Question # 1

The green colour of glass is due to the presence of.

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Chromium (III)

Cobalt (II)

Mn (IV)

Iron(III)

The Lewis formula of SOCl2, the total number of bond pairs and lone pairs of electron around sulphur are.

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2 ,1

2,2

3,1

3,0

Borax exist in the form

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Ordinary borax

Octahdral borax

Borax glass

All above

Catenation is a process of.

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Formaton of cations

Deposition of cations

Formation of long chain of identical atoms

Formation of covalent bond

The lightest alkali metal is.

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Lithium

Sodium

Rubidium

Caesium

Which of the following compounds has highest boiling point.

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HI

HF

HBr

HCl

The first ionization energies of the elements of the first transition series. (Ti _____ Cu)

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Increases as the atomic number increases

decreases as the atomic number increases

Do not show any change as the addition of electrons takes place in the inner (n-1) d -orbitals.

Increases from Ti to Mn and then decreases from Mn to Cu

The ions Sc3+ , Ca2+ and K+ have same electronic configuration as that of.

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Neon

Argon

Krypton

Xenon

Which of the following compounds liberates CO2 on heating.

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Li2CO3

Na2CO3

K2CO3

All liberate CO2 on heating.

The carbonate of which of the following will have highest lattice energy.

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Barium

Magnesium

Calcium

Strontium

HCIO evolves Cl2 and O2 when dissolve

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Ca

Ni

Cu

Any of above

Considering the element B,C, N, G and Si, the correct order of their non- metallic character is.

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B > C > Si > N > F

Si > C > B > N > F

F > N > C > B > Si

F > N c > > SI > B

When metal orbital are rotated in octahedral field the following representation obtained.

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t2 g + lg

a1 g

t 1 u

All above

Which of the following hydroxides has the maximum solubility in water.

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Mg (OH)2

Ca (OH)2

Sr (OH)2

Ba (OH)2

The Hall process involves the reduction of Al2O3 to aluminium by

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Carbon

Carbon monoxide

Molecular hydrogen

Electrolysis

The value of Kw increase with temperature because the ionization of water.

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Positive

Negative

Endothermic

Exothermic

Iron which contains up to 1% carbon is called.

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Steel

Cast iron

Wrought iron

Pig iron

All halogens exist as covalent molecules.

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Monoatomic

Daitomic

Triatonic

Tetra atomic

Which of the following compounds combines with hemoglobin.

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CO2

CO

NO

N2

Which of the following process is not involved in the purification of bauxite.

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Bayer's process

Serpek's process

Hall's process

Goldsmith's process

Molecule is a diatomic

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Nitrogen

Phosphorous

Arsenic

Antimony

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