Questions

Q:

Order of basicity of amines

Answer

The order of basicity for primary, secondary and tertiary amines are:


Secondary > Primary > Tertiary > NH3


 


* Amines are basic in nature as they have lone pair of electrons on nitrogen. Therefore, they have a strong tendency to donate this lone pair of electrons to electron acceptors.


* The stability of conjugate acids formed is dependent on the extent of H-bonding,and greater the number of H-atoms on N more stable is the conjugate acid.


* The conjugate acid of primary amine is the most stable with greater number (3) of H-bonds than > Secondary > tertiary. But primary amines are less basic than secondary as the electron density on the N atom is less and lone pair of electrons are not readily available for protonation.


* The two opposing factors i.e. the stability of conjugate acids formed and ease of availability of electrons for Protonation, balance each other in case of secondary amines and it is most basic.

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Subject: Chemistry Exam Prep: AIEEE , Bank Exams
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Q:

Dry ice is an example of which process

A) Condensation B) Evaporation
C) Sublimation D) Freezing
 
Answer & Explanation Answer: C) Sublimation

Explanation:

Sublimation is a process when a solid changes directly into gas instead changing into liquid first. Dry ice is an example of Sublimation process because it doesn't change into liquid CO2 and directly change into gaseous CO2 when heated.

 

Hence, Dry ice is an example of Sublimation process. 

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Q:

Which of these is Not a Carcinogen?

A) Cadmium B) Asbestos
C) Benzene D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

Asbestos can cause

    •  Lungs
    • Gastrointestinal tract  types of Cancer.

Benzene can cause

    • Leukemia
    • Hodgkin's lymphoma types of Cancer.

Cadmium can cause

    • Prostate type of Cancer.
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Filed Under: Biology
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Q:

Which of these is an example of personification?

A) The moon smiled at me B) This shirt is as white as snow
C) Water is as hot as sun D) It is like a soft butter
 
Answer & Explanation Answer: A) The moon smiled at me

Explanation:

"The moon smiled at me" is the example of personification in the given options.

 

Personification is a technique in which we give objects human traits like emotions, gestures, speech,... by using metaphor. 

Here moon is an object which cannot smile but using metaphor sense, we gave that sense to it.

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Filed Under: English
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Q:

Which mobile company throw out its employee, who allegedly insulted Indian flag in March 2017 ?

A) Apple B) Samsung
C) Motorola D) Oppo
 
Answer & Explanation Answer: D) Oppo

Explanation:
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Q:

Who is appointed as new Deputy Governor of RBI in place of R. Gandhi in March, 2017 ?

A) Shrugdi Vilas B) BP Kanungo
C) Harun R. Khan D) Mundra
 
Answer & Explanation Answer: B) BP Kanungo

Explanation:

BP Kanungo was appointed as Deputy Governor in Reserve Bank of India (RBI) for three years. The Appointments Committee of Cabinet (ACC) has approved his appointment to the post with effect from the date of taking over the charge on or after April 3, an order issued by Personnel Ministry said. He has been appointed in place of R Gandhi, it said.
Kanungo was in March last year appointed as Executive Director in the central bank.

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Q:

Who has won the Hero Indian Golf Open 2017 ?

A) Gavin Green B) S.S.P. Chawrasia
C) Anirban Lahiri D) Scott Jamieson
 
Answer & Explanation Answer: B) S.S.P. Chawrasia

Explanation:

Chawrasia, became the first Indian to successfully defend a European Tour title and the first player to win their first four events in their home country.

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Q:

Which of the following Schemes was launched to promote basic education in India and attract children in School going age to attend the classes?

A) Pulse Polio Abhiyan B) Operation Flood
C) Mid-Day Meal Schema D) Operation Black Board
 
Answer & Explanation Answer: C) Mid-Day Meal Schema

Explanation:
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