Question # 1

Form electron deficient compounds

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B

AI

Both B and AI

None of above

When two atoms of hydrogen combine to form a molecule of hydrogen gas the energy of the molecule.

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higher than that of the separate atoms

Equal to that of the separate atoms

Lower than that of the separate atoms

Sometimes lower and sometime higher.

A mixture of weak acid and its salt is.

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Alkaline buffer

Acidic buffer

Neutral buffer

All of above

Ground state electronic configuration of valence shell in N2 m lecule is written as (a2s)2, (o*2s)2 , (pi sp)4, (o2p)2, Hence, the bond order of N2 molecule is.

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1

2

3

0

Which of the following statements is incorrect.

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The elements of group 18 are known as aerogens.

Group 2 elements are all metals

Metallic character increase on going down a group

All the elements belonging to a particular period have same valence shell configuration.

Which of tetra chloride is resistant to hydrolysis.

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CCl4

SiCl4

GeCl4

SnCl4

Un-like s -block elements d-block elements form which compounds as well

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ionic compounds

Co valent compound

Co ordinate compounds

None of above

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

The size of iso electronic species - F- , Ne, and Na+ is affected by

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Nuclear charge (Z)

Valence principal quantum number (n)

Electron electron interaction in the outer orbital

None of the factors because their size to the same.

Which of the following is planar?

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CH2Cl2

CHCl3

CCl4

C2H2

The noble gases are used due to having property

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Chomical inertness

Low boiling point

Any of a or b

Both a and b

The purification of Bauxite can be carried out.

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Baeyer's process

Hall's process

Serpek's process

Any of above

Both the elements shows allotropy

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B & Ai

B & Si

Al & Si

Any of above

Iodine is a grey black solid and its vapours are in color

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Grey

Black

Yellow

Violet

Ammonia is utilized for

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Manufacture of urea

Oxidation to nitric acid

Manufacture of ammonium sulphate

All above

The element Uuu has atomic numebr

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102

111

101

110

In urea the amount of nitrogen is

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82.0%

46.0%

33.0%

21.0%

The correct order of reactivity among I , Ii, and III IS.

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i > ii >iii

i > iii > ii

II > III > I

III > II > I

Elements in which differentiating electron enters the (n-1) the d-orbitals of the (n-1) the main shell are called elements.

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s- block

p-block

d-block

f-block

The bromine produced on commercial scale may contain impurities of.

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Water

Chloride

iodine

All above

Pi bond is formed

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By the overlapping of atomic orbitals on internuclear axis

By transference of electrons

By sidewise overlapping to half filled p orbitals

By overlapping of s-orbitals with p orbitals

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