Chemistry
Select the word/s given below which are required to correctly complete the blanks — [ammonia, ammonium, carbonate, carbon dioxide, hydrogen, hydronium, hydroxide, precipitate, salt water] :
(i) 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.
Acids Bases Salts
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Answer
(i) A solultion M turns blue litmus red, so it must contain (i) hydronium ions ; another solution O turns red litmus blue and hence, must contain, (ii) hydroxide ions.
(ii) When solution M and O are mixed together, the products will be (iii) salt and (iv) water.
(iii) If a piece of magnesium was put into a solution M, (v) hydrogen gas would be evolved.
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C : Decomposition by acid
D : Double decomposition
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(iv) Zinc sulphate
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B : Sodium hydrogen sulphate
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(ii) A definite number of water molecules bound to some salts.
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