Question

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19. The figure given below
represents the experiment carried
out between conc. sulphuric acid and
sodium chloride, which react with
each other to form HCl gas. Blue
litmus paper is brought near the
mouth of the delivery tube to check
the presence of HCl acid but no
change is observed in the color of
litmus paper because:
O The litmus paper used is dry
O The litmus paper used is moist
o
Blue litmus paper does not change
its color with an acid.
The litmus paper is kept very close
to the mouth of the delivery tube
O​

Answer 1

Answer:

The litmus paper is kept very close to the mouth of the delivery tube

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