Question # 1

Which one of the following is an aromatic compound?

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Benzene

Thiophene

Furan

All of them

Covalent solids are composed of

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Ions

Different molecules

Neutral atoms

Diethyl ether

Spectrometry method is applicable if a reactant or a product absorbs radiation

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Ultraviolet

Visible

Infrared

Any of these

Which one of the following elements is the strongest reducing agent?

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Chlorine

Sodium

Magnesium

Aluminium

Which one of the following is a water soluble vitamin?

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niacin

riboflavin

tyrosine

ascorbic acid

Which will not react with phenol

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NaOH

Br2

KMn04/OH-

Na

A fibre which is made from acrylonitrile as monomer

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PVC

rayon fibre

acrylic fibre

polyester fibre

solubility of carboxylic acids decreases in water with increase in molar mass because

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Bigger molecules are more polar

bigger molecules have bigger non-polar groups

bigger molecules make more hydrogen bonds

bigger molecules can form lesser hydrogen bonds/molecule

Butane molecule can have maximum no of isomers

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2

5

4

3

What is distilled first?

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Liquid CO₂

Liquid N₂

Liquid O₂

Liquid H₂

Which is the correct order of boiling points

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structure of ice

solution of ethanol in water

solution o fNaCl in benzene

linking of helix protein molecule

(CH₂O)_nis general formula for

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Monosaccharides

Oiligosaccharides

Polysaccharides

None of these

which one of the following is not a nucleophile?

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H₂O

H₂S

BF₃

NH₃

The amount of Ni in stainless steel is

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3%

4%

5%

8%

Macromolecules are

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organic molecules

High molecular mass molecules

Natural compounds

Rarely occurring molecules

If the radius of first Bohr orbit be a_o, then the radius of third Bohr orbit would be

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3 x a_o

6 x a_o

9 x a_o

1/2 x a_o

In which of the following theories the hybridizationis considered

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Vsepr

Lewis

Molecule orbital

Valence bond

On heating glycerol with conc. Sulphuric acid a compound with unpleasant odour is obtained. The compound is

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Methyl alcohol

Formic acid

Prop-2-enal

Glycerol sulphate

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.

Which of the following has zero depole-moment?

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CIF

PCl₃

SiF₄

CFCl₄

Spontaneous reaction is such in which the system decreases its ______

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Energy

Free energy

Entropy

All

Clemensen's reduction of ketones is carried out in

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H₂with Pd catalyst

Glycol with KOH

LiAIH₄in water

Zn-Hg with conc. HCl

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