Question # 1

The solubility of A2B3 is X mole dm-3. Its Ksp is?

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6X(5)

36X(5)

64X(5)

108X(5)

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 reactions to take place

air must be blowing swifty

there must be SO₂in the air

Most of the universe consists of the matter in :

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Gaseous state

Liquid state

Plazma state

Solid state

Proteins have linkage between amino acids

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imide

amide

ester

ether

SiO₂ is an example of:

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metallic crystals

lonic crystals

a crystal whose structure depending upon the temperature

covalent crystals

Cellulose does:

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Satisfy human appetite

Stimulates intestinal peristalsis

Fives fibre and bulk to the food

All of these

When light is exposed to a typical transition element, then electrons jumps from low orbitals to higher orbitals in

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f-orbitals

s-orbitals

p-orbitals

d-orbitals

Glycogen is stored in

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Animals

Plants

Soil

None of these

One atmosphere is equal ___________ Pascal

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760

101325

14.7

1.01325

Which one of the following is a water soluble vitamin?

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niacin

rioflavin

trypsin

ascorobic acid

Why a C- C bond breaks by uv light

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Cl is most electronegative

Cl is volatile

C - Cl bond energy is smaller than that of C - H bond energy

uv light provides energy which is sufficient to break C - Cl bond and not C - H bond

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-1.10 V

+1.10 V

-0.42 V

+0.42 V

Rutherford's atomic model suggests the existence of

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Atom

Nucleus

alpha particle

Measons

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Pent -1-ene-3-yne

2-pentyne-4-ene

1-pentene-3-yne

Pent-2-yen-4-ene

β-D-glucose is a monomer for

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Strach

Cellulose

Glycogen

Protein

The value of activation energy Ea of a reaction can be determined from the value of slope of the straight line obtained by plotting a graph between 1/T and log k. the value of Ea is equal to

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Slope

1/Slope

Slope x R

Slope x 2.303 R

All 3d series elements show variable oxidation states. The one shown by all 3d elements is

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+2

+3

+4

+5

In Tolten's best, the end product is ______ formed

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White ppts

Red ppts

Yellow ppts

Silver mirror

Phosphate pollution is caused by

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Weathering of phosphate rocks only

Agricultural fertilizers

Phosphate rocks and sewage

Sewage and agricultural fertilizers

Which one of the following correctly describes the acid properties of phenol

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Stronger than HCI

Stronger than carboxylic acid

An acid stronger than carbonic acid

An acid weaker than carboxylic acid

The liquid obtained after passing the mixture through filter paper is termed as:

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Extract

Residue

Filtrate

Sample

Diethyl ether is obtained by Williamsons synthesis using

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Ethanol + Na + C₂H₅Br

Ethanol + Mg + C₂H₅Br

Methanol + Na + CH₃Br

Methanol + Mg + CH₃Br

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