General Science Questions

Q:

Which one of the following types of laser is used in laser printers?

A) Semiconductor laser B) Dye laser
C) Gas laser D) Excimer laser
 
Answer & Explanation Answer: A) Semiconductor laser

Explanation:
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Q:

Which of the following parts of the sun is easily visible only during a total solar eclipse? 

A) core B) photosphere
C) sunspots D) corona
 
Answer & Explanation Answer: D) corona

Explanation:
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Q:

Potassium Permanganate is used for purifying drinking water, because

A) it is a sterilising agent B) it dissolves the impurities of water
C) it is a reducing agent D) it is an oxidising agent
 
Answer & Explanation Answer: D) it is an oxidising agent

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Q:

Which of the following has got more heat capacity?

A) Iron piece B) Water
C) Gold piece D) Benzene
 
Answer & Explanation Answer: B) Water

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Q:

The radioactive element most commonly detected in humans is

A) potassium-40 B) cobalt-60
C) iodine-131 D) plutonium-238
 
Answer & Explanation Answer: A) potassium-40

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Q:

The gases used in different types of welding would include

A) oxygen and hydrogen B) oxygen and acetylene
C) oxygen, acetylene and argon D) oxygen, hydrogen, acetylene and nitrogen
 
Answer & Explanation Answer: B) oxygen and acetylene

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Q:

Select the four statements about Plasmodium that are true.

 

A)  Inside an infected mosquito, haploid gametes fuse, forming a diploid zygote that develops into an oocyst

B) Plasmodium cells infect two specific types of cells in humans.

C) Inside an infected mosquito, haploid gametes fuse, forming a haploid zygote that develops into an oocyst.

D) When a mosquito bites a human with malaria, diploid Plasmodium cells enter the mosquito.

E) Plasmodium cells are transferred to humans through mosquito saliva.

F) The life cycle of Plasmodium involves only haploid forms.

G) The complete life cycle of Plasmodium requires two hosts.

A) A, B, E, G B) A, C, F, G
C) B, C, D, F D) None of the above
 
Answer & Explanation Answer: A) A, B, E, G

Explanation:

Plasmodium is a genus of unicellular eukaryotes that are obligate parasites of vertebrates and insects. 

From the above given options, A, B, E, G are TRUE regarding Plasmodium.

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Q:

The Ozone Layer restricts from

A) Infrared Rays B) Radio waves
C) Ultraviolet Radiation D) X-Rays and Gamma Rays
 
Answer & Explanation Answer: C) Ultraviolet Radiation

Explanation:

The Ozone layer which is present in the Earth's atmosphere protects it by restricting from UV or Ultraviolet radiation, the dangerous rays contained by Sun.

the_ozone_layer_restricts_us_from1542267550.jpg image

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