Question # 1

The reference calomel electrode is made from which of the following?

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ZnCI₂

CuSO₄

Hg₂CI₂

HgCI₂

Which inorganic precipitate acts as semipermeable membrane?

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Calcium sulphate

Barium oxalate

Nickel phosphate

Copper ferrocyanide

Vitamin A is present in

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Liver

Milk

Green vegetables

All

In which of the following elements +1 oxidation state is more stable than +3

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B

AI

Ga

Ti

Oleum is

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Castor oil

Oil of vitriol

Fuming of H₂SO₄

None of them

The reaction/method that does not give an alkane is

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Catalytic hydrogenation of alkanes

Wurtz reaction

Hydrolysis of alkyl magnesium bromide

Dehydrohalogenation of an alkyl halid.

Which of the following pairs are chemically dissimilar?

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Na and K

Ba and Sr

Zr and Hf

Ca and Zn

In a crystal a ≠ b ≠ c, a = γ = 90° and β ≠ 90°, it is

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Monoclinic

Rhombic

Trigonal

Tetragonal

The wire in the flash bulbs is made up of

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Mg

Ba

Cu

Ag

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