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Applications of Electrolysis and Electrolytic Cell

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Question

A student performed the reactions of metals X and Y with hydrochloric acid. He observed that the reaction was much faster in the case of the metal X. Identify X and Y from the options given below.

A

X: Potassium, Y: Magnesium

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B

X: Iron, Y: Magnesium

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C

X: Gold, Y: Iron

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D

X: Magnesium, Y: Sodium

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Solution

The correct option is A X: Potassium, Y: Magnesium

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Similar questions

Q. (a) What are metals? Name five metals.
(b) Name a metal which is so soft that it can be cut with a knife.
(c) Name the metal which is the best conductor of heat and electricity.
(d) What happens when a metal reacts with dilute hydrochloric acid? Explain with the help of an example.
(e) Write the equations for the reaction of:
(i) Magnesium with dilute hydrochloric acid
(ii) Aluminium with dilute hydrochloric acid
(iii) Zinc with dilute hydrochloric acid
(iv) Iron with dilute hydrochloric acid
Name the products formed in each case. Also indicate the physical states of all the substances involved.

Q. A student was given Mg, Fe, Zn, and Au metals. Identify the metal from the following that will not produce hydrogen gas on reaction with dil. HCl.

Q. Rajesh dropped a soft metal with valency one in water. He observed the formation of bubbles in the mixture. He made the same observation when this metal was added to dilute hydrochloric acid.
Identify the metal.
Suggest how he can identify the gas.
Write a balance chemical equation to show the reaction of this metal with dilute hydrochloric acid.
Name the base formed when the metal was added to water.
Name two metals that will not react with dilute acid.

Q. It was found that metal P reacts with dilute hydrochloric acid to form respective salts along with the evolution of a gas which burns with a pop sound. Further experiment on metal P concluded that, it can react with bases too. From the given options, identify metal P.

(a) Iron
(b) Zinc
(c) Copper

Q. Observe the reaction given below and identify the missing product from the options given.

Magnesium + Hydrochloric acid

\to

Magnesium chloride + ?

a. Hydrogen
b. Chlorine
c. Nitrogen
d. Oxygen

[1 mark]

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