Question # 1

Increase viscosity of proteins is due to

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Denaturation

Isoelectric point

Both

None

Van der Waal's forces exist in

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Polar compounds

Non-polar

Covalent

All types of atoms and molecules

Boron, aluminium, gallium, indium and thallium belong to group lll-A of the periodic table show a decrease with increasing relative atomic mass:

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Ionic character of the compounds

The first ionization energy

The basic character of the oxides

The stability of +2 oxidation

The solid particles posses only ______ kinetic energy

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Translational

Rotational

Viberational

Circular

Equal volume of all gases at same temperature and pressure contain number of molecules

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different

multiples

equal

in fractions

Alkaline phosphatese is associated with ______ disease

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Heart disease

Rickets

Diabtese

None

Two moles of an ideal gas at 1 atm are compressed to 2 atm at 273 K.The enthalpy change for the process is

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2 litre atm

1 litre atm

Zero

3 litre atm

The total pressure exerted by a mixture of gases is the sum of the partial pressure of all the gases present is a statement of

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Charle's Law

Boyle's Law

Dalton's Law

Graham's Law

If increase in temperature and volume of an ideal gas is two times, then the initial pressure P changes to

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4P

P

2P

3P

Biological oxygen demand (BOD) is associated with

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Organic matter

Micro organisms

Both a and b

None

The heat of hydrogenation of most of the alkene is about

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120 kJ/mol

100 kJ/mol

140 kJ/mol

105 kJ/mol

In 1000 molecules of 0.001 M acetic acid the number of H⁺ions is 12.6, then its percentage of ionization is

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1.33%

1.26%

12.6

1%

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1st order

2nd order

Zero order

3rd order

Which reagent will distinguish a ketone from an aldehyde

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Br₂

2, 4-dinitrophenylhydrazine

NaBH₄

Tollen's reagent

A filtration process could be very time consuming if it were not aided by a gentle suction which is developed:

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If the paper covers the funnel up to its circumstances

If the paper has got small sized pores in

If the stem of funnel is large so that it dips in to filtrate

If the paper fits tightly.

Which element among the following belongs to Group IV-A of the periodic table?

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Barium

Iodine

Lead

Oxygen

Smallest charge of electricity that has been measured so far is

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Charge on a-rays

Charge on electron (1.602 x 10^-19C)

Charge on x-rays

Charge on gamma rays

Freezing point depression is measured by

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Beckmann's apparatus

Lands Berger's method

Antifreeze apparatus

All of the above

Out of 110 known elements, transition elements are

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40

60

50

80

The reaction-method that does not give an alkane is

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Catalytic hydrogenation of alkanes

Wurtz reaction

Hydrolysis of alkyl magnesium bromide

Dehydrohalogenation of an alkyl halide

Which one of the following reaction rate is effected by the light

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pH of water is 7, if 0.01 M NaOH is added, than its pH is

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12

14

zero

10

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