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Chemistry

Chemistry
Oxygen has (+) oxidation number only in

H2O (2)
OF2
N2O
C12O

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Chemistry
Which of the following is not present in RNA

Ribose
Phosphate
Thymine
Uracil

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Chemistry
The liquid waste from kitchens and baths, of residences is known as :

Domestic sewage
Storm water
Sullage
Refuse

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Chemistry
What material is used to make electric heater coil ?

Nichrome
Iron
Silver
Copper

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Chemistry
Of the following compounds of calcium, the one having highest covalent character is

CaF2
CaBr2
Cal2
Cacl2

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Chemistry
The main buffer system of the human blood is

H2CO3 - CO32-
H2CO3 - HCO3
CH3COOH - CH3COO-
NH2CONH2 - NH2CONH+

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