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All posts related to Science

Rohit Aggarwal
Shared from JEE Main Mock - 2 on Dec 18, 2019 5:38 PM

Consider Zn + Cu2+ Zn2+ + Cu
If the standard emf is
The decrease in the free energy () for the process in kJ mol-1 is

 
386
308
194
104
Please type your answer before submitting.

The answer is 386. there is a calculation error in the solution

Gagandeep
Shared from CTET Mock (Math & Science) - 1 on Dec 05, 2019 3:47 PM

The current gain for a transistor in common emitter configuration is 59. If the emitter current is 6.0 mA, the collector current will be

 
5.9 mA
0.1 mA
6.1 mA
6.0 mA
Please type your answer before submitting.

You are right 

I Can't
Shared from Kinetic Theory of Gases on Nov 27, 2019 7:50 AM

A sample of 5.6 litres of helium gas at STP is adiabatically compressed to 0.7 litre. Taking the initial temperature to be T1, the work done in the process is

 
RT1
RT1
RT1
RT1
Please type your answer before submitting.

The initial condition is STP so why is the answer in terms of a variable when it can be replaced with a constant term.

Anushka Mishra
Shared from IUPAC Nomenclature on Aug 28, 2019 5:03 PM

IUPAC name of the organic compound that is written by the following structure is ____.

 
3-Cyclohexyl-1-cyclopentylpropane
1-Cyclohexyl-3-cyclopentylpropane
3-Cyclopentylpropylcyclohexane
3-Cyclohexylpropylcyclopentane
Propylbicyclo[3.2.3]decane
Please type your answer before submitting.

Why? it should begin from cyclohexyl end according to alphabetical order

Abhisek Sen
Shared from IUPAC Nomenclature on Jul 14, 2019 11:38 PM

IUPAC name of the organic compound that is written by the following structure is ________.

 
3,4,9-trimethyldecane
2,7,8-trimethyldecane
2-ethyl-3,8-dimethylnonane
8-ethyl-2,7-dimethylnonane
2,7-dimethyl-8-ethylnonane
Please type your answer before submitting.

No the correct answer is 2,7,8-trimethyldecane, it is exceptional