Question

b) --
1
Choose the correct answer -
1) Sl unit of resistance is -
a) volt
b) Ohm
c) Ampere
d) watt
2)
The mirror formula of spherical mirror is -
1
1 1
+
c) f = R/2 d) none
3) How many elements are discovered till now
a) 115
b) 215
c) 114
d) 118
4) Which of the following is most reactive metal
a) lead
b) mercury
c) sodium
d) iron
5) Example of symbiosis is -
a) sandal
b) nepenthes c) fungi
d) lichen
Fill in the blanks -
1) Amoeba is a
organism
2) The least distance of distinct vision of healthy human eve is
3) The focal length of spherical mirror is
of its radius
The metal
is in liquid state at room temp.
5) The properties of elements are periodic function of their
Match the columns -
1) SO, and SO, a) ultraviolet radiation
2) Ampere
b) acetic acid
3) Vinegar
unit of electric current
Voltaic cell
d) acid rain
5) Ozone layer
electrical resistance​

Answer 1

Answer:

1 - H

Explanation:

2-G 3

3-d

4-c

6+ nikal