Question # 1

Which of the following species has unpaired electrons in antibonding molecular orbitals

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The distillation of coal at high temperature and in absence of air is called

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Vacuum distillation

Normal distillation

Fractional distillation

Destructive distillation

Hydrogenation of vegetable oils is accelerated by Ni catalyst. The catalytic activity of Bi is increased by a promoter of activator which is

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Na and K

Na and Hg

Hg and Zn

Cu and Te

Benzophenone can be converted into benzene using

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Fused alkali

Anhydrous AlCl₃

Sodium amalgam in water

Acidfied dichromate

Major food factors are:

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Fats and oils

Carbohydrates

Protiens

All of these

Which of the following hydrides has the lowest boiling point?

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H₂O

H₂S

H₂S3

H₂Te

When two hydrogen atoms approach each other.

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Forces of attraction operate.

Forces of repulsion operate.

Forces of attraction and repulsion operate simultaneously.

Nothing happens.

Selection of filter paper depends upon sizes of particles to be:

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Tested

^Filtered

Checked

All of above

Alkynes are colourless & odouless except

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Acetylene

Propyne

Butyne

Pentyne

The final product formed by distilling ethyl alcohol with excess of Cl₂and Ca(OH)₂is

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CH₃CHO

CCl₃CHO

CHCl₃

(CH₃)₂O

If a reactant or product of a reaction absorbs radiation, then physical method for determining the rate of reaction is

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Spectrometry

Refractometry

Conductivity measurement

Optical method

Charge of an electron is:

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1.6 x 10^-19 C

9.1 x 10^-34 C

1.7588 x 10¹¹ C

6.62 x 10^-34 C

Two or more similar monomers combine to form:

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Homopolymer

Copolymer

Ter polymer

Thermoplastic polymers

Silk is an example of

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Animal fiber

Vegetable fibre

Mineral fibre

None of these

What is chrome yellow?

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Pbo

Pb₂O

PbCrO₄

Pb₃O₄

The process in which solvent particles surround solute particles is called

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Hydrolysis

Hydration

Solvation

Dissolution

Who rejected the vital force theory

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Wholer

Fisher

Newton

Lewis

Electronegativity order of alkyl halides is:

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Rl > RBr > RCl > RF

Rbr > RCl > RF >Rl

RCl > RF >Rl > RBr

RF >Ri > RBr >RII

6-d series is in the period :

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4th

5th

6th

7th

Plastics are a pollution problem because many plastics

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Are made from petroleum

Are very inflammable

Burn to produce toxic fumes

Decompose to produce toxic products

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Reaction occurs at STP

Reaction is exothermic

Reaction is endothermic

Number of moles of production and reactant are same

Which of the following is the strongest acid?

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CF₃COOH

CBr₃COOH

CH₃COOH

CCl₃COOH

At room temperature formaldehyde is

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Gas

Liquid

Solid

None of the above

Which compound shows hydrogen bonding

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C₂H₆

C₂H₅CI

CH₃-O-CH₃

C₂H₅OH

The example of a photo chemical reaction is photosynthesis has order of reaction :

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1

2

0

3

What is wrong about transition metals?

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Diamagnetic

Paramagnetic

Form complexes

Shows variable oxidation state

Acetylene gives

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White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu(NO3)2

White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu2C12

White ppt. with both

Red ppt. with both

Which one of following is not monocyclic aromatic hydrocarbon

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Benzaldehyde

Benzoic acid

Benzene sulfonic acid

Biphenyl

α-Amino acids are found in protein. Which of the following is anα-amino acid

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Fossil fuels consist of :

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Coal

Natural gas

Petroleum

All of these

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0.12

0.50

0.25

4.00

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