Question # 1

Steam causes more seers burns than boiling water. It is due to

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Latent heat of fusion

Latent heat of vaporization

Latent heat of sublimation

All of above

Super conductors are derived from compounds of

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P-block elements

Lanthanides

Actinides

Transition elements

How many kinds of space lattices are possible in a crystal?

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23

7

230

14

ΔH° represent the enthalpy change at

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0°C and 1 atm pressure

25°Cand 1atm

0K and I atm pressure

25°C and 2 atm pressure

A crystal system in which all three angles and all three edges are different is called

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triclinic

rhombohedral

cubic

hexagonal

With increase in temperature, ionic product of H2O

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Decreases

Remains same

Increases

May increase or decrease

The conversion of molecules of A to B follows a second order kineties. Doubling the concentration of A will inerease the rate of formation of B by a factor of

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2

4

1/2

1/4

Which of the following statements is false?

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Avogadro number = 6.02 x 10²¹

The relationship between average velocity (v) and root mean square velocity (u) is v = 0.9213 u

The mean kinetic energy of an ideal gas is independent of the pressure of the gas

The root mean square velocity of the gas can be calculated by the formula (3RT/M)^1/2

One of the following does not give the flame test. Which is that

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Sr

Bа

Be

Na

Acceptance of macromolecular hypothesis was due to efforts of:

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Kekule

Gibbs

Standiger

anderson

When a compressed gas is allowed to expand into a region of low pressure, it produce:

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Vapours

Cooling effect

Heating effect

None of above

Acetamides are formed by the reaction of carboxylic acids with

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Acids

Bases

Salts

NH₃

Which one of the following substance is no used as drying agent in desiccators

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Silica gel

CaCl₂

Phosphorous

NaCL(50%)

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

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Carbon

Hydrogen

Nitrogen

Sulphur

Isotonic solutions have same

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Molar concentration

Molality

Normality

None of these

Which is not the condition for the formation of smog

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There must be sufficient NO gas

There must be sunlight to help photo chemical reaction to take place

Air must be blowing swiftly

There must be SO₂in the air

The number of amino acids found in proteins that a human body can synthesize is

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20

10

5

14

Red P can be obtained form white P by

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Heating it with a catalyst in an inert atmosphere

Distilling it in an inert atmosphere

Dissolving it in CS₂and crysllizing

Melting it ad pouring the liquid into water

Lactic acid on heating with dil. H₂SO₄gives

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Acetic acid

Propionic acid

Acrylic acid

Formic acid

The percentage of H is the highest in

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CH₄

NH₃

H₂SO₄

C₆H₁₂O₆

If the value of azimuthal quantum number is 3, then values of m the magnetic quantum no. will be

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0, 1, 2, 3

+3, +2, +1, -1, -2, -3

0, -1, -2 ,-3

-3, 0, +3

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Diastase

Lipase

Inverters

Zymase

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