Question # 1

Acid rain has pH less than.

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6

7

7.4

5.6

When acids react with metal with carbonates and bicarbonates which gas is produced.

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N2

H2

Cl2

CO2

Whcih types of bond is present between NH3 and BF3

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Covalend Bond

Ionic Bond

Co ordinate covalent bond

Metallic Bond

Period nuebr tells abou the

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No. of valance electrons

No. of electronic shells

Both a and b

None of the above

In diamond, each C-atom is covaently bonded wiht.......C-atom

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Two

Three

Four

Five

The vertical columns present in the priodic table are called.

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Group

Period

Both a and b

None of these

Which area of chemistry imoroves to gauge the behavior of pollutants and develp techniques for polution control?

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analytical chemistry

geochemistry

Organic chemistry

Environmental Chemsitry

Platinum alloyed with which metal is used as catalyst in automobiles as atalytic covertor.

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Gold

Rhodium

Palladium

Both a and b

Covalent bond is most commonly found between the elements of group

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1 to 13

16 to 18

13 to 17

15 to 18

Which liquid among the followingis a colloidal solution.

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Milk

Slaked lime used for white wash

Vinegar solution

Mixtur eof AgCl in water

In an irreversibel reaction equiirbrium is.

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The forward reaction will be fovoured

No effect on forward or backward reaction

No effect on bakcwars reaction

The backward reaction will be favoured

Which among of the followign has a double covalent bond.

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Ethane

Methane

Acetylene

Ethylene

The ability of an atom to attract the shared pair of electons towards itself in a molecule is called

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Ionization energy

Electronietativity

Shielding effect

Electron affinity

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