NEET Chemistry Redox Reactions Questions Solved


0.7 g of Na2CO3.xH2O were dissolved in water and the volume was made to 100mL, 20mL of this solution required 19.8 mL of N/10 HCl for complete neutralisation. The value of x is:

(a) 7

(b) 3

(c) 2

(d) 5

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(c) M eq. of Na2CO3.xH2O in 20 mL = 19.8x1/10

M eq. of Na2CO3.xH2O in 100 mL = 19.8x1/10x5

w/E*1000=19.8x1/10x5

or 0.7/M/2*1000=19.8/2

M=141.41

23x2+12+3x16+18x= 141.41

x=2

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