Question # 1

∆H=∆E is true for which of the following reaction

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K+H2O----->KOH+H2

N2+3H2------>2NH3

AlCl3+3NaOH--->Al(OH)3+3 NaCl

4Na + O2----->2Na2O

Which process of ester will yield carboxylic acid?

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Hydration

Hydrolysis

Oxidation

Reduction

Gases are good conductor of electricity at

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Low temperature

Low pressure

High pressure

Low temperature and high pressure

Hardness of diamond is attributed to the

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strength of the ionic bonds in the structure

three-dimensional network of covalent bonds

absence of valence electrons in carbon atoms

Which of the following compound shows the geometrical isomerism

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2-butene

2-butyne

2-butanol

Butanol

Which of the following bonds is not present in NH4CL

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lonic bond

Covalent bond

Co-ordinate covalent bond

De-localized covalent bond

The film forming components of paints are

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resins

thinners

pigments

driers

A peptide having molecular mass of more than 10,000 is called as

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Fat

Vitamin

Carbohydrate

Proteins

Liquids are less common than solids and gases because

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They exist in narrow range of temperature and pressure

They have definite volume

Liquid molecules can slide past each other

Molecules contain three type of motion

In which of the following compounds hydrogen bonding is not present

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water

ethanol

ether

ammonia

Primary pollutant is that:

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Waste product of an industry

Which causes cancer

Whose concentration cannot be controlled

Which corrode the metal only

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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The process in which orbitals of different energies and shapes mix with each other to give equivalent hybrid orbitals is called

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Isomerization

polymerization

Hybridization

Resonance

The compound prepared by a substitution reaction of benzene is

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Acetophenone

Glyoxal

Cyclohexame

Hexabromo cyclohexane

Strong reducing agents gave

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Greater positive value of standard reduction potential

Greater negative value of standard reduction potential

Lesser positive value of standard reaction potential

None of these

The experimental evidences for the existence of atomic nucleus comes from:

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Line spectrum of hydrogen.

Magnetic bonding of cathode rays.

Millikan oil drop experiment.

Scattering of alpha particles by thin metal foil.

Aldelydes are the oxidation product of

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P-alcohols

s-alcohols

ter-alcohols

carboxylic acids

Which reaction is example of nucleophilic substitution

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50 cm³of 0.05 molar nrea (N₂H₄CO) solution has % W/N concentration

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6%

3%

0.3 %

0.6 %

Which compound is more soluble in water

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C₂H₅OH

C₆H₅OH

CH₃OCH₃

n-hexanol

A solution having pH = 4 its OH^-ion concentration in mole dm^-3is

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1.0 x 10^-4

1.0 x 10^-10

1.0 x 10^-14

1 x 10⁰

Esters have peculiar smell, which of the following is used as an essence of orange

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Isoamyl acetate

Iosamyl valerate

Octyl acetate

Methyl butyrate

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