Question

() Name the gas that is produced in each of the following cases.
(i) sodium propionate is heated with soda lime.
(11) potassium sulphite is treated with dilute hydrochloric acid.
(iii) Sulphur is treated with concentrated nitric acid.
(iv) a few crystals of KNO, are heated in a hard glass test tube.
(v) concentrated hydrochloric acid is made to react with manganese dioxide.
(g) From the list given below, select the word(s) required to correctly complete blanks (i) to (v) in the
following passage. The words from the list are to be used only once. Write the answers as (a) (i), (ii),
(ii) and so on. Do not copy the passage.
(ammonia, ammonium, carbonate, carbon dioxide, hydrogen, hydronium, hydroxide, precipitate, salt, water
(1) A solution M turns blue litmus red, so it must contain (i) ............... ions; another solution O turns
red litmus blue and hence, must contain (ii) ............... ions.
(ii) When solution M and O are mixed together, the products will be (iii) ............... and (iv) ..
(iii) If a piece of magnesium was put into a solution M, (v) ............... gas would be evolved.​

Answer 1

Answer:

1)ethane

2)so2

3)no2

4)no2

5)h2o

1.hydronium

2.hydroxide

3.salt and water

4.hydrogen

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