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Q:

Place these hydrocarbons in order of decreasing boiling point.

1. Paraffin

2. Octadecane

3. Hexane

4. Neohexane and

5. Ethane

A) Paraffin > Octadecane > Neohexane > Hexane > Ethane B) Paraffin > Octadecane > Hexane > Neohexane > Ethane
C) Hexane > Paraffin > Octadecane > Neohexane > Ethane D) None of the above
 
Answer & Explanation Answer: B) Paraffin > Octadecane > Hexane > Neohexane > Ethane

Explanation:

In hydrocarbon, the boiling point directly varies with the length of carbon chain. On increasing the number of carbon atom, the boiling point of the compound also increases. Paraffin contains highest number of carbon atoms whereas, ethane is comprised of two carbon atoms.

 

The decreasing order of boiling point of mention compounds is written as follows:

Paraffin > Octadecane > Hexane > Neohexane > Ethane

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Filed Under: Chemistry
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10 45656
Q:

What will be output of following c code?

#include <stdio.h>
int main()

{
    int x=123;
    int i={
         printf("c" "++")
    };
    for(x=0;x<=i;x++){
         printf("%x ",x);
    }
    return 0;

}

Answer

Output: c++0 1 2 3

Explanation: First printf function will print: c++ and return 3 to variable i.For loop will execute three time and printf function will print 0, 1, 2 respectively.

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Subject: Programming

68 45420
Q:

The Indian Parliament cannot legislate on a subject of State List unless:

1. The president of India directs it to do so

2. The Rajya Sabha passes a resolution that it necessary to do so in national interest.

3. The Speaker of the Vidhan Sabha certifies that the Legislation is necessary 

4. There is national emergency

Consider the above statements, select the correct answer from the codes given below

A) 1, 2 and 3 B) 2, 3 and 4
C) 1 and 2 D) 2 and 4
 
Answer & Explanation Answer: D) 2 and 4

Explanation:
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Filed Under: Indian Politics

13 45115
Q:

Who have the power to decide an election petition?

A) Parliament B) Supreme Court
C) High Courts D) Election Commission
 
Answer & Explanation Answer: C) High Courts

Explanation:
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Filed Under: Indian Politics

175 44950
Q:

At 3.40, the hour hand and the minute hand of a clock form an angle of:

A) 120 degrees B) 125 degrees
C) 130 degrees D) 135 degrees
 
Answer & Explanation Answer: C) 130 degrees

Explanation:

Angle traced by hour hand in 12 hrs. = 360º.

 

Angle traced by it in  11/3 hrs=  36012*113°=110°

 

Angle traced by minute hand in 60 min. = 360º.

 

Angle traced by it in 40 min. =(360/60*40)°=240°

 

  Required angle (240 - 110)º = 130º.

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Filed Under: Clock puzzles

149 44805
Q:

Give the common name for the following compound

CH32CH CH2 - Br

A) Isobutyl bromide B) Methyl bromide
C) Propyl bromide D) Butyl bromide
 
Answer & Explanation Answer: A) Isobutyl bromide

Explanation:
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Filed Under: Chemistry
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7 44424
Q:

Solve this number puzzle?

 

Number_puzzle_31537767337.jpg image

A) 40 B) 44
C) 60 D) 56
 
Answer & Explanation Answer: A) 40

Explanation:

The given puzzle follows a logic that,

2 + 10 = 24 => 2 + 10 = 12 x 2 = 24

3 + 6 = 27 => 3 + 6 = 9 x 3 = 27

7 + 2 = 63 = 7 + 2 = 9 x 7 = 63

 

Similarly, 5 + 3 = 40 => 5 + 3 = 8 x 5 = 40.

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Filed Under: Number Puzzles
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87 44376
Q:

Which animal do not make any sound?

Answer

Which_animal_do_not_make_any_sound1541394022.jpg image


Giraffe is the animal that do not make any sound.

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Subject: Animals and Birds Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

876 44136