Questions

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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6 7759
Q:

Of the following tree structure, which is, efficient considering space and time complexities?

A) Incomplete Binary Tree B) Complete Binary Tree
C) Full Binary Tree D) None
 
Answer & Explanation Answer: B) Complete Binary Tree

Explanation:

Full binary tree loses its nature when operations of insertions and deletions are done. For incomplete binary trees, extra storage is required and overhead of NULL node checking takes place. So complete binary tree is the better one since the property of complete binary tree is maintained even after operations like additions and deletions are done on it.

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Filed Under: Software Testing

6 7758
Q:

64 S on CB?

Answer

The given statement implies that 64 Squares on Carrom Board.

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Q:

The following SQL is which type of join: SELECT CUSTOMER_T. CUSTOMER_ID, ORDER_T. CUSTOMER_ID, NAME, ORDER_ID FROM CUSTOMER_T,ORDER_T ;

A) Equi-join B) Natural join
C) Outer join D) Cartesian join
 
Answer & Explanation Answer: D) Cartesian join

Explanation:
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Filed Under: Database

7 7741
Q:

Milk is an example of a

A) Emulsion B) Solution
C) Gel D) Suspension
 
Answer & Explanation Answer: A) Emulsion

Explanation:

Milk is an emulsion of oil in water (o/w).


Emulsion: A suspension of droplets of one liquid in another.

Constituents of milk :

The principal constituents of milk are water, fat, proteins, lactose (milk sugar) and minerals (salts). Milk also contains trace amounts of other substances such as pigments, enzymes, vitamins, phospholipids (substances with fatlike properties), and gases.

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Filed Under: Chemistry
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10 7738
Q:

The Constituent Assembly of India started functioning from

A) 9th December,1946 B) 1st January, 1947
C) 26th January, 1947 D) 15th August, 1947
 
Answer & Explanation Answer: A) 9th December,1946

Explanation:
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Filed Under: Indian Politics

12 7736
Q:

In which of the following mammals estrous cycle is absent ?

A) Rabbit B) Horse
C) Cow D) Monkey
 
Answer & Explanation Answer: D) Monkey

Explanation:
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Filed Under: Biology
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19 7734
Q:

Which one of the following cities is called the 'zero mile centre ' of India

A) Kanpur B) Allahabad
C) New Delhi D) Nagpur
 
Answer & Explanation Answer: D) Nagpur

Explanation:
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Filed Under: Indian Geography

16 7731