Questions

Q:

Covalent bonds hold atoms together because they 

A) fill shells without giving atoms much charge B) bring electrons closer to protons
C) Both A & B D) use forces between nuclei as well as forces between electrons
 
Answer & Explanation Answer: C) Both A & B

Explanation:

Covalent bonds hold atoms together because the attraction between the positively charged nuclei and the negatively charged shared electrons is greater than the repulsions between the nuclei themselves.

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Filed Under: Chemistry
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Q:

Frictional force acts in 

A) the same direction as the motion B) the opposite direction of the motion
C) all the directions D) upward direction
 
Answer & Explanation Answer: B) the opposite direction of the motion

Explanation:

It is to overcome this opposite frictional force , that  we have to apply the needed force to make the body move

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Filed Under: Physics

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Q:

Electromagnetic waves are transverse in nature is evident by

A) Reflection B) Polarisation
C) interference D) Diffraction
 
Answer & Explanation Answer: B) Polarisation

Explanation:
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Q:

Who invented the battery?

A) John Wilkinson B) Alessandro Volta
C) James Hargreaves D) Thomas Edison
 
Answer & Explanation Answer: B) Alessandro Volta

Explanation:
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Filed Under: Inventions

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Q:

A body given with an initial velocity moved under the effect of gravity is called?

Answer

Projectile

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Subject: Physics

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Q:

Cretinism is due to the disorder of the glands

A) Thymus B) Parathyroid
C) Thyroid D) Adrenal
 
Answer & Explanation Answer: C) Thyroid

Explanation:

Cretinism is a disease caused by hypothyroidism(less thyroxine formation).The symptoms of the disease are retardation  of mental, physical and sexual developments. Potbellt, protruding tongue, dry skin etc are also indicative of this disease.

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Filed Under: Biology

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Q:

Who is known as father of  Biology

A) Aristotle B) Darwin
C) Lamark D) Linneus
 
Answer & Explanation Answer: A) Aristotle

Explanation:
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Filed Under: Biology

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Q:

What structure separates the colon from the small intestine?

what_structure_separates_the_colon_from_the_small_intestine1539329010.jpg image

A) ileocecal valve B) Epiglottis
C) Sphincter D) None of the above
 
Answer & Explanation Answer: A) ileocecal valve

Explanation:
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Filed Under: Biology
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