Science and Technology MCQs

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Science and Technology MCQs

Practice Science and Technology MCQs with answers and detailed explanations covering scientific inventions, technological advancements, space missions, information technology, biotechnology, artificial intelligence, discoveries, innovations and current developments frequently asked in SSC, Railway, Banking, UPSC, JKSSB, Police, Defence, Teaching and other competitive examinations.

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Total Questions

Practice Questions

Page 13 of 24
Question #241
What is the atomic number of Gold?
A. 29
B. 80
C. 79
D. 47
Discuss
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Correct Answer: Option C

Explanation:
Gold has the atomic number 79.
This question belongs to: Static General Knowledge Science and Technology
Question #242
Which acid is present in the human stomach?
A. Sulfuric acid
B. Hydrochloric acid
C. Nitric acid
D. Citric acid
Discuss
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Correct Answer: Option B

Explanation:
Hydrochloric acid (HCl) is secreted by the stomach to aid digestion.
This question belongs to: Static General Knowledge Science and Technology
Question #243
Which of these is the largest mammal?
A. Blue Whale
B. Hippopotamus
C. Giraffe
D. Elephant
Discuss
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Correct Answer: Option A

Explanation:
The Blue Whale is the largest animal known to have ever existed.
This question belongs to: Static General Knowledge Science and Technology
Question #244
What is the primary function of chlorophyll in plants?
A. Absorbing sunlight
B. Releasing oxygen
C. Storing food
D. Absorbing water
Discuss
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Correct Answer: Option A

Explanation:
Chlorophyll is a pigment that absorbs light energy to drive photosynthesis.
This question belongs to: Static General Knowledge Science and Technology
Question #245
Which of the following is a non-renewable energy source?
A. Wind
B. Coal
C. Solar
D. Geothermal
Discuss
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Correct Answer: Option B

Explanation:
Coal is a fossil fuel and takes millions of years to form, making it non-renewable.
This question belongs to: Static General Knowledge Science and Technology
Question #246
What is the study of mushrooms called?
A. Virology
B. Bacteriology
C. Phycology
D. Mycology
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Correct Answer: Option D

Explanation:
Mycology is the study of fungi, including mushrooms.
This question belongs to: Static General Knowledge Science and Technology
Question #247
Which gas is used in the preparation of soda water?
A. Oxygen
B. Hydrogen
C. Nitrogen
D. Carbon Dioxide
Discuss
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Correct Answer: Option D

Explanation:
Carbon dioxide is dissolved in water under high pressure to make carbonated (soda) water.
This question belongs to: Static General Knowledge Science and Technology
Question #248
Which of these is a common viral disease?
A. Tetanus
B. Tuberculosis
C. Influenza
D. Cholera
Discuss
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Correct Answer: Option C

Explanation:
Influenza, commonly known as the flu, is caused by influenza viruses.
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Question #249
What is the freezing point of water in Celsius?
A. 100°C
B. 0°C
C. -10°C
D. 32°C
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Correct Answer: Option B

Explanation:
Water freezes at 0 degrees Celsius at atmospheric pressure.
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Question #250
Which metal is liquid at room temperature?
A. Bromine
B. Sodium
C. Mercury
D. Gallium
Discuss
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Correct Answer: Option C

Explanation:
Mercury is the only metal that is liquid at standard temperature and pressure.
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Question #251
Which planet is known as the 'Red Planet'?
A. Venus
B. Mars
C. Saturn
D. Jupiter
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Correct Answer: Option B

Explanation:
Mars appears reddish due to iron oxide (rust) on its surface.
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Question #252
What is the chemical symbol for Iron?
A. Fe
B. F
C. Ir
D. In
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Correct Answer: Option A

Explanation:
The symbol for Iron is Fe, derived from the Latin word 'ferrum'.
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Question #253
Which gas makes the sky look blue?
A. Oxygen
B. Argon
C. Carbon Dioxide
D. Nitrogen
Discuss
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Correct Answer: Option D

Explanation:
Rayleigh scattering, where sunlight interacts with molecules (primarily nitrogen), causes the sky to appear blue.
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Question #254
What is the unit of pressure?
A. Newton
B. Pascal
C. Watt
D. Joule
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Correct Answer: Option B

Explanation:
The Pascal (Pa) is the SI unit of pressure.
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Question #255
Which organ cleans the blood in our body?
A. Stomach
B. Kidney
C. Heart
D. Lungs
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Correct Answer: Option B

Explanation:
The kidneys filter the blood, removing wastes and balancing electrolytes.
This question belongs to: Static General Knowledge Science and Technology
Question #256
Who is known as the father of modern computers?
A. Bill Gates
B. Charles Babbage
C. Steve Jobs
D. Alan Turing
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Correct Answer: Option B

Explanation:
Charles Babbage is considered the father of computing for his designs of the Analytical Engine.
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Question #257
Which of these is a renewable energy source?
A. Natural Gas
B. Nuclear
C. Coal
D. Wind
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Correct Answer: Option D

Explanation:
Wind energy is inexhaustible, making it a renewable source.
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Question #258
What is the ph value of pure water?
A. 7
B. 10
C. 5
D. 9
Discuss
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Correct Answer: Option A

Explanation:
A pH of 7 is neutral, which is the value for pure water.
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Question #259
What does 'WWW' stand for?
A. World Web Wide
B. Web World Wide
C. Wide World Web
D. World Wide Web
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Correct Answer: Option D

Explanation:
WWW stands for World Wide Web, the global system of linked hypertext documents.
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Question #260
Which planet is the largest in our solar system?
A. Saturn
B. Neptune
C. Jupiter
D. Earth
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Correct Answer: Option C

Explanation:
Jupiter is the largest planet in our solar system.
This question belongs to: Static General Knowledge Science and Technology

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Who discovered the existence of the atomic nucleus through the famous Gold Foil Experiment?
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