Question # 1

Which of the following gas is lightest.

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Dihydrogen

Helium

Dinitrogen

Dioxygen

Arrhenius concept explained

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Constant heat of neutralization

Quantitative determination of acid base strength

Catalytic property of acid

All above

In nature nickel is found in the form of.

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Sulphides

Silicates

Arsenides

All

The correct order of second ionization potential of carbon nitrogen, oxygen and fluorine is.

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C > N > O > F

O > F > N > C

O > N > F > C

F > O > N > C

The geometry of Xe F2 is

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Triangular planar

Square planar

Linear

Trigonal bipyramidal

Potassium crystallizes in a body centered lattice. Hence, the coordination number of potassium in potassium metal is.

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4

6

8

12

Which of the following oxides is amphoteric..

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CaO

BaO

BeO

MgO

Which of the following statements correct regarding copper.

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It is used in electroplating

Its salts are used as insecticides

Its salts are used as coloring materials

All are correct

The electromagevitiy of the following elements increase in the order

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F > Cl > O > S

S > Cl > O > F

F > O > N > C

C > O > N > F

Which one has a co ordinate bond.

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Al2Cl6

BF3

NaCl

O2

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

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2,1

2 ,2

3 ,1

3 ,0

The basic strength of hydrides of group 15 elements very in the following order.

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NH3 > PH3 > AsH3 > SbH3 >BiH3

PH3 > NH3 > AsH3> SbH3 > BiH3

BiH3> NH3 >PH3 > AsH3 > SbH3

NH3 > PH3 > SbH3 > AsH3 > BiH3

Which of the following statements false about transition metals.

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They form complexes

They show variable valency

All transiting metal compounds are paramagnetic

They form coloured ions

The atomic and ionic radii value on moving from left to right in the sereis.

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Increase

Decrease

Does not change

None of above

If the absorbed light is green the transmitted light will be

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Purple

Orange

Violet

Black

Which of the following interaction is the strong.

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Dipole -dipole

Ion induced dipole

Ion -dipole

Dipole induced diple

The maximum absorption in [Ti(OH)2)6 3+ take place at wavelength of.

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6000 A^o

10000 A^o

4000 A^o

5000 A^o

Excluding H-atom , Hydrogen bond never involves more than atoms.

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One

Two

Three

Four

Which of the following metals is the most abundant in the earth's crust.

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Mg

Ca

K

Na

Which one of the following elements shows the most stable oxidation state of +1

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AI

Ga

In

TI

Which of the following orbitals has maximum penetration effect.

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s

p

d

f

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