GATE Questions

Q:

How does molecular shape affect polarity?

Answer

Polarity :: 


The polarity of a molecule defines its other physical properties such as melting point, boiling point, surface tension, vapor pressure etc... Simply, polarity occurs when the electron distribution in a molecule is asymmetric. This results in a net dipole moment in the molecule. One end of the molecule is charged negative while the other gets a positive charge.


 


The polarization of a molecule greatly depends on the shape of the molecule. A diatomic molecule like HF mentioned above has no issue of shape. The net dipole moment is only due to the uneven distribution of electrons between the two atoms. However, when there are more than two atoms involved in making a bond, there are many complexities.


 


The water molecule is of bent shape. Therefore, when the two pair of electrons shared by oxygen with two hydrogen atoms is pulled towards oxygen, the net dipole moment results in the direction of the oxygen atom. There is no other force to cancel out the resultant dipole moment. Hence, the water molecule is highly polar.


 


Ammonia molecule is of a pyramid shape and the electronegative N atom pulls the electrons towards itself. The three N-H bonds are not in the same plane; hence the dipole moments created do not get canceled out. This makes ammonia a polar molecule.


 


However, the dipole moments sometimes get canceled due to the shape of the molecules, making the molecule non-polar. Carbon dioxide is such a molecule.

Report Error

View answer Workspace Report Error Discuss

Subject: Chemistry Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

4 1993
Q:

In what year was pluto devoted to a draft planet?

A) 2005 B) 2006
C) 2008 D) 2009
 
Answer & Explanation Answer: B) 2006

Explanation:

In 2006, pluto devoted to a draft planet.

Report Error

View Answer Report Error Discuss

Filed Under: General Science
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

0 1992
Q:

Choose the word which is different from the rest?

A) Shimla B) Nagaland
C) Kohima D) Imphal
 
Answer & Explanation Answer: B) Nagaland

Explanation:

Except Nagaland all other options are capital cities of the states in India. Nagaland is the north eastern state with Kohima as its capital city.

 

* Shimla is the capital city of Himachal Pradesh. 

* Imphal is the capital city of Manipur.

Report Error

View Answer Report Error Discuss

Filed Under: Indian Geography
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

0 1992
Q:

What can be swallowed but can swallow you?

Answer

Your Pride. Yes, you can swallow your pride or it can swallow you.

Report Error

View answer Workspace Report Error Discuss

Subject: Word Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

2 1989
Q:

What goes in dry and comes out wet?

Answer

A Bath towel or a tea bag are suitable answers.

Report Error

View answer Workspace Report Error Discuss

Subject: Word Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE , TOEFL
Job Role: Analyst , Bank Clerk , Bank PO , IT Trainer

1 1988
Q:

The process of bones increasing in width is known as

A) appositional growth B) concentric growth
C) closing of the epiphyseal plate D) long bones reaching adult length and width
 
Answer & Explanation Answer: A) appositional growth

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Biology
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

4 1987
Q:

An example of an extensive property of matter is

A) Volume B) Mass
C) Density D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

Any properties that are dependent on the amount of matter are called as extensive properties of matter.


Examples are :: Mass, Volume, Density (M/V),...

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

0 1986
Q:

Who is the founder and also first Chairman of the ISRO, it was established in 1969?

A) Vikram Sarabhai B) A P J Abdul Kalam
C) Homi J Bhabha D) Satish Dhawan
 
Answer & Explanation Answer: A) Vikram Sarabhai

Explanation:

The founder and also first Chairman of the ISRO is Vikram Sarabhai.

Report Error

View Answer Report Error Discuss

Filed Under: General Awareness
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

0 1985