Question # 1

Octane number is zero for

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n-Heptane

Isooctane

n-Hexane

Isoheptane

In which molecule carbon atom is sp² hybridized

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CH₄

C₂H₄

C₂H₂

None of the above

Atmosphere of big/metropolitan cities is polluted most by

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Automobile exhausts

Pesticide residue

Household waste

Radio-active fall out

The alkali metal which is liquid at 15°C is

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K

Cs

Na

None

Natural fertilizer from plants and animals provide nitrogen

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1.5 kg

3.0 kg

4.5 kg

6 kg

At 500 K the equilibrium constant for reaction cis-C₂H₂CI₂ trans-C₂H₂CI₂ is 0.6. At the same temperature the equilibrium constant for the reaction trans-C₂H₂CI₂ cis-C₂H₂CI₂ will be

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0.60

1.67

0.66

2.6

Which of the following has greatest reducing power?

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HI

Hbr

HCI

HI

Which one of the following elements occurs free in nature?

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N

P

As

Sb

The addition of HBr is easiest with

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CH2 = CHCI

CICH = CHCI

CH3 - CH = CH2

(CH3)2 C = CH2

Potassium is kept in

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Water

Ammonia

alcohol

Kerosene

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

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LiF

NaF

CsI

CsF

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