Question # 1

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The bond order of individual C - C bond is benzene is

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One

Two

Between one and two

One and two alternately

Alkanes normally have ______ hybridization

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Sp

Sp²

Sp³

d sp³

The orbitals having n + l = 5 are

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2p, 3d,3s

3p, 3d, 5s

3s, 4p, 4d

5s, 4p, 3d

______ is used in breathing equipments for mountaineers and in space craft

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Li₂O

BeO

N₂

KO₂

Optical rotation method is sued when

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Reaction involve ions

Change of refractive indices

Reactions involving change of optical activity

None of the above

Alcohol reacts with halogen acid to produce

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Alkyl halides

Aldelydes

Ketones

Alkanes

Which of the following gases is used for illuminating purpose?

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Methane

Ethane

Propane

Butane

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Electrophilic substitution

Free radical reduction

Isomerisation

Nucleophilic substitution

Ethyl acetate is obtained when methyl magnesium iodide reacts with

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Ethyl formate

Ethyl choroformate

Acetyl chloride

carbondioxide

The atomic radius of hydrogen is 37

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Pecometer

Manometer

Angstrom

Micrometer

For a given process the heat change at constant pressure q_pis related to the heat change at constant volume (q_v) according to

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q_p= q_v

q_p< q_v

q_p> q_v

q_p= qv/2

In azeotropic mixture showing negative deviation form Raoult's law show

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Higher b.p. than either

Lower b.p. than either

No change in b.p.

None of these

The order of frequency of the following radiations unltraviolet, visible, infrared and microwave is

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Microwave > infrared > visible > ultraviolet

Visible > ultraviolet > microwave > infrared

Ultraviolet > visible > infrared > microwave

Infrared > microwave > ultraviolet > visible

The other name of cross linked polymers is

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Linear polymer

Branched polymer

Inter connected polymers

None of these

What are the products electrolysis of aqueous sodium chloride at two electrodes

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Chlorine at anode and oxygen at cathode.

Hydrogen at anode and chlorine at cathode.

Chlorine at anode and hydrogen at cathode.

Chlorine at anode and sodium at cathode.

Which of the following compounds is explosive in nature?

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Phosphorus trichloride

Nitrogen trichloride

Hyponitrous acid

Nitrosyl chloride

Which of the following is a carbonate are?

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Pyrolusite

Malchite

Diaspore

cassiterite

As a fixing agent in photography, sodium thisoulphate is used for

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Dissolving out unreacted silver bromide

Converting silver

Reducing solubility of AgBr

Preventing overdeveloping and fogging

How many cm³of 1 M H₂SO₄required to neutralize 10 cm³of 1 M NaOH

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2 cm³

2.5 cm³

5 cm³

10 cm³

Which of these polymers is an addition polymer

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Nylon 6,6

Polystyrene

Terylene

Epoxy resin

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Pent -1-ene-3-yne

2-pentyne-4-ene

1-pentene-3-yne

Pent-2-yen-4-ene

The vapour pressure of two liquids 'p' and 'Q' are 80 and 60 torr respectively. The total vapour pressure of solution obtained by mixing 3 mole of P and 2 mol of Q would be

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140 torr

20 torr

68 torr

72 torr

A suitable solvent should dissolve maximum amount of solute at its boiling point and minimum amount at :

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Freezing point.

Room temperature.

Boiling point.

Sea level temperature.

Orlon is a polymer of

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Tetrafluoroethylene

Acrylonitrile

Ethanoic acid

Benzene

The formula of ketone is

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None of these

Same amount of electric current is passed through solutions of AgNO₃and HCl. If 1.08 g of silver is obtained in the first case, the amount of hydrogen liberated as S.T.P in the second case is

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112 cm³

22400 cm³

224 cm³

1.008 g

The rotation of two carbon atoms joined by double bond would happened only if

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Pi bond is broken

Sigma bond is broken

Both bonds are broken

None of above

which enzyme is not involved in the fermentation of starch ?

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Diastase

Zymase

Urease

Invertase

The art of electroplating was given by

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Faraday

Edison

Thomas Gradam

Brugan

During a chemical reaction heat may be

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absorbed

Evolved

Both evolved and absorbed

None of these

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