Iron fillings and sulphur were mixed together and divided into two parts, 'A' and 'B'. Part 'A' was heated strongly while Part 'B' was not heated . Dilute hydrochloric acid was added to both the Parts and evolution of gas was seen in both the cases. How will you identify the gases evolved?
When iron fillings and sulphur is heated it will give the following reaction:
$Fe(s)+S(s) → FeS$
When HCl is added to this mixture Ferric chloride is produced and Hydrogen sulphide gas is produced. A foul rotten egg smell of Hydrogen sulphide is the indicator of H2S production.
$FeS + 2HCl \rightarrow FeCl_2 + H_2S$
When dilute HCl is added to this setup B, Hydrogen gas is evolved and sulphur does not take part in the reaction. When a burning matchstick is brought near the evolved gas, the matchstick burns with a pop. This is the indication of the production of Hydrogen gas.
$Fe + 2HCl \rightarrow FeCl_2 + H_2$
Related Articles
- Iron powder and sulphur powder were mixed together and divided into two parts A and B. When part A was heated strongly over a burner, then a substance C was formed. The part B was, however, not heated at all. When dilute hydrochloric acid was added to substance C, then gas D was evolved and when dilute hydrochloric acid was added to part B then gas E was evolved.(a) What type of substance is B?(b) What type of substance is C?(c) Name the gas (i) D, and (ii) E?(d) State one characteristic property of gas D.(e) Write one test to identify gas E.
- Ethanoic acid was added in drops to water and it was noticed that:
- An amount was divided into two proportions in the ratio 5: 11. If the difference in the amount was rupees 1800, what was the total amount and what were the proportions ?
- Divide 72 into two parts, so that the larger part exceeds the smaller part by 12. Find both the parts.
- While lighting a candle, Paheli observed the following changes.Wax was meltingCandle was burningSize of the candle was reducingMelted wax was getting solidified.Of the above, the changes that can be reversed are(a) (i) and (ii)(b) (ii) and (iii)(c) (iii) and (iv)(d) (i) and (iv)
- Amit and Sunil were doing an experiment in which water was to be heated in a beaker. Amit kept the beaker near the wick in the yellow part of the candle flame. Sunil kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time? Why?
- Abida and Ramesh were doing an experiment in which water was to be heated in a beaker. Abida kept the beaker near the wick in the yellow part of the candle flame. Ramesh kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time?
- Name the gas evolved when zinc granules are treated/heated with:(a) Hydrochloric acid solution(b) Sodium hydroxide solution
- (a) Where and when was the world’s first oil well drilled?(b) Where and when was oil first struck in India?
- 5 mL of dilute acetic acid were added to 5 mL of water and mixture was shaken for one minute. It was observed that :(1)the turbidity appeared in the test tube(2)the acid formed a separate layer at the bottom(3) water formed a separate layer at the bottom(4)a clear solution was formed
- Ethanoic acid was added to sodium hydrogen-carbonate solution and the gas evolved was tested with a burning splinter. The following four observations were reported:(a) The gas burns with the pop sound and the flame gets extinguished.(b) The gas does not burn but the splinter burns with a pop sound.(c) The flame extinguishes and the gas does not burn.(d) The gas burns with a blue flame and the splinter burns brightly.The correct observation is reported in :(1) (a) (2) (b)(3) (c) (4) (d)
- Nylon was made in 1931 and Rayon was made in 1880. So, how was nylon is the first synthetic fibre?
Kickstart Your Career
Get certified by completing the course
Get Started