Question # 1

NH₃shows maximum boiling among the hydrides of group V elements. The is due to:

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pyramidal structure of NH₃

H-bonding between its molecules

enhanced electronegative character

very small size of nitrogen

A graph is plotted, P on x-axis and V on y-axis for a given mass at constant temperature, we shall get:

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a curve with different peaks

a curve called isotherm

straight line parallel to x-axis

a straight line

Two substances that have the same crystal structure are said to be

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isomorphous

anisotropic

isotropic

polymorphous

What is the weight of 10 dm³of CO₂at 27°C and 2 atm?

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89.3 g

56.1 g

125 g

127 g

Photochemical smog contains----as main reactants

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Nitrous oxide & unburnt hydrocarbons

NO & brunt hydrocarbons

Nitric oxide & unburnt hydrocarbons

N2O & burnt hydrocarbons

Starch is a polymer of

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Sucrose

Fructose

α-D-Glucose

Lactose

Which of the following alkyl halides undergoes SN1 reaction fastest

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Methyl chloride

Isobutyl chlorido

Ethy l chloride

Tertiary butyl chloride

Collagen is a fibrous protein present most abundantly in

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heart

nucleus

connective tissues

Arteries

Which of the following is sulphur highly containing protein

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Collagen

Keratin

Ossein

Reticulin

Which of the following is incorrect for glucose & sucrose

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Both are water solube

Natural polymers

Source of energy

Carbohydrate in nature

A fat or oil is characterized for extent of unsaturation by one of the following number. Which one is:

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acid number

saoilucfucation umber

rancidity number

iodine number

Which of the following is an ortho-para directing group

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Which reagent is used to reduce a carboxylic group to an alcohol?

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H2/Ni

H2/Pt

NaBH4

LiAIH4

Among O, C, F, Cl, Br, the correct order of increasing radii is

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F O C Cl Br

F C O Cl Br

F Cl Br O C

C O F Cl Br

Solution may have units

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Molarity

Molality

Mole fraction

All of them

The chemical formula of Trona is

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KCl . MgCl₂. 6H₂O

Na₂CO₃. 2NaHCO₃. 2H₂O

Na₂CO₃. H₂O

KCl

Which of the following metal requires radiation of highest frequency to cause emission of electrons?

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Na

Mg

K

Ca

The percentage of H is the highest in

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CH₄

NH₃

H₂SO₄

C₆H₁₂O₆

Glacial acetic acid freezes to ice like solid it.

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07

17

27

37

Alcohols reacts with Grignard reagent to form

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Alkanes

Alkenes

Alkynes

All

I-Chloropropane has two isomers, it is an example of

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Chain isomerism

Position isomerism

Functional group isomerism

Metamerism

The rate of forward reaction is two times that of the reverse reaction at a given temperature and identical concentration, K equilibrium is

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0.5

1.5

2.5

2.0

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