Question # 1

Rusting of iron is catalysed by

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Fe

O₂

Zn

H⁺

Isopropyl alcohol on oxidation forms

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Acetone

Ether

Ethylene

Acetaldehyde

Saturated solution of NaCI on heating becomes

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Super saturated

Unsaturated

Remains saturated

None

Which of the following alkali metal hydroxides is the strongest base?

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LiOH

NaOH

KOH

CaOH

When electricity is passed through molten AI₂O₃ + Na₃AIF₆ and 13.5 gms AI are deposited,the number of faraday must be

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0.5

1.0

1.5

2.0

Which of the following substances is used as an antiknock compound?

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Tetraethyl lead

Lead tetrachloride

Lead acetate

Ethyl acetate

According to MO Theory the species O⁺₂ possesses

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Bond order of 2.5

Three unpaired electrons

Diamagnetic character

Stability lower then O₂

Cannizzaro reaction is not given by

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Trimethyl acetaldehyde

Acetaldehyde

Benzaldehyde

Formaldehyde

Which one of the following has the lowest boiling point?

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B

AI

Ga

Ti

Which is the most amphoteric?

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Na₂O

MgO

AI₂O₃

CaO

The bond angle H - O - H in ice is closest to

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120° , 28°

60°

90°

109°

Which of the following fluorides does not exist?

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NF₅

PF₅

AsF₅

SbF₅

The credit of discovering neutron goes to

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Rutherford

Langmuir

Chadwick

Austen

In crystal structure of sodium chloride, the arrangement of CI^-ions is

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Fcc

Both Fcc and bcc

Bcc

None of these

An endothermic reaction is one in which the reacting substances

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Have more energy than the products

Have less energy than the products

Have the same energy as the products

Are at a higher temperature than the products.

Hydrogen chloride molecule contains

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Covalent bond

Double bond

Co-ordinate bond

Electrovalent bond

Heating a mixture of sodium benzoate and soda lime gives

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Methane

Benzene

Sodium benzoate

Calcium benzoate

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.

Ascorbic acid is chemical name of

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Vitamin D

Vitamin A

Vitamin C

Vitamin B6

Which of the following mineral does not contain Al?

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Cryolite

Mica

Feldspar

Fluorspar

Al is more reactive than Fe but Al is less easily corroded than Fe because

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It is a noble metal

oxygen forms a protective reaction easily with water

Iron undergoes reaction easily with water

Fe form mono and divalent ions.

Heating a micture of sodium benzoate and soda lime gives

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Benzene

Methane

Sodium benzoate

Calcium benzoate

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