Question

Std.- VIII
First Semester Exam.2020-21
Sub.-Science
Date-04/11/2020
Marks-50
IRIES
Q.1.A) Fill in the blanks.
1) The electronic configuration of magnesium is 2,8,2 from this it is
understood that the valence shell of magnesium is
2) Milk is an example of type of matter called
3) The SI unit of pressure is .....
4) An electric current flowing in a wire creates around the wire.
5) The intermolecular force is ........... in the particles of solid.
6)
is used in the treatment of goiter , disease of thyroid gland.
7) Compounds that decompose on strong heating to leave a Residue beh
are called ...
8) Electronic configuration of nitrogen is........
B) State whether the following statements are true or false.
1) Radioactive isotope topic C-14 is used for nuclear fission and product
of electricity.
2) Cell wall of fungi is made up of chitin.​

Answer 1

Answer:

1st= M

2nd=colloid

3rd= pascal (P)

4th= create magnetic field

5th= two molecule or atom

6th= radioactive iodine

7th=

8th=[ HE] 2s2 2p3

1st false

2nd true