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CBSE Notes 2011-2012

Chilly hot questions of chemistry 10

Following questions are challenge to readers (students) -
1- Which is the lightest liquid metal ?
2- Give chemical reaction of formation of scum ?
3- Give four isomers of molecular formula C2H4O2 ?
4- Which chemical is added during formation of soaps so that dust particles remain suspended while washing cloths ?
5- What do you mean by heteroatom ?
6- Who gave vital force theory and who disproved it in which year by which method ?
7- What is the melting and boiling point of diamond ?
8- Who had discovered buckminsterfullerene in which year ?
9- What is the prefix for alcohol ?
10- Artificial flavour for orange is obtained from which ester ?
11- Give dicarboxylic reaction of ethanoic acid ?
12- Why noble gases do not have least atomic size in a period ?
13- Differ between electron affinity and electronegativity and which elements are leading in each field ?
14- Mendeleev had given seperate group for transitional elements but some of them are in other groups like mercury,gold etc. Can you say that it is also a demerit of mendeleev's classification ?
15- Solubility of alcohol in water is due to which property of it ?
16- Give structural formula of TNT ?
If you know answers them reply must. NITIN

Himani Garg's picture
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Joined: 05/02/2011
answer

9 . it does not form anion and not cation
it shares the electron with others

Himani Garg's picture
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answer

4 . common salt
nacl
1. mercury hg

Nitin MVM's picture
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Joined: 20/02/2011
Correctness of your answers

Your answers (4 and 1) are wrong.

Nitin Kumar

carbon gupta's picture
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Joined: 31/03/2011
12. bcoz they are very

12. bcoz they are very inert..

rohit gupta

rakshu_1997's picture
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Joined: 15/02/2012
formula for TNT-C6H2(NO2)3CH3

formula for TNT-C6H2(NO2)3CH3