Chp 7 Elements Of Group 16 17 And 18

Question 1

Write the order of the thermal stability of hydrides of group 16 element.

Answer 1

H2O>H2S >H2Se >H2Te

Question 2

What is the oxidation state of te in Teo3

Answer 2

+4

Question 3

Name two gases which deplete ozone layer

Answer 3

Nitrogen oxide (NO) release from exhausted systems of car or supersonic jet aeroplane and chlorofluorocarbons (freons) used in aerospace and refrigerator deplete ozone layer.

Question 4

Give two uses of CLO2

Answer 4

CLO2 is used as a bleaching agent for paper pulp and textile also use in water treatment

Question 5

What is the action of bromine on magnesium metal

Answer 5

Bromine reacts instantly with magnesium metal to get magnesium bromide.
Mg(s) + Br2 — MgBr2