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Chemistry

Chemistry
Electric fuse is an alloy of

Copper and iron
Zinc and lead
Carbon and tin
Tin and lead

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Chemistry
Who modified Bohr's theory by introducing elliptical orbits for electron path

Thomson
Hund
Rutherford
Sommerfeld

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Chemistry
When a bond is formed between two atoms, the energy of the system will

May increase or decrease
Remain the same
Increase
Decrease

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

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

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Chemistry
The coating of a thin layer of zinc on steel or iron objects is known as

Tinning
Galvanising
Hot dipping
Electroplating

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Chemistry
The most abundant rare gas in the atmosphere is

He
Ar
Xe
Ne

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