Question # 1

Is a peroxy acid

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H2SO5

H2S2O6

H2SO4

H2S2O7

The bond between two identical non metal atoms has a pair of electrons.

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Unequally shared between the two

Transferred fully from one atom to another

With identical spins

Equally shared between them

Which of the following statements about anhydrous aluminium chloride is correct.

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It exist as AlCl3 molecules

It is not easily hydrolysed

It sublimes at 100 ^oC under vacuum

Boron does not form B³⁺ ions

Among oxides of nitrogen all are gases except.

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N2O5

N2O

NO

N2O3

Colour in transition metal compounds in attributed to

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Small sized metal ions

Absorption of light in UV region

Complete ns sub shell

incomplete (n-1) sub shell

Which of the following does not form stable diatomic molecule.

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Nitrogen

Phosphorus

Hydrogen

Oxygen

Are used as water repellents

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Carbides

Silicon

Silicones

Silicates

In the metallurgy of iron, when limestone is added to the blast furnace, the calcium ion ends up in.

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Slag

Gangue

Metallic calcium

Calcium carbonate

The process of heating to redness and then slow cooling in known as

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Tempering

Annealing

Quenching

Hardening

Type of hybrid orbitals used by the chlroine atom in CIO2 is.

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sp2

sp3

sp

None of these

The boiling point of water is unexpectedly high because.

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H2O molecule in linear

Sp3 hydrogen bonding is involved in the formation of water

There is hydrogen bonding and consequent association of H2O molecules.

Oxygen is the first member of the VI group

Which of the following is the strongest oxidant.

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F2

Cl2

br2

I2

Pick out the incorrect statement regarding ozone.

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O3 is an unstbale dark blue diamagnetic gas

The central oxygen in O3 is sp3 hybridized

It cause the tailing of mercury

It does not react with KOH

d2 sp3 is oriented in a manner

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Trigonal

Tetrahedral

Octahedral

Trigonal bipyramidal

Transition elements, in general exhibit the following properties, except one Name that property.

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Variable oxidation state

Natural radioactivity

Tendency to form complexes

Formation of alloys

In nature nickel is found in the form of.

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Sulphides

Silicates

Arsenides

All

Used in filling luminous tubes.

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Xenon

Krypton

Radon

Helium

Metals are

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Transparent

Tranalucant

Opaque

None of above

Which of the following iso electronic spices has the highest IE.

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Ne

Na+

F

O2-

Acid rain effects

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Human being

Crops

Aquatic life

All above

The Lewis structure of which of the following does not have coordinate bond.

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SO2

HNO3

H2SO4

HNO2

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