Question # 1

Acid rain effects

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Human being

Crops

Aquatic life

All above

The acetylene molecule contain a

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Single bond

Double bond

Triple bond

Co ordinate bond

O2 molecule is.

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Fermagnetic

Forromagnetic

Paramagnetic

Diamagnetic

Which of the following contains both covalent and ionic bond.

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CCl4

NH4Cl

CaCl2

H2O

Electron affinities of halogens are in the order.

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F > Cl > Br > I

Cl > F > Br > I

Cl > Br > I > F

Cl > Br > F > I

Zero group elements are called as

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Inert gases

Rare gases

Noble gases

All of above

The correct order of ionization energies of alkali metals is.

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Li > Na > K > Rb

Na > K > Rb > Li

Rb > K > Na > Li

Rb > K > Li > Na

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.

The hydrogen bond is strongest in.

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

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

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

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

Electronegativity is given by

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Average of first and second ionization energies.

Average of first and second electron affinites

Average of ionization energy and electron affinity

None of the above

The number of electrons involved in bonding in Lewis structure of oxalate ion is

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20

14

22

18

The state of hybridization of carbon in CO2 is

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sp2

sp

sp3

dsp2

The pair of molecules or ions having identical geometry is.

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BCl3, PCl3

BF3, NH3

CHCl3, CCl4

SiCl4, CCl4

The types of coordinate compounds.

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Labila

Inert

Both A and B

None of above

The state of hybridization of Xe in Xe F6 are

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sp2

sp3

sp3 d

dsp3

When steam is passed over red bot coke The product formed is

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Hydrogen and carbon dioxide

Mixture of hydrogen and carbon monoxide

Mixture of hydrogen and oxygen

Heavy hydrogen

The most stable oxidation state of chromium is.

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+6

+3

+4

+2

[Ti(OH2)6]3+ gives colour

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Green

Red

Purple

Blue

Select the correct IUPAC nae for [Co(NH3)6 ]2+

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Hexammoniacobaltate (II) ion

Hexaamminecobaltate (II) ion

Hexammoniacobalt (II) ion

Hexaamminecobalt (II) ion

Which of the following statements about anhydrous aluminium chloride is correct.

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It exist as AlCl3 molecules

It is not easily hydrolysed

It sublimes at 100 ^oC under vacuum

Boron does not form B³⁺ ions

Which of the following hydroxides is most stable.

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Mg (OH)2

Ca(OH)2

Sr (OH)2

Ba (OH)2

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