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Solution


Q.

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

 

Situations of daily life can be represented by equations in few variables. In the same way, chemical reactions can be represented with the help of symbols of elements and formulae of the substances involved. This method of writing a reaction is known as a chemical equation. The substances which combine to react are known as reactants and new substances produced are known as products. An unbalanced chemical equation needs to be balanced which means that an equal number of atoms of different elements are present in the reactant as well as in the product side. Most importantly, the formulae of the compounds are not altered while balancing the equation.

 

(iii) In the given balanced equation, the coefficients a, b, c, d respectively are:

aMg3N2 + b H2O ⟶ c Mg(OH)2 + d NH3
1 1, 3, 3, 2  
2 1, 6, 3, 2  
3 1, 2, 3, 2  
4 2, 3, 6, 2  

Ans.

(2)

1, 6, 3, 2