Question # 1

Reaction of acids with alcohols is also known as

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Esterification

Saponification

Alkalization

None

Carbon monoxide is pollutant as it

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Inactivates nerves

Inhibits glycolysis

Combines with oxygen

Combines with hemoglobin

The number of atoms contained in 11.2 L of SO₂ at S.T.P are

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3/2 x 6.02 x 10²³

2 x 6.02 x 10²³

6.02 x 10²³

4 x 6.02 x 10²³

If the solvent is inflammable for heating purpose we use

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Ice bath

Water bath

Wire gauze

Thermostat

Tollen's reagent is

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Ammonical cuprous chloride

Ammonical cuprous oxide

Ammonical silver bromide

Ammonical silver nitrate

Which of the following compounds has the lowest anion to cation size ratio?

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LiF

NaF

CsI

CsF

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

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120° , 28°

60°

90°

109°

Leblanc process is employed in the manufacture of

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Baking soda

Washing soda

Potash

Plaster of paris

Which is not a colligative property?

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Osmotic pressure

Lowering of vapour pressure

Depression of freezing point

Elevation of boiling point

Which of the following statements is most appropriate about effective nuclear charge? It depends upon

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The shielding constant

The atomic number

The charge on the nucleus

Both the nuclear charge and the shielding constant

Which is true for an element R present in group 13 of the periodic table?

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It is a gas at room temperature

It has oxidation state of +4

It forms R₂O₃

It forms RX₂

When quantity of electricity passed is one faraday then the mass deposited at the electrode is equal to

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One gm. atomic weight

One gm. equivalent weight

Electrochemical equivalent

None of the above

Reaction of ethylamine with chloroform in alcoholic KOH produces

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CH₃OH

CH₃NC

C₂H₅NC

C₂H₅CN

The IUPAC name of the compound having the formula (CH₃)₃C - CH = CH₂is

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1, 1-Dimethyl-3-butene

1, 1, 1-Trimethyl-3-propene

3, 3,-Dimethyl-1-butene

3, 3, 3,-Trimethyl-1-propene

The isomers due to the unequal distribution of carbon atoms on either side of the functional group belonging to the same homologous series are called

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Functional isomers

Position isomers

Chain isomers

Metamers

The maximum number of electrons in a subshell for whichι = 3 is

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14

10

8

4

Ascorbic acid is chemical name of

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Vitamin D

Vitamin A

Vitamin C

Vitamin B6

The number of atoms in 0.004 g of magnesium is close to

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24

2 x 10²⁰

10²⁰

6.02 x 10²³

Saturated solution of NaCl on heating becomes

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Super saturated

Unsaturated

Remains saturated

None

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

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Tetraethyl lead

Lead tetrachloride

Lead acetate

Ethyl acetate

Octane number can be changed by

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Isomerisation

alkylation

Cyclisation

All of these

The heat evolved in combustion of rhombic and monoclinic sulphur are -70960 and -71030 cal mol^-1respectively. What will be heat of conversion of rhombic sulphur to monoclinic?

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70960 calories

71030 calories

-70 calories

+70 calories

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