Question 7

Which of the following solutions will not make the bulb in Fig glow?

(a) Sodium chlorides
(b) Copper sulphate
(c) Silver nitrate
(d) Sugar solution in diluted water

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Solution

The answer is (d).
Sugar solution in diluted water does not make ions and is a poor conductor of electricity. Therefore, it will not make the current to flow through it and the bulb will not glow.

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Similar questions

In order to obtain a coating of silver metal on a flower vase made of copper, the electrolyte has to be :
(a) silver nitrate solution
(b) copper nitrate solution
(c) sodium nitrate solution
(d) copper sulphate solution

Q. Which of the following solutions will not make the bulb glow (in Fig 14.2)?

Q. The questions (i) to (v) refer to the following salt solutions listed (a) to (f):
(a) Copper nitrate
(b) Iron (II) sulphate
(c) Iron (III) chloride
(d) Lead nitrate
(e) Magnesium sulphate
(f) Zinc chloride

(i) Which two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by barium chloride solution?
(ii) Which two solution will give a white precipitate when treated with dilute nitric acid followed by silver nitrate solution?
(iii) Which solution will give a white precipitate when either dilute hydrochloric acid or dilute sulphuric acid is added to it?
(iv) Which solution becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it?
(v) Which solution gives a white precipitate with excess ammonium hydroxide solution?

What do you observe when

(a) dilute sulphuric acid is added to granulated zinc ?

(b) a few pieces of iron are dropped in a blute solution of sodium chloride ?

(d) ferrous sulphate solution is added to an aqueous solution of sodium hydroxide.

(e) solid lead nitrate is heated ?

(f) when dilute sulphuric acid is added to barium chloride solution ?

Write the balanced chemical equations for the following reactions.
(A) Calcium hydroxide + Carbon dioxide → Calcium carbonate + water
(B) Zinc + Silver nitrate → Zinc nitrate + Silver
(C) Aluminium + copper chloride → Aluminium chloride + Copper
(D) Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride.

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Question 7 Which of the following solutions will not make the bulb in Fig glow? (a) Sodium chlorides (b) Copper sulphate (c) Silver nitrate (d) Sugar solution in diluted water

The answer is (d). Sugar solution in diluted water does not make ions and is a poor conductor of electricity. Therefore, it will not make the current to flow through it and the bulb will not glow.

Question 7

Which of the following solutions will not make the bulb in Fig glow?

(a) Sodium chlorides
(b) Copper sulphate
(c) Silver nitrate
(d) Sugar solution in diluted water

The answer is (d).
Sugar solution in diluted water does not make ions and is a poor conductor of electricity. Therefore, it will not make the current to flow through it and the bulb will not glow.