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Chemistry

Chemistry
The number of waves in n x 10th Bohr's orbit are

n
n3
n2
n-2

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Chemistry
The chemical name of 'laughing gas' is

Nitric oxide
Nitrous oxide
Nitrogen dioxide
Nitrogen pentoxide

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Chemistry
The heaviest naturally occurring element is:

Mercury
Thorium
Uranium
Polonium

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Chemistry
PH value between 6.5-7.5 makes the soil

Neutral
None of these
Basic
Acidic

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

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Chemistry
Commonly used antiseptic 'Dettol' is a mixture of

O-chlorophenoxylenol + terepineol
O-cresol + terepineol
Phenol + terepineol
Chloroxylenol + terepineol

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