Ncert Solutions Chemistry Class 12th
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New answer posted
a month agoContributor-Level 10
Zn2+ has no unpaired electron and colourless in aqueous solution.
New answer posted
a month agoContributor-Level 10
KCN
R – X + KCN
R – X + AgCN
KCN is ionic therefore ionised and attack occurs through carbon.
AgCN is covalent therefore attack starts with Nitrogen.
New answer posted
a month agoContributor-Level 10
Order of reactivity towards electrophile
Strength of +M/+R : –OH > –CH3 > –Cl
In case of halogens, their –I effect dominates over
+M hence –Cl is deactivating and is lesser reactive than for incoming electrophile.
New answer posted
a month agoContributor-Level 10
This is an example of chromyl chloride test
K2Cr2O7 + 4KCl + 6H2SO4? 6KHSO4 + 2CrO2Cl2 + 3H2O
Oxidation state of Cr is +6.
New answer posted
a month agoContributor-Level 10
A, B and C are correct.
Mn2O7 is a green oil at room temperature.
V2O4 react with acids to give VO2+.
CrO is Basic and CrO3 is acidic.
V2O5 react with acids as well as alkali.
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