info@jobexams.pk
Job Exams Hero

Master Your JobExams with Confidence

Access thousands of practice questions, and improve your test-taking skills with our comprehensive MCQ platform. Whether you're preparing for FPSC, NTS, PPSC, CSS, or any other job test, Jobexams provides the study material you need to succeed. Start practicing now and boost your chances of acing your exams!

Browse Categories
Quick Results 0 found

Question Coming Soon!

"" isn't in our database yet, but we're adding new questions daily.

1 Physical Chemistry MCQs

Law of mass action was proposed by Goldberg and Peter Waage in ?

  • 1819
  • 1864
  • 1882
  • 1905
0 Comments
Correct Answer: B. 1864

Explanation:

The Law of Mass Action is one of the most important principles in ... Read More Details

2 Inorganic Chemistry MCQs

The product of the reaction between steam and a hydrocarbon in the presence of a nickel (Ni) catalyst at 900°C is ?

  • CO₂ + O₂
  • CO + H₂ (Water gas)
  • CO₃ + H₂O
  • Laughing Gas
0 Comments
Correct Answer: B. CO + H₂ (Water gas)

Explanation:

When a hydrocarbon reacts with steam in the presence of a nickel (Ni) ... Read More Details

3 Physical Chemistry MCQs

The decomposition of nitroglycerine is an example of:

  • Self-catalytic reaction
  • Enzyme-catalytic reaction
  • Autocatalytic reaction
  • Induced catalysis
0 Comments
Correct Answer: C. Autocatalytic reaction

Explanation:

The decomposition of nitroglycerine (C₃H₅N₃O₉) is a classic example of an autocatalytic reaction. ... Read More Details

4 Physical Chemistry MCQs

The phenomenon of negative catalysis is also known as:

  • Auto catalysis
  • Self catalysis
  • Inhibition
  • Enzyme catalysis
0 Comments
Correct Answer: C. Inhibition

Explanation:

In chemical kinetics, a catalyst is a substance that increases the speed of ... Read More Details

5 Physical Chemistry MCQs

Ostwald’s dilution law is applicable to:

  • All electrolytes
  • Strong electrolytes
  • Non-electrolytes
  • Weak electrolytes
0 Comments
Correct Answer: D. Weak electrolytes

Explanation:

Ostwald’s dilution law explains the relationship between the dissociation constant (Ka or Kb), ... Read More Details

6 Analytical Chemistry MCQs

The best indicator for titrating HCl with NH₄OH is?

  • Methyl orange
  • Litmus
  • Phenol red
  • Phenolphthalein
0 Comments
Correct Answer: A. Methyl orange

Explanation:

In acid–base titration, the choice of indicator depends on the strength of the ... Read More Details

7 Physical Chemistry MCQs

Species that are formed in one step of a reaction mechanism and used up in another step are called:

  • Catalyst
  • Intermediate
  • Inhibitor
  • Activated complex
0 Comments
Correct Answer: B. Intermediate

Explanation:

In chemical kinetics, a reaction mechanism is the step-by-step sequence of elementary reactions ... Read More Details

8 Inorganic Chemistry MCQs

Transition temperature for tin grey & tin white is: ?

  • 128.15°C
  • 18°C
  • 246.12°C
  • 96°C
0 Comments
Correct Answer: B. 18°C

Explanation:

Tin (Sn) is a chemical element that exists in different allotropic forms depending ... Read More Details

9 Physical Chemistry MCQs

Which of the following is a non-crystalline solid pair?

  • Diamond, wood
  • Glass, table salt
  • Wood, glass
  • Sucrose, glass
0 Comments
Correct Answer: C. Wood, glass

Explanation:

Solids are broadly classified into crystalline and non-crystalline (amorphous) solids. Crystalline solids have ... Read More Details

10 Chemistry MCQs

Actinides are the elements with atomic numbers from ?

  • 97 to 104
  • 101 to 115
  • 89 to 103
  • 36 to 43
0 Comments
Correct Answer: C. 89 to 103

Explanation:

The actinide series is a group of 15 chemical elements in the periodic ... Read More Details

Question Categories
General Knowledge Category MCQ'S
Computer Category MCQ'S
Chemistry Category MCQ'S
Pak Departmental Laws & Rules MCQs
Management Sciences MCQs