1.
Match the type of reaction given in column I with the reactions
given in column II.
| I |
II |
| 1.
Displacement reaction |
A.2H2S(g)
+ SO2(g) —> 3S+ 2H2O(l) |
| 2.
Double displacement reaction |
B.
NH3 + HCl —> NH4Cl |
| 3.
Combination reaction |
C.
3CaCl2 + 2K3PO4 —> Ca3(PO4)2 + 6KCl |
| 4.
Redox reaction |
D.
Mg(s) + CuSO4(aq) —> MgSO4(aq) + Cu(s) |
| 5.
Decomposition reaction |
E.
2H2O2 —> 2H2O + O2 |
2.
Burning of petrol in a car (homogeneous / heterogeneous).
3.
CaCO3(s) —> CaO(s) + CO2(g)
(exothermic / endothermic)
4.
2HgO(s) —>2Hg(l) + O2(g) (reversible
/ irreversible)
5.
Bursting of crackers (slow / fast)
6..
A reversible reaction at a stage when concentration of reactants
and products is changing (equilibrium state /non-equilibrium
state)
7.
A substance AB is formed by reaction between an acid X and
a base Y along with water. The cation and anion of the compound
AB are monovalent.
1. What type of substance is AB?
2. Which one out of AB, X and Y would turn red litmus blue?
3. Which one out of AB, X and Y would have sour taste?
8.
Aqueous solution of a substance does not conduct electricity
through it. What type of substance is it?
9.
A substance completely dissociates in to ions when dissolved
in water. What type of substance is it?
10.
X is a strong acid while Y is a weak acid. In whose aqueous
solution a dynamic equilibrium will be established?
11.
In an aqueous solution
[H+] = [OH–]
What type of solution is it, acidic, basic or neutral?
12.
pH of a solution is 4. What is the hydrogen ion concentration
in it?
