Question

1. An element 'X' reacts with water to form it's oxide. A colourless gas is evolved. 'X' is a metal and is present in table salt.
a) What is X?
b) Name the gas evolved. How can you test for the gas evolved?
c) Give the balanced chemical equation for the reaction taking place.
d)Is the reaction exothermic or endothermic?

Answer 1

Answer:

Write the chemical reaction when iron reacts with dilute H2SO4. Solution: Hydrogen gas is liberated when dilute HCl is added to a reactive metal. 5. What would you observe when zinc is added to a solution of iron (II) sulphate?

Explanation:

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Answer 2

Answer:

a) X is Sodium (Na)

b) H2 is the gas evolved.

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c) 2Na + H2O ———> 2NaOH + H2

d) Heat is evolved during the reaction, hence it’s an EXOTHERMIC REACTION.