Question # 1

A polymer may be

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Linear

Branched

Cross linked

All of these

Which of the following is derived lipid

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Sterols

Vit D

Terpenes

All

Which of the following successive ionization energies belong to a Group ll element?

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320,600,1110,1700,5650,

577,1820,2740,1160,14800,

428,3070,4600,5860,7990

736,1451,7740,10500,13600

Chose a point which is not included in the components of environment

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Stratosphere

Hydrosphere

Lithosphere

Biosphere

The 95.5% mass of Lithoshone is made of 11 elements i,e O₂, Si, Al, Fe, Ca, Na, K, Mg, Ti, H₂and P. Which element is present in trace amount

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iodine

bromine

lead

carbon

The maximum hydrogen bonding is in:

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diethyl ether

ethanol

water

benzene

According to Avogadros law 1 mole of gas at S.T.P has a volume of

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22.4 dm³

24 dm³

24000 cm³

2m³

The reaction C2H5CI + aqueous KOH---------C2H5OH+ KCI is

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Electrophilic addition

Nucleophilic addition

Electrophilic substitution

Nucleophilic substitution

Which sequence of step is correct for the manufacture of cement:

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Crushing, mixing, heating, grinding

Crushing, heating, mixing, grinding

Crushing, grinding, mixing, heating

Mixing, heating, grinding, crushing

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

The boiling point of radon (211k)id higher than boiling point of helium (4.4k). This is due to the reason that:

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the atomic mass Rn is larger than that of He

the dispersion forces between Rn atoms are more prominent than between he atoms

rn atomic number of Rn is larger than that of He

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It decolourises aqueous bromine rapidly

It is insoluble in water

It reduces Fehling's reagent

Two molecules react with each other in the presence of a strong acid

Water is purified by the process:

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Aeration

Coagulation

Chlorination

All of these

Cotton is ______% cellulose

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90

100

99

30

Hydrocarbons are divided into aliphatic, alicyclic and aromatic which structure among the following show an alicyclic hydrocarbon

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Toluene can be oxidized to benzoic acid by

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KMnO₄(alk)

K₂Cr₂O₇(acidic)

Both

None

Palmitic acid & steanic acid ae obtained from process of fats & oils:

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Reduction

Neutralization

oxidation

hydrolysis

Two moles of HI was heated in a sealed tube at 440°C till the equilibrium was reached. HI was found to be 22% decomposed. The equilibrium constant for dissociation is

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0.282

0.0796

0.0199

1.99

Identify the hydrocarbon formed, when ethyl bromide reacts with, alcoholic KOH at 100°

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Methane

Ethane

Ethene

Ethyne

In a group, the ionization energy

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Increase

Decreases

Remain constant

First increases then decreases

Which woody raw material is used of the manufacture of paper pulp

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Cotton

Bagasse

Poplar

Rice straw

The molarity of toluene solution in benzene is 0.22 if 5 grams of toluene dissolved, then mass of benzene is grams is

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267

260

240

247

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