Question # 1

Which of the following is soluble in water?

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СН3ОН

CCL4

CHCI3

CS2

An element from the given below exists as discrete small molecules in the solid state. Which is that?

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Sodium

Silicon

lodine

lron

The gases law describe the ______ Behaviour of gases

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Variable

Constant

Uniform

Best

Separation of low molecular weight protein from high one is

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Dialysis

Cromotography

Electrophoiesis

Ultracentrifugation

A transition element X has a configuration [Ar) 4s3dd in its +3 oxidation state. Its atomic number is

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25

26

22

19

Active sulphonating agent during sulphonation of benzene is

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SO2

SO3

SO3H

SO3+

The other name for cross linked polymers is

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Linear polymer

Branched polymers

Inter connected polymers

None of these

Primany aleohols sornally give us aldehyde when oxidized in the presence of acidified Na2Cr2O7, what will be the product, when the secondary alcohols are oxidized in same condition?

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Alkenes

Alkyl halide

Alkynes

Ketones

Li resembles with Mg, because

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the ratio of their charge to size is nearly the same

both have nearly same size

both are metallic in nature

both are found together in nature

Succinic thiokinase is an enzyme of the type

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mutase

peroxidase

ligase

lyase

Soil remediation means

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to make it suitable for cultivation of crops

to make it acidic

to make it alkeline

to add manure into it

The relative atomic mass of chlorine is 35.5. What is the mass of 2 mol of chlorine gas

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142 g

71 g

35.5 g

18.75 g

A compound R has all of the following properties. It is neutral; It gives an orange precipitate with 2,4-dinitrophenythydrazine; it evolves hydrogen chloride when treated with PCI₅in the cold What could R be

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Iodoform test is given by:

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Formaldehyde and Higher ketones

Formaldehyde

Acetaldehyde and methyl ketones

Acetaldehyde

A compound having empirical formula C₃H₃O and its molecular mass is 110.02. Its molecular formula is

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C₃H₃O

C₆H₆O₂

C₉H₉O₃

C₃H₆O₂

Terylen fibre is made by reaction of terephthalic acid with

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Ethylene

Ethylene glycol

Glycol

Terylene

The hydrocarbon which is used as an illuminating agent

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Methane

Methene

Methyne

B & C

The formation of PVC from vinyl chloride is an example of

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Substitution reaction

Addition polymerization

Condensation polymerization

Condensation reaction

The detection of functional group is called:

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Numerical analysis

Qualitative analysis

Quantitative analysis

Combustion analysis

All the elements belongs to the 2nd period are

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Normal elements

Transition elements

Stable elements

Halogens

Equal volumes of ethylene glycol (molar mass = 62) and water (molar mass = 18) are mixed. The depression in freezing point of water is (given K_rof water = 1.86 K mol^-1kg and specific gravity of ethylene glycol is 1.11)

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0.003

3.33

0.333

33.3

On heating glycerol with conc. Sulphuric acid a compound with unpleasant odour is obtained. The compound is

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Methyl alcohol

Formic acid

Prop-2-enal

Glycerol sulphate

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