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 Organic Chemistry MCQs

Acetaldehyde cannot show ?

  • Iodoform test
  • Lucas test
  • Benedict’s test
  • Tollen’s test
0 Comments
Correct Answer: B. Lucas test

Explanation:

Acetaldehyde (CH₃CHO) is the simplest aliphatic aldehyde after formaldehyde. It shows characteristic reactions ... Read More Details

2 Organic Chemistry MCQs

The Clemmensen reduction of acetone yields ?

  • Ethanol
  • Ethanal
  • Propane
  • Propanol
0 Comments
Correct Answer: C. Propane

Explanation:

The Clemmensen reduction is an important name reaction in organic chemistry that involves ... Read More Details

3 Organic Chemistry MCQs

O₃ reacts with CH₂=CH₂ to form ozonide. On hydrolysis it forms ?

  • Ethylene oxide
  • HCHO
  • Ethylene glycol
  • Ethyl alcohol
0 Comments
Correct Answer: B. HCHO

Explanation:

Ozonolysis is a classical reaction of alkenes in which ozone (O₃) adds across ... Read More Details

4 Organic Chemistry MCQs

Dimethyl ketones are usually characterized through ?

  • Tollen’s reagent
  • Iodoform test
  • Schiff’s test
  • Benedict’s reagent
0 Comments
Correct Answer: B. Iodoform test

Explanation:

Dimethyl ketones, also known as acetone and its derivatives, are important members of ... Read More Details

5 Organic Chemistry MCQs

The typical reactions of aldehyde is ?

  • Electrophilic addition
  • Nucleophilic substitution
  • Nucleophilic addition
  • Nucleophilic elimination
0 Comments
Correct Answer: C. Nucleophilic addition

Explanation:

Aldehydes are organic compounds that contain the carbonyl group (C=O) with at least ... Read More Details

6 Organic Chemistry MCQs

Fehling solution react with HCHO to form precipitate of ?

  • White colour
  • Yellow colour
  • Red colour
  • Blue colour
0 Comments
Correct Answer: C. Red colour

Explanation:

Fehling’s solution is a chemical reagent used to test for the presence of ... Read More Details

7 Organic Chemistry MCQs

In Aldehydes and Ketones, carbon of carbonyl group is ?

  • sp³ hybridised
  • sp² hybridised
  • sp hybridised
  • Unhybridised
0 Comments
Correct Answer: B. sp² hybridised

Explanation:

The carbonyl group (C=O) is the defining feature of aldehydes and ketones. In ... Read More Details

8 Physical Chemistry MCQs

The process by which a substance absorbs moisture upon exposure to atmosphere is called?

  • Efflorescence
  • Dehydrogenation
  • Desalination
  • Deliquescence
0 Comments
Correct Answer: D. Deliquescence

Explanation:

When certain solid substances are exposed to the atmosphere, they interact with water ... Read More Details

9 Organic Chemistry MCQs

Amino acids are a product of the digestion of?

  • Carbohydrates
  • Fats
  • Proteins
  • Vitamins
0 Comments
Correct Answer: C. Proteins

Explanation:

Proteins are complex biological macromolecules made of long chains of amino acids. During ... Read More Details

10 English MCQs

She hurried to the supermarket ___ she might get some things ___ it closed.

  • in order to; before
  • so that; before
  • for; by
  • so that; at
0 Comments
Correct Answer: B. so that; before

Explanation: ...

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