1.
Urea is mainly used as:
A
Fuel
B
Fertilizer
C
Explosive
D
Solvent
2.
A catalyst at equilibrium:
A
Shifts equilibrium
B
Stops reaction
C
Does not change equilibrium position
D
Consumes reactants
3.
The atmosphere mainly consists of:
A
Oxygen
B
Carbon dioxide
C
Nitrogen
D
Hydrogen
4.
A substance that can donate a proton is called:
A
Lewis acid
B
Arrhenius base
C
Bronsted–Lowry acid
D
Bronsted–Lowry base
5.
According to Arrhenius theory, an acid is a substance that produces:
A
OH⁻ ions in water
B
H⁺ ions in water
C
Salt in water
D
Electrons
6.
At equilibrium, the concentration of reactants and products:
A
Are always equal
B
Become zero
C
Remain constant with time
D
Increase continuously
7.
A substance that accepts a proton is known as:
A
Bronsted–Lowry base
B
Arrhenius acid
C
Lewis acid
D
Neutral compound
8.
Which substance is used to neutralize acidic soil?
A
Sodium chloride
B
Calcium carbonate
C
Ammonium sulphate
D
Nitric acid
9.
A strong acid is one that:
A
Partially ionizes
B
Completely ionizes
C
Does not ionize
D
Forms salts only
10.
The main function of fertilizers is to:
A
Kill pests
B
Increase soil fertility
C
Control pollution
D
Increase rainfall
11.
Which of the following is a strong base?
A
NH₄OH
B
NaOH
C
Al(OH)₃
D
Mg(OH)₂
12.
Le Chatelier’s principle states that when a system at equilibrium is disturbed:
A
It stops reacting
B
It adjusts to counteract the change
C
It decomposes
D
Temperature remains unchanged
13.
Chemical equilibrium is called dynamic because:
A
The reaction stops completely
B
Forward and reverse reactions continue at equal rates
C
Reactants are used up
D
Products decompose continuously
14.
Fractional distillation of petroleum separates components based on:
A
Density
B
Melting point
C
Boiling point
D
Solubility
15.
Which industrial product is obtained from sulphuric acid?
A
Soap
B
Fertilizers
C
Glass
D
Cement
16.
An increase in temperature favors the:
A
Endothermic reaction
B
Exothermic reaction
C
Neutral reaction
D
No reaction
17.
The major cause of air pollution in cities is:
A
Forest fires
B
Volcanoes
C
Vehicle exhaust
D
Rainfall
18.
A buffer solution resists change in:
A
Temperature
B
Pressure
C
pH
D
Volume
19.
The raw material for urea manufacture includes:
A
Ammonia and carbon dioxide
B
Nitrogen and oxygen
C
Sulphur dioxide
D
Methane only
20.
The equilibrium constant (Kc) is expressed in terms of:
A
Initial concentrations
B
Equilibrium concentrations
C
Rate of reaction
D
Temperature only