Question # 1

In graphite crystal, carbon is

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sp hybridized

sp²hybridized

sp³hybridized

None

The synthesis of ethene from ethyl alcohol is a reaction

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Dehydration

Polymerization

Addition

Substitution

What is the weight of 10 dm³of CO₂at 27°C and 2 atm?

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89.3 g

56.1 g

125 g

127 g

The B.P of glycerine at 760 torr pressure is

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200°C

290C°

250C°

262C°

To cook the food at a high mountain is difficult as compared to at sea level. The reason is that:

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the temperature at the top of the mountain is low

the density of water decreases at the mountains

the boiling point of water decreases at the mountain

the hydrogen bonding in water changes with the change of height

Areal gas obeying Van der Waal's equation will resemble ideal gas ilf the:

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both a and b are large

both a and b are small

a is small and b is large

a is large and b is small

Which of the following liquid has higher boiling point?

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HCl

HBr

H₂O

Br₂

In MgCl2, the oxidation state ofCI is

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Zero

-2

+2

-1

2,5-dimethyl-1-hexene has

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Two sp2 hybridized carbons

Six sp2 hybrid carbons

Two double bonds

Four pi electrons

The enthalpy change AH of a process is given by the relation

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ΔΗ =ΔΕ + P∆V

ΔH=ΔE +W

ΔH =ΔΕ-ΔnRT

ΔΕ =ΔΗ + P∆V

Proteins loose their ability to work

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by slight heating

by change in structure

by slight cooling

when inside the body

When electron jumps from n₂= 2,3,4,5,.... orbit to n₁= 1 orbit in the hydrogen atom, the radiations emitted give the spectral lines

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Lyman series

Blamer series

Paschen series

Brackett series

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With H₂/Ni CH₃(CH₂)₅CH₂OH

With H₂/Ni CH₃(CH₂)₅CH₃

With NaBH₄ CH₃(CH₂)₅CH₂OH

With NaBH₄ CH₃(CH₂)₅CHO

In which of the following cases, the reaction goes farthest to completion

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K = 10³

K = 10^-2

K = 10

K = 10⁰

The heat of formation of SO₂(g) is -70.9 Kcal. The energy required for the decomposition of 1 mole of SO₂(g) is

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35.50 Kcal

70.9 Kcal

141.8 Kcal

-35.9 Kcal

Reduction of aldehydes with HI and P gives

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Primary alcohols

Secondary alcohols

Alkanes

Tertiary alcohols

Azeotropic mixture of HCl and water has

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48% HCl

22.2% HCl

36% HCl

20.2% HCl

The size of electronic shell is described by

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Azimuthal Q. no

Magnetic Q.No

Spin Q. No

Principle Q. No

Oceans cove ______ percent of the surface of the earth

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60

70

80

97

The heat contents of all the elements in their standard states are taken to be

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1

2

0

None

The organic compounds containing Ph--OH group are called:

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Phenol

Aldehyde

Ketones

Carboxylic acids

Which gas is not a constituent of atmosphere

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Xe

O₃

H₂

F₂

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