bleaches damp blue litmus paper
forms a white preciptate with AgNO3(aq)
forms a white precipitate with BaCI2(aq)
turns moist red litmus paper blue
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HCl gas does not bleach litmus paper. It can only turn it red. On the other hand when HCl react with a solution of AgNO³, a white precipitate is formed. Due to this reasons, a think option B is a better answer.

pls admin the ansa is option b...becos wen h2so4 reacts wif nacl....the gas formed is hcl...and option b is de perfect test for hydrogen chloride....thanks

H2SO4+2NaCl=2HCl+Na2SO4
HCl is produced and it forms a white ppt with AgNO3
Ref: new school chemistry pg 356 and 359

Admin please correct this. The answer is B. You guys are making me fail too much
Bro write the two equations and balance it up then find d answer with right thought
I support A

For your info, HCl does not bleach blue litmus paper but only turns it red and when it reacts with AgNO^3, it thereby forms a white precipitate which makes B the correct answer.

Option A is correct as HCl gas produced bleaches damp blue litmus.
Options B and C are tentative but wrong since the question is not demanding for chloride ion which forms white ppt; rather the emphasis is on the gas evolved.
Chemistry is deeper than superficial reasoning.

HCl gas does not bleach litmus paper. It can only turn it red. On the other hand when HCl reacts with a solution of AgNO³, a white precipitate is formed. Due to this reasons, a think option B is a better answer.

