Photolysis is a decomposition reaction caused by __________

(a)

heat

(b)

electricity

(c)

light

(d)

mechanical energy

A single displacement reaction is represented by X_(s) + 2HCl_(aq) → XCl_2(aq) + H_2(g). Which of the following(s) could be X. (i) Zn (ii) Ag (iii) Cu (iv) Mg. Choose the best pair.

(a)

i and ii

(b)

ii and iii

(c)

iii and iv

(d)

i and iv

Which of the following represents a precipitation reaction?

(a)

A_(s) + B_(s) → C_(s) + D_(s)

(b)

A_(s) + B_(aq) → C_(aq) + D_(l)

(c)

A_(aq) + B_(aq) → C_(s) + D_(aq)

(d)

A_(aq) + B_(s) → C_(aq) + D_(l)

The product formed when calcium oxide reacts with water is

(a)

Slaked lime

(b)

Carbon dioxide

(c)

Calcium oxide

(d)

Oxygen gas

An element 'A' on exposure to moist air turns to form compound 'B' which is reddish brown. Identify 'A' and 'B'.

(a)

'A' is Ag, 'B' is Ag_2s

(b)

'A' is Cu, 'B' is CuO

(c)

'A' is Mg, 'B' is MgO

(d)

'A' is Fe, 'B' is Fe₂O₃

Match the list I with list II and select the correct answer using the code given below the lists.

List I	List II
A) Thermolysis	1) 2AgBr ⟶ 2Ag + Br
B) Photolysis	2) HNO3 + NH4OH ⟶ NH4NO3 + H2O
C) Electrolysis	3) 2HgO ⟶ 2Hg + O2
D) Neutralization	4) 2NaCl ⟶ 2Na + Cl2

(a)

	A	B	C	D
(a)	4	1	2	3

(b)

	A	B	C	D
(b)	2	4	1	3

(c)

	A	B	C	D
(c)	3	1	4	2

(d)

	A	B	C	D
(d)	4	3	2	1

Formation of ammonia from nitrogen and hydrogen is an example of __________ reaction.

(a)

Thermal decomposition

(b)

Combination

(c)

Precipitation

(d)

Displacement

When Zinc metal is placed in hydrochloric acid, the gas evolved is _________________

(a)

CO

(b)

CO₂

(c)

H₂

(d)

H₂O

Pb(NO₃)₂ + 2KI ⟶ Pbl₂ + 2KNO₃ is a ______________ reaction

(a)

neutralization

(b)

Precipitation

(c)

decomposition

(d)

Combustion

The value of ionic product of water at 25°C is ____________

(a)

1.00 x 10¹⁴

(b)

1.00 x 10^-14

(c)

1.00 X 10⁴

(d)

1.00 X 10^-4