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Q:

What causes brownian motion in colloids?

A) coagulation of particles and the dispersed phase B) erratic flashes of light
C) molecules of the dispersion medium colliding with dispersed phase particles D) All the above
 
Answer & Explanation Answer: C) molecules of the dispersion medium colliding with dispersed phase particles

Explanation:

When their is a colloid in the solution, then it will show the Brownian movement, such as dust particle in the air will show the Brownian movement.

 

Hence, Brownian movement arises due to the impact of the molecules of the dispersion medium with the colloidal particles. It has been postulated that the impact of the molecules of dispersion medium on the colloidal particles are unequal.

 

This leads to the zig-zag (random) motion of the colloidal particles.

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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

Explanation:
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Filed Under: Chemistry
Exam Prep: Bank Exams

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Q:

"Gilt-edged" means ___________.

 

A) bullion market   B) market of government securities  
C) market of guns D) market of pure metals
 
Answer & Explanation Answer: B) market of government securities  

Explanation:
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Filed Under: Indian Economy
Exam Prep: Bank Exams

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Q:

Find the acceleration (in m/s2) of a body which accelerates from 15 m/s to 40 m/s in 2 seconds.

 

A) 12.5 B) 27.5  
C) 25 D) 55
 
Answer & Explanation Answer: A) 12.5

Explanation:
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Filed Under: Physics
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Q:

Who invented fuel cells in 1839?

A) Buckminster Fuller B) Sir William Grove
C) Sylvester Graham D) Joyce Hall
 
Answer & Explanation Answer: B) Sir William Grove

Explanation:
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Filed Under: Inventions

11 6009
Q:

Solve this logical Math puzzle?

logical_thinking_puzzle1536132282.jpg image

Answer

Let that something be 'x'


From the given data,


x + x/5 = 21


5x + x/5 = 21


6x = 21 x 5


=> x = 17.5


 


Hence, that something is x = 17.5.

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Subject: Math Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE
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8 6005
Q:

When you travel in certain parts of India, you will  notice red soil. What is the main reason for this colour?

A) Abundance of magnesium B) Accumulated humus
C) Presence of ferric oxides D) Abundance of Phosphates
 
Answer & Explanation Answer: C) Presence of ferric oxides

Explanation:
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Filed Under: Indian Geography

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Q:

One fathom is equal to how many meters ? 

A) 1.7699 B) 2.0210
C) 1.8288 D) 2.1212
 
Answer & Explanation Answer: C) 1.8288

Explanation:

One fathom = 1.8288 meters = 6 feet

A fathom is a unit of length used especially for measuring the depth of water.

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Filed Under: General Science
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24 6005