Question

1) The main constituents of cooking gas are_
a) Propane and buetane b) butane and benzene
c) propane and benzene d) methane and acetylene
2) Which of the following CAN be used for giving glitter to a corroded copper article?
a) Lemon juice
b) Tamarind juice
Silver nitrate solution d) All of these
3) Which of the following elements reacts vigorously with water?
a) Mg
b) K
c) AI
d Ca
To obtain an image of the same size as that of an object using a convex lens, the
object should be placed
a) at 2F
b) Between F and 2F
c) at 2Fi
d) at infinity
5) Value of gravitional constant G on the moon will be
a) 1/6 value of G on the earth b) 6 items value of G on the earth.
c) Same as that of value G on the earth.
d) twice value of G on the earth.​

Answer 1

Answer:

1) The main constituents of cooking gas are_

a) Propane and butane

2) Which of the following CAN be used for giving glitter to a corroded copper article?

a) Lemon juice

3) Which of the following elements reacts vigorously with water?

d Ca

4. To obtain an image of the same size as that of an object using a convex lens, the

object should be placed

c) at 2Fi

5) Value of gravitional constant G on the moon will be

a) 1/6 value of G on the earth.

I guess it is Class X NCERT.