Question # 1

The acid used in lead storage cells is

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Phosphoric acid

Nitric acid

Sulphuric acid

Hydrochloric acid

Which one of the following elements occurs free in nature?

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N

P

As

Sb

Causticisation process is used for the preparation of

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Caustic soda

Caustic potash

Baryata solution

Slaked lime

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 halide.

Which of the following statements is correct with respect to the property of elements with increase in atomic number in the carbon family (group 14)?

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Their metallic character decreases

The stability of +2 oxidation state increases

Their ionization energy increases

Their atomic size decreases

Which of the following possesses the highest melting point?

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Chlorobenzene

o- Dichlorobenzene

m-Dichlorobenzene

p-Dichlorobenzene

Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBH₄or LiAIH₄?

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1-Propanol

2-Propanol

2-Methyl-2-propanol

Ethanol

Which one of the following has the lowest boiling point?

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B

Al

Ga

Ti

The reagent which forms crystalline osazone derivation when treated with glucose is

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Fehling solution

Phenyl hydrazine

Benedict solution

Hydroxyl amine

Inter molecular forces in solid hydrogen are

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Covalent forces

Van der Waal forces or London dispersion forces

Hydrogen bonds

All of these.

Which of the substances Na, Hg, S, Pt and graphite can be used as electrodes in electrolytic cells having aqueous solution?

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Na, Pt and graphite

Na and Hg

Pt and graphite only

Na and S only

Covalent compounds are soluble in

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Polar solvents

Non-polar solvents

Concentrated acids

All solvents

Which of the following has least mass?

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2 gram atom of nitrogen

3 x 10²³atoms of C

1 mole of S

7.0 g of Ag.

If a salt bridge is removed electrode is made from which of the following?

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ZnCl₂

CuSO₄

Hg₂Cl₂

HgCl₂

Bell metal is an alloy of

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Cu, Zn and Sn

Cu, Zn and Ni

Cu and Zn

Cu and Sn

Natural fertilizer provides potassium in the form of K₂O (potash)

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1.5 kg

3 kg

4.5 kg

6.5 kg

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