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 Chemistry MCQs

Which statement about the ionosphere is correct?

  • Low density in morning, decreases more at night
  • High density in daytime, decreases at night
  • High density far above in day, increases at night
  • None of these
0 Comments
Correct Answer: B. High density in daytime, decreases at night

Explanation:

The ionosphere is a region of Earth’s upper atmosphere that extends roughly from ... Read More Details

2 Chemistry MCQs

Which layer extends from about 690 km to 10,000 km above Earth?

  • Troposphere
  • Mesosphere
  • Exosphere
  • Stratosphere
0 Comments
Correct Answer: C. Exosphere

Explanation:

The Earth’s atmosphere is divided into several layers based on temperature and composition. ... Read More Details

3 Chemistry MCQs

Atmospheric pressure is determined by the __________.

  • Mass of vertical column of gases
  • Mass of horizontal column of gases
  • Weight of vertical column of gases
  • Mass of vertical and weight of horizontal column of gases
0 Comments
Correct Answer: C. Weight of vertical column of gases

Explanation:

Atmospheric pressure is the pressure exerted by the air in Earth’s atmosphere on ... Read More Details

4 Chemistry MCQs

A planet can retain its atmosphere when __________.

  • Gravity is low and temperature is high
  • Gravity and temperature are both high
  • Gravity and temperature are constant
  • Gravity is high and temperature is low
0 Comments
Correct Answer: D. Gravity is high and temperature is low

Explanation:

The ability of a planet to retain an atmosphere depends mainly on two ... Read More Details

5 Chemistry MCQs

Titan (moon of Saturn) and Triton (moon of Neptune) have atmospheres mainly of __________.

  • Saturn, Jupiter, Hydrogen
  • Uranus, Neptune, Nitrogen
  • Saturn, Neptune, Nitrogen
  • Mars, Venus, Hydrogen
0 Comments
Correct Answer: C. Saturn, Neptune, Nitrogen

Explanation:

Both Titan, the largest moon of Saturn, and Triton, the largest moon of ... Read More Details

6 Chemistry MCQs

What happens to Pluto’s nitrogen and methane atmosphere when it moves farther from the Sun?

  • Absent
  • Plasma
  • Frozen
  • Volatile
0 Comments
Correct Answer: C. Frozen

Explanation:

Pluto’s atmosphere is very different from Earth’s. It is thin and primarily composed ... Read More Details

7 Chemistry MCQs

Lingxi-03, developed by Galaxy Space, was launched using which carrier rocket?

  • Long March-3D
  • Long March-2D
  • Vertical March-3D
  • Orbital March-2D
0 Comments
Correct Answer: B. Long March-2D

Explanation:

The Lingxi-03 satellite, developed by the Chinese private aerospace company Galaxy Space, was ... Read More Details

8 Inorganic Chemistry MCQs

In fireworks, the green flame is produced because of which element?

  • Sodium
  • Barium
  • Mercury
  • Potassium
0 Comments
Correct Answer: B. Barium

Explanation:

The green flame seen in fireworks is produced due to the presence of ... Read More Details

9 Inorganic Chemistry MCQs

Permanent hardness of water can be removed by adding which substance?

  • Chlorine
  • Washing Soda
  • Bleaching Powder
  • None of these
0 Comments
Correct Answer: B. Washing Soda

Explanation:

Water hardness is caused mainly by dissolved salts of calcium and magnesium. Hardness ... Read More Details

10 Inorganic Chemistry MCQs

Which two elements are most commonly used for making transistors?

  • Boron and Aluminium
  • Silicon and Germanium
  • Iridium and Tungsten
  • None of these
0 Comments
Correct Answer: B. Silicon and Germanium

Explanation:

The two elements most commonly used for making transistors are silicon (Si) and ... Read More Details

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