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Chemistry

Chemistry
The major use of sulphur is in the manufacture of

H2S
H2SO4
Fungicide
SO2

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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 :

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

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Chemistry
The molecular mass of a gas is

Twice its vapour pressure
Half its vapour pressure
Equal to its vapour pressure
Not related to its vapour pressure

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Chemistry
Litmus is obtained from

A fungus
Lichen
An alga
A bacterium

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Chemistry
Ozone saves the biosphere by absorbing high energy radiations called ________ .

X–rays
Gamma rays
Ultraviolet rays (UV)
Infra-red (IR)

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Chemistry
Which one of the following metals is used to galvanise iron ?

Copper
Lead
Mercury
Zinc

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