Question # 1

Which is biopolymer?

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Plastic

Rubber

synthetic fiber

Lipid

Enthalpy of a reaction can be measured by

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Glass calorimeter

Barometer

Manometer

Thermometer

Which of these polymers is a synthetic polymer

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Starch

Animal fat

Polyester in an addition polymer

Cellulose

A student put two eggs A and B in HCL solution, After five minutes he took them out for weighing but egg dropped in water accidentally. The student was able to take it out after 30 minutes, He weighed it, Its weight was 40.33g. Weight of egg B was also 40.33g. Teacher told him that if both eggs have been dropped in water, the weight of egg B would have been:

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equal to that of egg A

less than that of egg A

greater than that of egg A

unaffected instead

The structure of a polymer depends upon how the monomer-repeating unit joins to makes a polymer, What is not the type of structure of a polymer?

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synthetic polymer

linear polymer

branched

cross linked or inter connected polymer

C₆H₁₂O₆is molecular formula of:

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Glucose

Dextrose

Fructose

All of these

At different temperature, the vapour pressure of water is

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different

same

low

high

Separation of low molecular weight protein from high one is

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Dialysis

Cromotography

Electrophoiesis

Ultracentrifugation

If V₁= 5 litres, P₁= 2 atm, T₁= T₂= 273°C and V₂= in liter

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5

80

125

10

The partial pressure of gas can be calculated if we know total pressure of mixture and:

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Number of protons

Number of electrons

Number of neutrons

Mole fraction of gases

The temperature below which a gas does not exist is called its

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Inversion temperature

Critical temperature

Neutral temperature

Curie point

When methane reacts with Cl₂in the presence of diffused light the products obtained are?

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Chloroform only

Carbon tetrachloride only

Chloromethane and dichloromethane

Mixture of a,b,c

If the rate of reaction is independent of the concentration of the reactant, the reaction is of

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Zero order

First order

Second order

Third order

The ionic bonds are

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Unidirectional

Bi-directional

Non-directional

Multi-directional

Which of the following brings about the conversion of starch into maltose

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Maltase

Zymase

Diatase

Invertase

acetylene can be converted into-while passing through a Cu-tube at 300°C:

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Glyoxal

Vinyl acetylene

Vinyl alcohol

Benzene

Which one of the following elements is not present in all proteins?

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Carbon

Hydrogen

Nitrogen

Sulphur

DDT is

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Biodegradable pollutant

Nondegradable pollutant

Not a pollutant

An antibiotic

Which of the following sets of atomic numbers belong to that of the alkali metals?

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1,12,30,4,62

37,19,3,55

9,17,35,53

12,20,56,88

According to MO Theory, the species O₂+ possesses

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bond order of 2.5

three unpaired

diamagnetic character

stability lower then O₂

Which of the following elements is most metallic?

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P

As

Sb

Bi

Which of the following has magnesium?

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Carbonic anhydrase

Haemocyanin

chlorophyll

Vitamin B₁₂

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