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Chemistry: Post your doubts here!

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View attachment 63883 View attachment 63884 View attachment 63885 View attachment 63886 View attachment 63887 I need help with these.

Can anyone explain why 30 isn’t C. According to what I’ve learnt about sigma bonds, 30 should be C.

Q 11
First balance the equation using oxidation states
5Sn(2+) + 2Mn(7+) ---------> 5Sn(4+) + 2Mn(2+)
moles of Sn= 0.05
0.05*(2/5) = 0.02 mol
thus option B

Q 24
Option D first add potassium cyanide ( better than HCN )
it will substitute Chlorine with CN
as we need to add one more Carbon in the chain
then for hydrolysis NaOH will be added to form the given product.

Q 27
When alkaline aqueous iodine is treated with 3 methyl butane it will form the following product.
111.png
Na will not be included as it only states alkaline not mentioned specific.

Q 30
Double bond is more stronger than single thus in poly(ethene) bonds are weaker and more weaker the bond is more longer it is.
 
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Yeah I understand what u r saying but what will be the final equation? It is not balancing using these figures
The simplest ratio of 4:2 is actually the value of n and p
These value are find using the above method
Then we would balance q
Finally we will balance the reactants (m)

This is the typical method followed when balancing the equation using Valancies
Turn to page 112 of the book and see worked examples
 
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im sure that A is wrong what about the rest, all of them are secondary alcohols and form geometric isomers.
the correct ans is C
 

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