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Chemistry
J.J. Thomson’s proposed model of atom is generally called ________ model.

Cream and cake
Cream and pudding
Plum and pudding
Plum and cake

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Chemistry
The main component of liquid bleach is:

Sodium hypochlorate
Sodium hypochlorite
Hydrochloric acid
Sodium chloride

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