# GATE (TF) Textile 2014 Question Paper Solution | GATE/2014/TF/51

###### Question 51 (Textile Engineering & Fibre Science)

The Barium Activity Number (BAN) was determined using the standard procedure. For this, 30 ml of 0.25N Ba(OH)2 solution was used, in each of the three titrations, i.e. (a) blank titration, (b) back titration where mercerized fabric sample was immersed and (c) back titration where unmercerized fabric sample was immersed in Ba(OH)2 solution. If the volume (ml) of 0.1 N HCI consumed was 10, 1 and 4.5 respectively, the BAN of mercerized sample, accurate to one decimal place, is ……………….

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Given in the question-
blank titration volume(b)=10

Back titration with mercerized fabric(m)=1

Back titration with unmercerized fabric(n)=4.5

BAN=?

Formula:

Barium Activity Number(BAN)=[(b-m)/(b-n)] x 100

Barium Activity Number(BAN)=[(10-1)/(10-4.5)] x 100

Barium Activity Number(BAN)=[(9)/(5.5)] x 100

Barium Activity Number(BAN)=[1.6363] x 100

Barium Activity Number(BAN)=163.6

Barium Activity Number(BAN)=164 (Answer, accurate to one decimal number)