SECTION-A

1 Write a balanced chemical equation when lead nitrate on heating forms lead oxide, nitrogen dioxide and oxygen.

2 Name two non- conventional resources of energy which were used conventionally earlier. 

3 On what factors does occurrence of single displacement reactions depends? 

4 A metal ore X is used in roasting. What kind of ore could X be? Name other type of ore which is reduced by calcination.

SECTION-A

Q1.Name the functional groups present in CH₃COOH& CH₃COCH₃?

Q2. List any two industries based on forest?

Q3. What is the nature of the image formed by a concave mirror if the magnification produced by the mirror is +3?

Q4.Properties of some elements aregiven below. Identify in each case the elements and group in the periodic table to which it belongs

(a) A soft metal stored under kerosene.

Section A

1 Name the process of converting vegetable oil to vegetable ghee.

2 List two secondary sexual characters of males that are different from that of females.

3 Write the main function of Ozone in the upper atmosphere

VSA: 

1. State one reason for placing Mg and Ca in the same group of the periodic table. 

2. State two roles of testes in male reproductive system 

3. Why is re-use of materials better than recycling in saving the environment? 

SA: 

1. What is a homologous series? Write the name and draw the structure of the second member of the alkene series. 

2. Give one example of each-

a) Metal having valency .

b) Non metal having valency .

VSA:

1. State one reason for placing Mg and Ca in the same group of the periodic table.

2. State two roles of testes in male reproductive system.

3. Why is re-use of materials better than recycling in saving the environment?

SA: 

1. What is a homologous series? Write the name and draw the structure of the second member of the alkene series.

2. Give one example of each-

a) Metal having valency 2.

b) Non metal having valency 2.