Q. 225.0( 3 Votes )
Rahul adds aqueous solution of barium chloride to an aqueous solution of sodium sulphate. What would he observe?
When an aqueous solution of barium chloride reacts to an aqueous solution of sodium sulphate then precipitate of barium sulphate is formed along with sodium chloride because barium (Ba) is more reactive than Sodium (Na) so it will displaced to sodium from sodium sulphate. It is double displacement reaction.
BaCl2 + Na2SO4 BaSO4 + 2NaCl
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i. Give an example for a combination reaction which is exothermic.
ii. Identify the oxidising agent, reducing agent in the following reaction:
H2S + Cl2⇒ 2HCl + S
iii. Name the phenomenon due to which the taste and smell of oily food changes when kept for a long time in open. Suggest one method to prevent it.Xam idea - Science
In one of the industrial processes used for manufacture of sodium hydroxide, a gas X is formed as by-product. The gas X reacts with lime water to give a compound Y which is used as a bleaching agent in chemical industry. Identify X and Y giving the chemical equation of the reactions involved.Xam idea - Science
(a) What are X, Y and Z?
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Write the balanced chemical equations for the following reactions.
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b. Sodium hydrogen carbonate on reaction with hydrochloric acid gives sodium chloride, water and liberates carbon dioxide.
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(a) What could metal X be?
(b) What is powder Y?
(c) With which substance metal X combines to form powder Y?
(d) What is substance Z? Name one domestic use of substance Z.
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