# Aniket's Chemistry Challenges ( Part 1 )

Chemistry Level 5

The Question is simple and has been made taking the base reaction as decomposition of A. The products have to be identified by various experiments and I have also mixed some Atomic Structure in it. I Hope you will like to work with this question. :) ( 100% Original Question )

Compound $$A$$ on heating gives a mixture of gases and some moisture .I passed the mixture through alkaline pyragallol and the mixture weight reduced by 12 grams.

Then I passed the remaining mixture through starch paper and the mixture turned the starch paper blue. So I heated the mixture with conc. Caustic Soda to get compound $$F$$ and $$G$$ and some water. (Mol. Wt. Of $$F > G$$ ). I got x grams of $$G$$ and y grams of $$F$$ .

Now, I cooled the mixture to 99°C to remove moisture in the form of liquid water.

Then I was left with my last gas which I treated with $${CaC }_{2}$$ to get $$P$$ . $$P$$ on hydrolysis with hot water liberates a $$Q$$ which when added to $$\ce {Hg2Cl2 }$$ results on the formation of black ppt.

Also, $$Q$$ upon passing through excess of $${Ni}^{+2}$$ gives compound with colour $$z$$.

This colour $$z$$ is also observed when electron makes transition from $$n = a$$ to $$n = b$$ in Hydrogen atom and from $$n = c$$ to $$n = d$$ & $$n = e$$ to $$n = d$$ in $${Li}^{+2}$$ ion. Where c and e are the least 2 values of n of the many transitions to n = d .

Enter Your answer as : (mol. Wt. Of $$A$$ ) + ( weight of $$A$$ used ) + (no. of gaseous products (including moisture)) + (mol. Wt. Of last gas) + $$x + y + a + b + c + d + e$$.

Details and Assumptions

• All reactions are complete (no partial or reversible reaction)

• Refer to this periodic table for atomic weights . And take weights of elements to nearest integer , like for Lithium given weight is 6.9 you take 7.0 .

• Refer to this for evaluating a,b,c,d & e.

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