Science General Knowledge Questions and Answers
The instrument used to examine a person’s digestive tract is called_____.
(A) Oscilloscope
(B) Microscope
(C) Endoscope
(D) Radiograph
Correct Answer : C
Explanation :
A flexible tube called an endoscope is used to view different parts of the digestive tract. When passed through the mouth (as shown on the left), an endoscope can be used to examine the esophagus, stomach, and some of the small intestine.
______ is used in yellow lamp street lights.
(A) Neon
(B) Nitrogen
(C) Phosphorous
(D) Sodium
Correct Answer : D
Curd contains mainly______acid.
(A) Benzoic
(B) Fumaric
(C) Lactic
(D) Malic
Correct Answer : C
Which of the following nutrients do NOT provide energy for animals?
(A) Fats
(B) Carbohydrates
(C) Vitamins
(D) Proteins
Correct Answer : C
Explanation :
Vitamins do not provide energy as they are not stored in our bodies.
Which of the following acids is used in car batteries?
(A) Nitric acid
(B) Hydrochloric acid
(C) Sulphuric acid
(D) Hydrofloric acid
Correct Answer : C
Explanation :
sulphuric acid is used in car batteries.
The science that deals with the relationship of various organisms with their environment is known as?
(A) anthropology
(B) economics
(C) ecology
(D) geology
Correct Answer : C
Explanation :
Ecology is the study of the relationships between living organisms, including humans and their physical environment. The German scientist Earnst Haeckel was the first to use this word in 1869.
World Environmental Day is celebrated every year on:
(A) 5 May
(B) 5 June
(C) 5 July
(D) 18 July
Correct Answer : B
Explanation :
World Environment Day is celebrated on June 5 every year to remind people to save nature and the earth by stopping their non-environmentally friendly activities. Let's know more about this day, its history, significance, and theme.
Why it is not advisable to sleep under a tree at night?
(A) Release of less oxygen
(B) Release of more oxygen
(C) Release of carbon dioxide
(D) Release of carbon monoxide
Correct Answer : C
Explanation :
Sleeping under a tree is not advisable at night, since photosynthesis does not occur, oxygen is not being produced by the trees. In addition to this, the trees continue respiring thereby causing the amount of carbon dioxide to be increased and the amount of oxygen to be reduced.
Which one of the following organisms has a role in converting nitrates to free nitrogen?
(A) Pseudomonas
(B) Nitrosomonas
(C) Nitrobacter
(D) Rhizobium
Correct Answer : D
Explanation :
Nitrates are reduced back into nitrogen in the soil by a process called denitrification. This process is performed by bacteria like Pseudomonas denitrificans, etc.
Which of the following has a very strong aroma of the fruit?
(A) Ethyl acetate
(B) Methanol
(C) Methyl chloride
(D) Methanoic acid
Correct Answer : A
Explanation :
This colorless liquid has a characteristic sweet smell (similar to pear drops) and is used in glues, nail polish removers, and in the decaffeination process of tea and coffee. Ethyl acetate is the ester of ethanol and acetic acid; it is manufactured on a large scale for use as a solvent.
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Rajesh Bhatia
A Writer, Teacher and GK Expert. I am an M.A. & M.Ed. in English Literature and Political Science. I am highly keen and passionate about reading Indian History. Also, I like to mentor students about how to prepare for a competitive examination. Share your concerns with me by comment box. Also, you can ask anything at linkedin.com/in/rajesh-bhatia-7395a015b/.
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