Questions

Q:

____ are atoms/molecules/ions containing the same number of electrons.

 

A) Isotones B) Isotopes
C) Isoelectronic D) Valence Isoelectronic  
 
Answer & Explanation Answer: C) Isoelectronic

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Q:

What is the process of production of ovum in the females called?

 

A) Adolescence B) Menarche
C) Oogenesis D) Menstruation
 
Answer & Explanation Answer: C) Oogenesis

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Filed Under: Biology
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Q:

Which of the following statements are CORRECT?

 

I. Ethanol is a good solvent for organic compounds.

II. Boiling and melting points of ethanol are low with respect to water.

III. Ethanol is used tincture iodine

 

A) Only I and II B) Only I and III
C) Only II and III D) All I, II and III
 
Answer & Explanation Answer: D) All I, II and III

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Q:

Statement I :

A person may suffer from tuberculosis if she/he frequently visits crowded place.

Statement II :

Bacteria of tuberculosis spread through droplets by sneezing or coughing.

 

A) Both the statements are individually true and Statement II is the correct explanation of Statement I B) Both the statements are individually true but Statement II is not the correct explanation of Statement I
C) Statement I is true but Statement II is false D) Statement I is false but Statement II is true
 
Answer & Explanation Answer: D) Statement I is false but Statement II is true

Explanation:

Tuberculosis (TB) is caused by a type of bacterium called Mycobacterium tuberculosis.

It's spread when a person with active TB disease in their lungs coughs or sneezes and someone else inhales the expelled droplets, which contain TB bacteria.

One would have to spend prolonged periods (several hours) in close contact with an infected person to catch the infection yourself.For example, TB infections usually spread between family members who live in the same house. It would be highly unlikely for you to become infected by sitting next to an infected person on a bus or train. Hence, statement 1 is incorrect.

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Filed Under: Biology
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Q:

Find the similarity in the following :

 

Carbon, Silicon, Boron, Arsenic

 

A) All of them are gases B) All of them are non-metals
C) All of them are metals D) No similarity
 
Answer & Explanation Answer: B) All of them are non-metals

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Q:

Metals can be given different shapes according to our needs because they posses the properties of

 

A) Conductivity and sonorosity B) Malleability and ductility
C) Malleability and sonorosity D) Ductility and conductivity
 
Answer & Explanation Answer: B) Malleability and ductility

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Filed Under: Physics
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Q:

Apart from proposing atomic theory, what did John Dalton researched on?

 

A) Plants B) Colour blindness
C) Penicillin D) Plastic
 
Answer & Explanation Answer: B) Colour blindness

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Q:

The Sum of three consecutive numbers is 126.Find the highest number.

 

A) 41 B) 42
C) 43 D) 44
 
Answer & Explanation Answer: D) 44

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Filed Under: Inventions
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