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All posts related to Chemistry

Mayur Gupta
Shared from Stoichiometry on Feb 09, 2019 8:50 PM

The following facts are available:



;

Which of the following options is correct?

 


Please type your answer before submitting.
Mayur Gupta

Answer A of this must be correct

Mayur Gupta
Shared from Stoichiometry on Feb 09, 2019 7:14 PM

Consider the reaction between potassium permanganate and a metal sulphite represented as follows.



Which of the following options about the process is correct?

 
1 mole of potassium permanganate oxidises 5 moles of the metal sulphite.
There is a net transfer of 5 electrons in the reaction.
20 mL of 0.5M KMnO4 solution can neutralise 10 mL of 0.25 M metal sulphite.
50 mL of KMnO4 can oxidise a 20 mL equimolar solution of the metal sulphite.
Please type your answer before submitting.
Mayur Gupta

Option C is wrong because equivalents of KMno4=50 while equivalents of metal sulphite=5

Anunay Choudhury
Shared from Organic Chemistry (Engineering E... on Jan 24, 2019 11:01 AM

Match the following:

Column I
Column II
P. Clemmensen's reduction 1. NH2NH2/base
Q. Wolf-Kishner's reduction 2. Zn-Hg/HCl
R. Meerwin-Pondorf-Verley's reduction 3. H2/Pd-BaSO4
S. Rossenmud's reduction 4. Aluminium isopropoxide

 
P - 1; Q - 2; R - 3; S - 4
P - 1; Q - 3; R - 2; S - 4
P - 2; Q - 1; R - 3; S - 4
P - 2; Q - 1; R - 3; S - 4
P - 2; Q - 4; R - 3; S - 1
Please type your answer before submitting.
Abhishek

C and d options are same..

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Anunay Choudhury
Shared from Organic Chemistry (Engineering E... on Jan 24, 2019 10:59 AM

Which of the following tests is used to determine the presence or absence of phenols in a given sample?

 
Carbylamine reaction
Lucas' test
Ferric chloride test
Beilstein's test
Molisch's test
Please type your answer before submitting.
Anunay Choudhury

Is the answer correct??

Sneha Harish
Shared from 7. Thermodynamics(11)_old on Jan 18, 2019 8:19 PM

 
163 kJ
- 163 kJ
- 326 kJ
326 kJ
Please type your answer before submitting.
Sneha Harish

You say -ve sign is not needed yet you have deducted marks?