(a) sulphuric acid (b) sulphurous acid (c) hydrochloric acid (d B. Fill in the blanks : 1. Very thin foils of are used to decorate sweets. 2. Metals get tarnished when exposed to air due to the formation of an 3. The arrangement of metals in a series, in the decreasing order of their reactivity is called is formed on dissolving phosphorus pentoxide in water. 4. METALS AND NON-METALS A-53
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Answered by
1
Explanation:
Silver foil is used for decorating sweets called Vark.
On exposure to air, alkali metals get tarnished due to formation of oxides, hydroxides and carbonates on their surface.
Answered by
2
Answer:
Dilute sulphuric acid reacts with zinc granules to produce zinc sulphate and hydrogen gas
H
2
SO
4
(aq)+Zn(s)→ZnSO
4
(aq)+H
2
(g)
(b) Dilute hydrochloric acid reacts with magnesium ribbon to produce magnesium chloride and hydrogen gas.
2HCl(aq)+Mg(s)→MgCl
2
(aq)+H
2
(g)
(c) Dilute sulphuric acid reacts with aluminium powder to produce aluminium sulphate and hydrogen gas.
3H
2
SO
4
(aq)+2Al(s)→Al
2
(SO
4
)
3
(aq)+3H
2
(g)
(d) Dilute hydrochloric acid reacts with iron filings to produce ferric chloride and hydrogen gas.
6HCl(aq)+Fe(s)→2FeCl
3
(aq)+3H
2
(g)
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