Question

hi friends please help me



1.name the substances which is used as a positive catalysts during the industrial production of ammonia?


2. when we add dilute hydrochloric acid to boiling with a hot solution of sodium thiosulphate, colour change is obtained. why?


3.identify more examples from daily life to illustrate the increases in rate of reaction with the increase in surface area?


4.sulphur pieces do not react with cold concentrated nitric acid . but sulphur powder reacts .why?


5.when dilute hcl reacts with marble pieces, a gas is formed. identify the gas?

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Answer 1

Answer:

(I)Sodium chloride

(ii)Because daily life work are very hard

(iii)