Question # 1

Oxidation state of Mn' in KMnO4. K2MnO4, MnO2 and MnSO4 is in the order

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+7.+6.+2,+4

+6,+7,+2,+4

+7. +6.+4.+2

+4, +6, +7,+2

Carbon Monoxide is:

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colouriess

orderless

high toxic

All of these

The surface formed by the breakage of a crystal is called _____ plane

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Crystal

Unit

Cleavage

None

A fat with 18 carbon & no double bond will be

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Solid

Liquids

Gel like

None

What is effect of polluted air on enviroment:

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Ozone

Global warming

Acid rain

Smog

In which of these processes are small organic molecules made into macro-molecules?

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The cracking of petroleum fractions

The fractional distillation of crude oil

The polymerization of ethane

The hydrolysis of proteins

Cl₂is a gas while iodine is a solid due to

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stronger London forces with high polarizability

greater electro negativity of Cl than iodine

stronger dipole dipole forces

iodine is colored while chlorine is colourless

Helical structure of proteins is stabilized by

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Peptide bond

Dipeptide bond

Van der Wall's forces

Hydrogen bonding

The temp. and pressure used for PVC polymerization is

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10°C and 10 atm

20°C and 20 atm

52°C and 9 atm

100°C and 10 atm

The height of the peak in the mass spectrum shows

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Number of isotopes

Relative abundance

Mass number

Number of protons

Formic acid is obtained from red out by:

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Distillation

Crystallization

Filtration

Sublimation

Energy of electron in the infinite Bohr orbit of H-atom is

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0 KJ/mole

1 KJ/mole

-1 KJ/mole

-1313.32 KJ/mole

Which compound has the maximum repulsion with water?

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C₆H₆

C₂H₅OH

CH₃CH₂CH₂OH

CH₃----O---CH₃

The rate equation for a reaction is Rate =k[A]. what are unit of K ?

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Mole-1 dm³ S^-1

Mole dm³ S^-1

Moledm³

S^-1

When cathode rays strike the anode metal X-rays are emitted and not the positive rays because

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Cathode rays are material particles

Cathode rays knock out electrons from anode, which emit X-rays when outer electron take their place

Cathode rays are absorbed by the nucleus

Cathode rays become heated

The elimination of hydrogen halide from adjacent carbon atoms is called

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Dehydrogenation

Hydrogenation

Dehydrohalogenation

Hydrohalogenation

The empirical formula of a liquid compound is known to be C₂H₄O. What other information is needed to work out its molecular formula?

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The percentage composition of the compound

The relative molecular mass of the compound

The density of the compound

The volume occupied by one mole of the compound

Hydrolysis of Grignard's reagent yields

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Alcohol

Aldyhyde

Ester

Alkane

Most common oxidation states shownby cerium are

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+2, +4

+3, +4

+3, +5

+2, +3

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A strong reducing agent

A strong oxidising agent

Better oxidising agent than hydrogen

Less reducing agent than hydrogen

If an electrophile attacks then ______ bond breaks first

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C - H

O - H

C - O

None of these

The sun of all the energies of atoms, molecule, ion, within system is called

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Enthalpy

K.E. of the system

Internal energy

None

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