Question # 1

Equal volumes of ideal gases contain equal number of molecules at:

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Same temperature

Same pressure

Same environmental conditions

Both (A) and (B)

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

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5

80

125

10

It is very much difficult to cook food at Mount Everest, because

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temperature of atmosphere is very low

the boiling point of water is 69°C

water becomes heavier

the boiling point of water is increased

A fat or oil is characterised for extent of unsaturation by one of the following number,which one

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rancidity number

acid number

iodine number

saponicfication number

The temperature of a gas is directly proportional to its

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average translational kinetic energy

enthalpy

internal energy

hydration energy

Prosthetic groups are

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helical structures in protein

sulphur containing parts of protein

non-protein parts in compound proteins

sites for hydrogen bonding

The %age of nitrogen in urea is:

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46

60

70

80

If the pressure of gas reduced to one half and temperature is increased twice then density of gas will be

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4 times

2 times

1/2 times

1/4 times

Plastic are 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 product

The volume of a gas that is occupied by its one mole at S.T.P. is known as:

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atomic volume

molar volume

normal volume

total volume

Which of following is oxidation state of oxygen in peroxides?

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-2

1/2

-1

+2

Which of the following isoelectronic ions has the lowest ionization energy?

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K⁺

Ca²⁺

Cl^-

S^2-

The common name of propanoic acid is

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Acetic acid

Formic acid

Propionic acid

Butyric acid

the unreactivity of alkanes is based upon

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Inertness of sigma bond

Non-polarity of the bonds

Both A and B

None of above

Simple sugars are :

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Monosacchrides

Disaccharides

Oligo saccharides

Trisaccharides

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Increases

Decreases

Remains same

Cannot be predicted

Which of the following will be good conductor of electricity

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Pure distilled water

Molten NaCl

Dilute solution of glucose

Chloroform

Which gas is not a constituent of atmosphere

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Xe

O₃

H₂

F₂

Which enzyme is not involved in fermentation of strach

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Diastase

Zymase

Urease

Invertase

Polyanion formation is maximum in

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Nitrogen

Oxygen

Sulphur

Boron

The heat energy change during a chemical reaction at constant pressure and at a given temperature is called

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Change in internal energy

Enthaply change

Temperature change

Work done by the system

In cold countries ethylene glycol is added to water in radiators of cars during winter. It results in

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Lowering in b.pt

Reducing viscosity

Reducing specific heat

Lowering in freezing pt

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