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Chemistry

Chemistry
Oxygen has (+) oxidation number only in

OF2
N2O
H2O (2)
C12O

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Chemistry
Which one of the following organic compound is used to remove stains of iron compounds?

Oxalic acid
Phthalic acid
Benzoic acid
Cinnamic acid

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Chemistry
The Fungus which is used in the alcohol industry is

Candida Aibicans
Mushroom
Rhizopus
Yeast

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Chemistry
The constituents of automobile exhaust that can cause cancer is/are :

Carbon monoxide
Lead
Polycyclic hydrocarbons
Oxides of nitrogen

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Chemistry
Which gas is used for converting vegetable oils into saturated fats ?

SO2
Cl2
H2
O2

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Chemistry
Which amidst the following is not a gem stone ?

Cat's-eye
Topaz
Opal
Pearl

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