Question # 1

Which of the following molecules have a permanent dipole

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CH₄

CHCl₃

CCl₄

CO₂

Liquids evaporate at every temperature. When the temperature becomes constant for a liquid, then:

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rate of evaporation is greater than the rate of condensation

the rate of condensation is greater than the rate of evaporation

The rate of condensation and evaporation become equal

it depends upon the nature of the liquid

The existence of a substance in more than one solid modification is known as

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Isomorphism

Polymorphism

Amorphism

None of these

Which of the following best describes the shape and polarity of the carbon disulphide molecule?

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Bent and polar

Linear and non-polar

Pyramidal and polar

Bent and non-polar

What will be the pH of 1.0 mol dm -3 of H2X, which is only 50% dissociated

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1

0

2

Less than 0

One of the following metals is the most reactive and form super oxide. Indicate that

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Mg

K

Be

Li

Which of the following is the repeating monomeric unit in cellulose?

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sucrose

maltose

cellobiose

glucose

Which noble gas is used in mixture used for breathing by divers?

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Ge

Ar

Kr

He

Which is not an essential amino acid

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Leucine

Methionine

Histidine

Lysine

Which one of the following is not an alicyclic compound?

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Cyclohexene

Cyclohexane

Benzene

Cyclopentane

Which of the following carbohydrates is used in silvering of mirrors

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Sucrose

Cellulose

Fructose

Glucose

When potassium metal is exposed to violet light

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Ejection of electrons takes place

Ejection of some potassium atoms occurs

There is no effect

The absorption of electrons takes place

The protein which only yield amino acids and their derivatives

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Simple proteins

Complex proteins

Derived protein

All of these

To differentiate isomers we use

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n-

iso-

neo

All of them

Glycine at pH7 has the structure

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H₂N -- CH₂-- COOH

H₃N⁺-- CH₂-- COOH

H₂N -- CH₂COO^-

H₃N⁺-- CH₂-- COO^-

Strong reducing agents gave

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Greater positive value of standard reduction potential

Greater negative value of standard reduction potential

Lesser positive value of standard reaction potential

None of these

The amount of oxygen in the lithosphere is about

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35.50%

40.60%

56.60%

50.50%

Which of the following does not reflect the periodicity of elements?

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Bonding behaviour

Electronegativity

Ionisation potential

Neutral/proton ratio

The covalent radius of Cl atom is:

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99.4 pm.

176.7 pm

38 pm

76 pm.

Carboxylic acids having carboxyl group one is called:

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Mono carboxylic acid

Di-carboboxylic acid

Tri carboxilic acid

Tetra carboxylic acid

Th IUPAC name of the compound having formula (CH3) 3 C - CH = CH2 is

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1, 1-Dimethyl-3-butene

1,1,1-Trimethyl-3-propene

3,3,-Dimenthyl-1-butene

3,3,3,-Trimethyl-1-propene

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32

64

16

4

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