Question # 1

The enthalpy of reaction C+O2 ------ CO2

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-571.6 kJ

-393.5 kJ

+53.8 kJ

-110.5 kJ

Whcih acid is present in our stomach.

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Nitirc Acid

Hydrochloric acid

Sulphuric acid

All of the above

Alkalis react with ammonium salts to librate.

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CO2

SO2

H2

NH3

Whcih subshells are present in L - shell?

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S and P

Only s -sub shell

Only p - sub shell

Sub shell

Which halogen memebr exists in a liquid stte at room temperature

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Bromine

Chlorine

Fluroine

Iodine

Actinide series starts after the element

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Actinium

Lanthanum

Osmum

Silver

How many electrons can be accommodated at the most in the third shell of the elements.

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8

10

18

32

Electronegativity of oxygen is.

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3,1

3,3

3.4

3,2

Hydrogen and Helium follow.

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Octet rule

Triple rule

Duplet rule

None of these

Malleability is the property by virtue of which a metal can be drawn into.

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Rods

Plates

Sheets

Wires

Hazardous effects of shopping bags are studied in

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Geochemistry

Inorganic chemistry

Environmental chemistry

analytical chemistry

Main group elements are arranged in ..............groups.

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7

6

8

10

How many elecntrons are present in the valence shell of group 1 elements.

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1

2

3

4

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