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Chemistry

Chemistry
The molecular formula of phosphorous is

P3
P1
P2
P4

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Chemistry
What is the atomic number of mercury

41
32
63
80

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Chemistry
Silver nitrate solution is kept in brown bottles in laboratory because

Brown bottles react with it
Brown bottles stops the passage of light through it
Brown bottles do not react with it
It reacts with ordinary white bottles

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Chemistry
Which of the following is chiefly present in LPG (Liquefied Petroleum Gas) ?

Butane
Propane
Ethane
Methane

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Chemistry
Rectified spirit is :

Methylated spirit
100% ethyl alcohol
Tincture iodine
95% ethyl alcohol

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Chemistry
Which of the following is the major constituent of LPG?

Ethane
Methane
Butane
Propane

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