Questions

Q:

A copper wire of radius r and length lhas a resistance of R. A second copper wire with radius 2r and length lis taken and the two wires  are  joined  in  a  parallel  combination. The  resultant  resistance   of  the  parallel combination of the two wires will be

A) 5 R B) 5 R/4
C) 4 R/5 D) R/5
 
Answer & Explanation Answer: D) R/5

Explanation:

1st copper wire: R = pl/A = pl/ πr2

2ndcopper wire: R’ = p’l’/A’ = pl/(4 πr2) = R/4

If joined in parallel, (1/Req) = (1/R) + (1/R’)

= 1/R + 4/R1/Req= 5/R

Req= R/5

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Filed Under: Physics
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Q:

The New Chief Minister of Himachal Pradesh 2017?

A) Anil Sharma B) Jairam Thakur
C) Sudhir Sharma D) Karan Singh
 
Answer & Explanation Answer: B) Jairam Thakur

Explanation:

Jairam Thakur was sworn-in as the Chief Minister of Himachal Pradesh on 27th December 2017 after virbhadra Singh. The cabinet, including Thakur, were administered the oath of office and secrecy by Governor Acharya Dev Vrat at the historic Ridge Ground in Shimla, the capital city of Himachal Pradesh.

 

Jai Ram is the first chief minister from the second largest Mandi district and the 14th chief minister and sixth person to adorn the office of the chief minister.

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Filed Under: Indian Politics
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Q:

Hypnology is the study of

A) blood B) nerves
C) sleep D) disease
 
Answer & Explanation Answer: C) sleep

Explanation:

Hypnology is the study of sleep.

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Filed Under: General Science
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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:

What are the Monomers that make up Proteins?

A) Amino acids B) Nucleotides
C) Disaccharides D) Chaperones
 
Answer & Explanation Answer: A) Amino acids

Explanation:

Proteins are long chains of Amino acids. That is in brief, Amino acids are the monomers of Proteins. Amino acids are compounds which contain both an amino group and a carboxylic group. Proteins are made up of 20 essential amino acids.

Monomer means a small molecule of an organic substance i.e, building block in general.

 

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Filed Under: Chemistry
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4 3203
Q:

Prahaar is a-

A) surface-to-surface missile B) aircraft carrier
C) submarine D) battle tank
 
Answer & Explanation Answer: A) surface-to-surface missile

Explanation:

Prahaar is a contemporary weapon system capable of carrying multiple types of warheads & neutralizing a wide variety of targets. It is a indigenously developed surface-to-surface tactical missile by DRDO.

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Filed Under: General Awareness
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Q:

Which Indian born scientist was awarded the Nobel prize in Astrophysics

A) Prof Chandra Shaker B) Sir C.V.Raman
C) Satyendra Nath Bose D) Vikram Sarabhai
 
Answer & Explanation Answer: A) Prof Chandra Shaker

Explanation:
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Filed Under: Books and Authors

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Q:

Fouaad Mirza is related to which sports?

A) Equestrian B) Long jump
C) Short throw D) Shooting
 
Answer & Explanation Answer: A) Equestrian

Explanation:

Fouaad Mirza is related to the game Equestrian. His show wins first medal to India in equestrian game. He clinched silver medal in the individual event of equestrian game in the Asian games 2018. 

 

Fouaad Mirza belongs to Bangaluru.

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Filed Under: Sports
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