|
Explain the difference in properties of diamond and graphite
|
|
1
|
3942
|
December 20, 2016
|
|
Account for the following questions given
|
|
1
|
397
|
December 20, 2016
|
|
A tetravalent element forms monoxide and dioxide with oxygen
|
|
1
|
780
|
December 20, 2016
|
|
Explain the following reactions
|
|
1
|
1484
|
December 20, 2016
|
|
The +1 oxidation state in group 13 and + 2 oxidation state in group 14
|
|
1
|
3333
|
December 20, 2016
|
|
Rationalise the given statements and give chemical reactions
|
|
1
|
781
|
December 20, 2016
|
|
What is the state of hybridisation of carbon in
|
|
1
|
1331
|
December 20, 2016
|
|
If a trivalent atom replaces a few silicon atoms in three dimensional network of silicon dioxide, what would be the type of charge on overall structure?
|
|
0
|
1545
|
December 19, 2016
|
|
How is excessive content of Carbondioxide responsible for global warming?
|
|
0
|
301
|
December 19, 2016
|
|
Carbon monoxide is readily absorbed
|
|
1
|
792
|
December 19, 2016
|
|
Give one chemical reaction to show that
|
|
1
|
1902
|
December 19, 2016
|
|
Account for following
|
|
1
|
430
|
December 19, 2016
|
|
Write the resonance structures
|
|
0
|
960
|
December 19, 2016
|
|
Explain why is there a phenomenal decrease in ionisation enthalpy from carbon to silicon?
|
|
0
|
2216
|
December 19, 2016
|
|
When metal X is treated with sodium hydroxide
|
|
1
|
5222
|
December 19, 2016
|
|
Identify the compounds A, X and Z in the following reactions
|
|
1
|
904
|
December 19, 2016
|
|
Write balanced equations for
|
|
1
|
472
|
December 19, 2016
|
|
A non-metallic element of group 13
|
|
1
|
1209
|
December 19, 2016
|
|
Explain the following Aluminium alloys are used to make aircraft body
|
|
1
|
3188
|
December 19, 2016
|
|
Aluminium trifluoride is insoluble anhydrous HF but dissolves on addition of NaF
|
|
1
|
1276
|
December 19, 2016
|
|
Boron fluoride exists
|
|
1
|
723
|
December 19, 2016
|
|
A compound (A) of boron reacts with $NMe_{ 3}$ to give an adduct
|
|
1
|
1203
|
December 19, 2016
|
|
When aqueous solution
|
|
1
|
1560
|
December 19, 2016
|
|
Why does gallium undergo disproportionation reactions?
|
|
0
|
3313
|
December 19, 2016
|
|
Discuss the pattern of variation in the oxidation states of B to Tl
|
|
0
|
1215
|
December 19, 2016
|
|
Why the elements of the second row
|
|
1
|
321
|
December 19, 2016
|
|
What is inert pair effect?
|
|
0
|
9240
|
December 19, 2016
|
|
Suggest reasons why the only binary compounds of the noble gases are fluorides and oxides of Kr, Xe and Rn?
|
|
0
|
2503
|
November 3, 2016
|
|
Xenon does not form fluorides such as $XeF _{3 }$ and $XeF _{5 }$. Why?
|
|
0
|
2048
|
November 3, 2016
|
|
Why do noble gases have comparatively large atomic sizes?
|
|
0
|
2353
|
November 3, 2016
|
