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Chemistry

Chemistry
White phosphorus is always kept under

Benzene
Ether
Kerosene
Water

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Chemistry
Denatured spirit is ethanol mixed with

Kerosene
Petrol
Pyridine
Water

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

–4
Zero
8
4

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Chemistry
Sulphur dioxide bleaches colouring matter by :

Reduction
Oxidation
Decomposition
Dehydration

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Chemistry
Which of the following has pH value 7?

Pure Water
HCl
Sodium Carbonate
H2SO4

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Chemistry
Concentration of a material which is lethal to 50% animal is called

ADI
NOAEL
LD50
LC50

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