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Chemistry

Chemistry
An atom of an element has atomic number 17 and mass number 36. The number of neutrons in its nucleus is

53
17
19
36

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Chemistry
In electro-refining, the pure metal is deposited on

Anode
Electrolyte
Cathode
Vessel

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Chemistry
Chemical formula of washing soda is

Na2SO4.10H2O
Na2CO3.10H2O
Ca(OH)2
NaHCO3

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Chemistry
The chemical formula of the laughing gas is

N2O3
NO
N2O
NO2

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Chemistry
The oxidation number of nickel in K4[Ni(CN)4] is

8
–4
4
Zero

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Chemistry
Cyanide poisoning causes death in seconds because

It causes cardiac arrest
It breaks the electron transport chain
It causes Lysis of red blood cells
It denatures enzymes of the heart/muscle

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