Question

Multiple Choice Questions.
9. Element X forms a chloride with the formula XC12 which is a solid with a high melting point.X would most likely be in the same group of the Periodic Table as
(a) Na
(b) Mg
(c) AI
(d) si
10. The brain is responsible for
(a) thinking (b) regulating the heartbeat. (c) balancing the body (d) all of above
11. Where should an object be placed in front of convex lens to get a real image of the size of
the object?
(a) At the principal focus of the lens. (b) At twice the focal length
(c) At infinity (d) Between the optical centre of the lens and its principal focus.
12. A solution reacts with crushed egg-shells to give a gas that turns lime-water milkey.
The solution contains
(a) Naci
(b) HCI
(c) LiCI
(d) KCI​

Answer 1

Answer:

9. (a)

10.(d)

11.(b)

12.(b)

Answer 2

Explanation:

Multiple Choice Questions.

9. Element X forms a chloride with the formula XC12 which is a solid with a high melting point.X would most likely be in the same group of the Periodic Table as

(a) Na

(b) Mg

(c) AI

(d) Si

10. The brain is responsible for

(a) thinking

(b) regulating the heartbeat

(c) balancing the body

(d) all of above

11. Where should an object be placed in front of convex lens to get a real image of the size of

the object?

(a) At the principal focus of the lens

(b) At twice the focal length

(c) At infinity

(d) Between the optical centre of the lens and its principal focus

12. A solution reacts with crushed egg-shells to give a gas that turns lime-water milkey.

The solution contains

(a) Naci

(b) HCI

(c) LiCI

(d) KCI