Question

SECTION-A
1. Covalent compounds have low melting and boiling point. Why?
2. Define the term induced electric current.
3. State modern periodic law.
4. Name the end product of breakdown of glucose in aerobic respiration.
OR
Name two artificial ecosystem
5. What is the common name of the compound Caoci, ?
SECTION-B
6. What are the two properties of carbon which lead to the huge number of carbon compounds we
see around us?
7. What is the role of saliva in the digestion of food?
8. Why is sodium kept immersed in kerosene oil?
OR
Show the formation of Na2O and Mgo by the transfer of electron.
9. The refractive index of diamond is 2.42. What is the meaning of this statement?
OR
Define 1 dioptre of power of a lens?
10. Why are copper and aluminium wires usually employed for electricity transmission?
OR
List the properties of magnetic lines of force.
SECTION-C
11. Complete and balance the following chemical equations:-
i) NaOH(aq) + Zn(s)
CaCO3(s) H2O(l) + CO2(g) →
HCl(aq) H2O(1)
12. (a) State the role played by the following in the process of digestion
(0) Enzyme trypsin​

Answer 1

Answer:

Covalent compounds have low melting and boiling point. Why?

2. Define the term induced electric current.

3. State modern periodic law.

4. Name the end product of breakdown of glucose in aerobic respiration.

OR

Name two artificial ecosystem

5. What is the common name of the compound Caoci, ?

SECTION-B

6. What are the two properties of carbon which lead to the huge number of carbon compounds we

see around us?

7. What is the role of saliva in the digestion of food?

8. Why is sodium kept immersed in kerosene oil?

OR

Show the formation of Na2O and Mgo by the transfer of electron.

9. The refractive index of diamond is 2.42. What is the meaning of this statement?

OR

Define 1 dioptre of power of a lens?

10. Why are copper and aluminium wires usually employed for electricity transmission?

OR

List the properties of magnetic lines of force.

SECTION-C

11. Complete and balance the following chemical equations:-

i) NaOH(aq) + Zn(s)

CaCO3(s) H2O(l) + CO2(g) →

HCl(aq) H2O(1)

12. (a) State the role played by the following in the process of digestion

(0) Enzyme trypsin

Answer 2

Answer:

शीला की मित्र एक गीत मधुर ध्वनि मैं सुनती है translation in English