Question # 1

Group III A of the periodic table consist of elemetns.

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3

4

5

6

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

Radon is obtained only in the radioactive decay of

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Radium

Thorium

Actinium

Any of above

After assimilation urea leaves behind in the soil

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NH3

CO2

Both A and B

None of above

Which of the following statements is false about transition metals.

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They form complexes

They show variable valency

All transition metal compounds are paramagnetic

They form coloured ions

According to Fajns rules, which one of following results in increased ionic nature of the covalent bond.

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Larger cation and smaller charges on anion

Larger cation and larger charge on anion

Smaller cation and smaller charge on anion

Smaller cation and larger charge on anion

Which of the following elements has the highest density.

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Mg

Na

K

Rb

Which ionization Potential in the following equations involves the greatest amount of energy.

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Na = Na+ + e

K = K+ +e

C2+ = C3+ +e

Ca+ = Ca2+ + e

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

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Tempering

Annealing

Quenching

Hardening

Molecule of oxygen is

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Diamagnetic

Paramagnetic

Both A and B

None of above

O2 molecule is.

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Fermagnetic

Forromagnetic

Paramagnetic

Diamagnetic

Ca2+ is isolelectronic with.

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Mg2+

Kr

Ar

Na+

The element with maximum first ionization energy is.

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B

N

O

C

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 ahs non zero dipole moment.

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NH3

SF6

BF3

CO2

In German Silver copper is alloyed with which metal.

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Zn

Ni

Ai

Zn and Ni

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

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Ne

Na+

F

O2-

[Ti(OH2)6]3+ gives colour

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Green

Red

Purple

Blue

SO2 acts as

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Lewis base

Lewis acid

Botha A and B

None of above

Arrhenius concept explained

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Constant heat of neutralization

Quantitative determination of acid base strength

Catalytic property of acid

All above

The hydrogen bond is strongest in.

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O - H .............S

S - H.............O

F- H....................F

F - H...............O

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