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Solution


Q.

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

Metals exhibit their chemical properties as per their electron releasing tendency of atoms. The greater the tendency, the more is the reactivity. Metals react with oxygen, water, hydrogen, acids, etc. They act as reducing agents because they can lose electrons. Some reactions metals undergo are given in this Table:

1. Metal + Oxygen → Metal oxide
2. Metal + Water → Metal Hydroxide + Hydrogen
3. Metal + Acid (dil.) → Metal Salt + Hydrogen
4. Metal A + Salt Solution of Metal B → Salt solution of A + B (Displacement) 

 

(v) Food cans are coated with tin and not with zinc because:
1 Zinc is less reactive than tin  
2 Zinc has a higher melting point than tin  
3 Zinc is more reactive than tin  
4 Zine is costlier than tin  

Ans.

(3)