Question # 1

Estyl butyrate has flavour like

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Banans

Jasmine

Pineapple

Orange

The gases law describe the ______ Behaviour of gases

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Variable

Constant

Uniform

Best

Which of the following is not a postulate of the kinetic theory of gases?

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when gas particles collide, their total kinetic energy increases

gases consist of molecules in a constant state of random motion

when gas particles collide their total kinetic energy does not change at all

The gas particles travel in straight lines unit they collide with one another or with the walls of the container

Change in enthalpy (∆H) of a system can be calculated by

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∆H=∆E - PV

ΔH =ΔE +q

∆H = ∆E - q

∆Η = ΔΕ + P∆V

Which one of the following statements about melting point of metals is true?

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sodium has a lower melting point than potassium

sodium has a higher melting point than magnesium

potassium has a higher melting point rubidium

lithium has a lower melting point than sodium

Protein of high biological value

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Contains essential amino acids

Is poor in essential amino acids

Is of plant source

Contains amino acid glycine e. Is a basic protein

The deviation of a gas from ideal behavior is maximum at:

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-10∘C and 5.0 atm

-10∘C and 2.0 atm

100∘C and 2.0 atm

0∘C and 2.0 atm

The derivatives that cannot be prepared directly from the acetie acid

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Acetamide

Acetic anhydride

Ethyl acetate

Ester

Which of these polymers is a synthetic polymer

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Starch

Animal fat

Polyester in an addition polymer

Cellulose

Total number of valence electrons in phosphonium ion (PH4-) is

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8

9

12

10

A solid has a sharp melting point slightly above room temperature and is a poor thermal and electrical conductor, its crystal classification by bond type is

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Ionic

Metallic

Molecular

Covalent

Monosaccharides belong to the group

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Lipids

Fats

Proteins

Carbohydrates

If the rate of decay of radioactive isotope decreases from 200 cpm to 25 cpm after 24 hours, what is its half life :

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8 hours

6 hours

4 hours

3 hours

Which of the following is used as disinfectant

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K₂Cr₂O₇

KMnO₄

K₂MnO₄

K₂CrO₄

The temp. and pressure used for PVC polymerization is

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10°C and 10 atm

20°C and 20 atm

52°C and 9 atm

100°C and 10 atm

Which is not carboxylic acid with pungent smell?

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Formic acid

Acetic acid

Ethanoic acid

Butyric acid

Coal is obtained from dead remains of

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Plants

Animals

Both a and b

None

Hydrogenation of bezoyl chloride in presence of Pd on BaSO₄gives

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Benzyl alcohol

Benzaldehyde

Benzoic acid

Phenol

The electron releasing effect of methyl group is significant and it makes ring a good

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Electrophilic

Nucleophilic

Nucleophobic

Hydrophobic

In exothermic reaction decrease in potential energy of the products will result in

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Decreases in kinetic energy of the particles

Increases in kinetic energy of the particles

No change in kinetic energy

Decreases in activation energy

Which of the following element's outermost orbits last electron has magnetic quantum number m=0?

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Na

O

Cl

N

Catalytic oxidation of alkanes is used for the preparation of

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Adehydes

Fatty acid

Carbonyylic acids

Ketones

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