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Solution


Q.

Read the passage carefully and answer the following questions from (i) to (v):

 

During a chemical reaction, it is possible that one element takes the place of another element in a compound. Such reactions are called displacement reactions. Precisely, an element that is high in the Reactivity series displaces an element that is lower in the reactivity series. In single displacement reactions, only one element displaces the other element from its compound. The displacement reaction between iron(III) oxide and powdered aluminum produces so much heat that iron gets into its molten state

 

(ii) Characteristic of the gas evolved during the reaction of zinc with dilute sulphuric acid is:
1  Green in colour having a foul smell  
2  Green in colour having a foul smell  
3 Red in colour having a sweet smell  
4 Colourless, pungent-smelling and burns with a pop sound  

Ans.

(2)