Question # 1

For incineration temperature range is (in ^oC)

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700-800

800-900

900-1000

1000-1100

Elements of II-A group are called alkaline earth metals due to the reason that

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they occur in earth only

they form divalent cations only

they have ns2 electronic configuration

their oxides and hydroxides are alkaline in nature and metals are present in earth crust

Liquids evaporate at every temperature. When the temperature becomes constant for a liquid, then:

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rate of evaporation is greater than the rate of condensation

the rate of condensation is greater than the rate of evaporation

The rate of condensation and evaporation become equal

it depends upon the nature of the liquid

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

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5

80

125

10

Which of the following is Homopolymer

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Polyvinyl acetate

Acrylic resin

Polyester resins

Both A and C

For an ideal gas,number of moles per litre in terms of its pressure P,gas constant R and temperature T is

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PT/R

PRT

P/RT

RT/P

Which factor is helping to reduce the environmental pollution

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Urbanization

Industrialization

Increase of plantation

Rapid growth of population

Terylen fibre is made by reaction of terephthalic acid with

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ethylene

ethylene glycol

glycol

terylene

The kinetic energy of three moles of gas is:

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3/2 RT

3 RT

1/2 RT

2 RT

Hydrolysis of alkyl nitriles gives:

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Alkane

Alkyl halide

Alkyl nitride

Minerals acids & Alkalies

1, 3, 5-Pentanetriol has secondary carbon

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3

1

2

Zero

The oxides of electronegative elements are

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Basic

neutral

Acidic

Amphoteric

Ammonium nitrate fertilizers is not used for which crop?

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Cotton

Wheat

Sugar-cane

Paddy rice

Half life period of a reaction is inversely proportion to the initial concentration of the reactant, then order of reaction is

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Third order

Second order

Fist order

Zero order

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.

Hemoglobin contains nearly:

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10,000 atoms

100 atoms

1000 atoms

1 atom

The heat of formation of SO₂(g) is -70.9 Kcal. The energy required for the decomposition of 1 mole of SO₂(g) is

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35.50 Kcal

70.9 Kcal

141.8 Kcal

-35.9 Kcal

A solution of sodium sulphate was electrolysed using some insert electrodes. The products at the electrodes are

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O₂, H₂

O₂, Na

O₂, SO₂

O₂, S₂O₈²

Replacement of Cl of Chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-Dinitrochlorobenzene is readily replaced because

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NO₂makes the electron rich ring at ortho and para positions

NO₂withdraws electrons at metaposition

NO₂donate electrons at m-position

NO₂withdraws electrons at ortho and para position

The ratio of the ionization energy of H and Be³⁺is

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1 : 1

1 : 3

1 : 9

1 : 16

Cotton has cellulose in it:

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96%

97%

98%

99%

Action of Zn with alkyl halides in the presence of an inert solvent forms higher alkanes. This reaction is known as

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Wurtz reaction

Frankland's reaction

Cannizaro reaction

Kalobe's reaction

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