|
Explain the difference in properties of diamond and graphite
|
|
1
|
4293
|
December 20, 2016
|
|
Account for the following questions given
|
|
1
|
682
|
December 20, 2016
|
|
A tetravalent element forms monoxide and dioxide with oxygen
|
|
1
|
1322
|
December 20, 2016
|
|
Explain the following reactions
|
|
1
|
2084
|
December 20, 2016
|
|
The +1 oxidation state in group 13 and + 2 oxidation state in group 14
|
|
1
|
3951
|
December 20, 2016
|
|
Rationalise the given statements and give chemical reactions
|
|
1
|
1110
|
December 20, 2016
|
|
What is the state of hybridisation of carbon in
|
|
1
|
1972
|
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
|
2663
|
December 19, 2016
|
|
How is excessive content of Carbondioxide responsible for global warming?
|
|
0
|
567
|
December 19, 2016
|
|
Carbon monoxide is readily absorbed
|
|
1
|
1496
|
December 19, 2016
|
|
Give one chemical reaction to show that
|
|
1
|
2525
|
December 19, 2016
|
|
Account for following
|
|
1
|
680
|
December 19, 2016
|
|
Write the resonance structures
|
|
0
|
2027
|
December 19, 2016
|
|
Explain why is there a phenomenal decrease in ionisation enthalpy from carbon to silicon?
|
|
0
|
2647
|
December 19, 2016
|
|
When metal X is treated with sodium hydroxide
|
|
1
|
7473
|
December 19, 2016
|
|
Identify the compounds A, X and Z in the following reactions
|
|
1
|
1480
|
December 19, 2016
|
|
Write balanced equations for
|
|
1
|
870
|
December 19, 2016
|
|
A non-metallic element of group 13
|
|
1
|
2123
|
December 19, 2016
|
|
Explain the following Aluminium alloys are used to make aircraft body
|
|
1
|
3781
|
December 19, 2016
|
|
Aluminium trifluoride is insoluble anhydrous HF but dissolves on addition of NaF
|
|
1
|
1701
|
December 19, 2016
|
|
Boron fluoride exists
|
|
1
|
1196
|
December 19, 2016
|
|
A compound (A) of boron reacts with $NMe_{ 3}$ to give an adduct
|
|
1
|
1799
|
December 19, 2016
|
|
When aqueous solution
|
|
1
|
2248
|
December 19, 2016
|
|
Why does gallium undergo disproportionation reactions?
|
|
0
|
6019
|
December 19, 2016
|
|
Discuss the pattern of variation in the oxidation states of B to Tl
|
|
0
|
2636
|
December 19, 2016
|
|
Why the elements of the second row
|
|
1
|
617
|
December 19, 2016
|
|
What is inert pair effect?
|
|
0
|
9630
|
December 19, 2016
|
|
Suggest reasons why the only binary compounds of the noble gases are fluorides and oxides of Kr, Xe and Rn?
|
|
0
|
3991
|
November 3, 2016
|
|
Xenon does not form fluorides such as $XeF _{3 }$ and $XeF _{5 }$. Why?
|
|
0
|
2509
|
November 3, 2016
|
|
Why do noble gases have comparatively large atomic sizes?
|
|
0
|
2775
|
November 3, 2016
|