Question

In case of reflection of light, the angle of incidence (i) and the angle of reflection (r) are related as *
1 point
i = r
i > r
no definite relation
i < r
2. When a ray of light falls on a mirror perpendicularly, the angle of reflection is *
1 point
180 degree
0 degree
30 degree
90 degree
3. The first menstrual flow begins at puberty and is termed __________ *
1 point
Menarche
Menopause
Fertilisation
Adolescence
4. The most reactive metal is: *
1 point
iron
gold
zinc
potassium
5. The non-metal which is liquid at room temperature is: *
1 point
carbon
iodine
bromine
chlorine

Answer 1

Answer:

1) i=r

2) 0degree

3) Menarche

4) Potassium

5) bromine

Explanation:

hope this is helpful to u

Answer 2

Answer:

1 I=r it is the right answer