Question # 1

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

Which of the following is the second anciently known metal.

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Nickel

Copper

Gold

Silver

Zinc oxide is.

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A basic oxide

An amphoteric oxide

An acidic oxide

A neutral oxide

Which one of the following is not correct.

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Ar is used in electric bulbs

Kr is obtained during radioactive decay

Boiling point of H2 is lowest among all noble gases.

Xe forms Xe OF4

Aluminothermy used for on the spot welding of large iron structures is based upon the fact that.

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As compared to iron, aluminium has greatest affinity for oxygen.

As compared to aluminium, iron has greater affinity for oxygen

Reaction between aluminim and oxygen endothermic

Reaction between iron and oxygen is endothermic

All the member of group III A are metals except.

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B

Ai

Ga

In

LiAIH4 is most useful reducing agent It reduce to alcohol

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Aldehydes

Ketone

Carboxylic acid

Any of above

An element with atomic number 20 is placed in which period of the periodic table.

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1

2

3

4

Finely divided iorn combines with CO to give

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Fe(CO)3

Fe2 (CO)9

F33(CO)12

Fe(CO)6

Hybridization involves.

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Orbitals of same atom with slightly different energies.

Orbitals of different atoms, but with equal energies.

Orbitals of the same atom but with widely different energies.

Orbitals of different atoms with different energies.

The alkali metal that react with nitrogen directly to form nitrides.

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Na

K

Rb

Li

The first ionization energy of Mg is lower than

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Na

Ca

Al

Be

Explosive trioxide XeO3 is produced when

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XeOF4 reacts with water

XeOF4 reacts with silica

XeF4 reacts with water

Any of above statements

Which of the following has maximum number of unpaired electrons.

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Fe3+

Fe2+

Co2+

CO3+

The bond order for BO molecule is.

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2.5

3.0

2.0

3.5

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

CFT can very well explain

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Color

Magnetic properties

Spectra of transition metal

All

Which librates H2 with NaOH

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B

AI

Zn

All

Which one of the following oxides is basic.

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MnO

Mn2O3

MnO2

Mn2O7

In coordination chemistry the donor atom of a ligand is.

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A Lewis acid

The counter ion

The central metal atom

The atom in the legend that shares an electron pair with the metal

Stainless steel contains.

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Fe + Cr+ Ni

Fe + Ni + Cu

Fe + Cr+ Cu

Cu + C + Ni

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