10th Chemistry Chapter 1 Exercise Quiz
10th Chemistry Chapter 1 Chemical Equilibrium Exercise Quiz Online-topper.pk
Online quizzes are an excellent way to evaluate your understanding of Chemical Equilibrium, an essential topic in 10th-class chemistry. At Topper.pk, we provide quizzes designed to align with the latest syllabus, enabling students to grasp core concepts and prepare for their board exams and competitive exams like PPSC, NTS, and CSS. Alongside these quizzes, our YouTube channel, Asif Brain Academy, offers detailed video explanations for each question to ensure you master this topic. Visit Topper.pk and subscribe to Asif Brain Academy to access comprehensive study resources.
Solved Exercise MCQs for Chapter 1 Chemical Equilibrium
The characteristics of reversible reactions are many, except for the following one:
a
products never recombine to form reactants
b
they never complete
c
they proceed in both ways
d
they have a double arrow between reactants and products
In the lime kiln, the reaction CaCO₃ → CaO + CO₂ goes to completion because:
a
of high temperature
b
CaO is more stable than CaCO₃
c
COâ‚‚ escapes continuously
d
CaO is not dissociated
For the reaction, 2A(g) + B(g) ⇌ 3C(g), the expression for the equilibrium constant is:
a
[3C] / [2A][B]
b
[C]³ / [A]²[B]
c
[C]³[A]²[B]
d
[C]³ / [A]²[B]
When a system is at equilibrium state:
a
the concentration of reactants and products becomes equal
b
the opposing reactions (forward and reverse) stop
c
the rate of the reverse reaction becomes very low
d
the rates of the forward and reverse reactions become equal
Which one of the following statements is not correct about active mass?
a
rate of reaction is directly proportional to active mass
b
active mass is taken in molar concentration
c
active mass is represented by square brackets
d
active mass means total mass of substances
When the magnitude of Kc is very large, it indicates:
a
reaction mixture consists of almost all products
b
reaction mixture has almost all reactants
c
reaction has not gone to completion
d
reaction mixture has negligible products
When the magnitude of Kc is very small, it indicates:
a
equilibrium will never establish
b
all reactants will be converted to products
c
reaction will go to completion
d
the amount of products is negligible
Reactions with comparable amounts of reactants and products at equilibrium state have:
a
very small Kc value
b
very large Kc value
c
moderate Kc value
d
none of these
At dynamic equilibrium:
a
the reaction stops to proceed
b
the amounts of reactants and products are equal
c
the speeds of the forward and reverse reactions are equal
d
the reaction can no longer be reversed
In an irreversible reaction, dynamic equilibrium:
a
never establishes
b
establishes before the completion of reaction
c
establishes after the completion of reaction
d
establishes readily
A reverse reaction is one:
a
which proceeds from left to right
b
in which reactants react to form products
c
which slows down gradually
d
which speeds up gradually
Nitrogen and hydrogen reacted together to make ammonia:
N2 + 3H2 → 2NH3
Given Kc = 2.86 mol-2 dm6, what will be present in the equilibrium mixture?
a
NH3 only
b
N2, H2, and NH3
c
N2 and H2 only
d
H2 only
For a reaction between PCl3 and Cl2 to form PCl5, the units of Kc are:
a
mol-3 dm-3
b
mol-1 dm3
c
mol dm-3
d
mol-1 dm-3