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Chemistry

Chemistry
Which one of the following nonmetals shows allotropy in the liquid state?

Phosphorous
Carbon
Sulphur
Bromine

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Chemistry
Carbon monoxide is an inflammable gas. Which one of the following is also inflammable?

Oxygen
Helium
Hydrogen
Nitrogen

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Chemistry
________ gives hardness to stainless steel.

Zinc
Carbon
Lead
Tin

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Chemistry
Which of the following elements is found in all organic compounds

Carbon
Nitrogen
Calcium
Oxygen

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Chemistry
Which of the following elements is non-radioactive ?

Plutonium
Uranium
Zirconium
Thorium

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Chemistry
If the equilibrium constants for the systems H2 + I2 ? 2HI and 2HI ? H2 + I2 are K1 and K2 respectively, the relationship between K1 and K2 is :

K1 = 2K2
K1 = K2
K1 = K2/2
K 1 = 1 /K2

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