|
Write the balanced equations for the following:
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|
1
|
638
|
November 3, 2016
|
|
Arrange the following in the order of property indicated against each set
|
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1
|
769
|
November 3, 2016
|
|
Sea is the greatest source hf some halogens. Comment
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0
|
992
|
November 3, 2016
|
|
An amorphous solid A burns in air to form a gas B which turns lime water milky
|
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1
|
10751
|
November 3, 2016
|
|
Identify the green and pink coloured compounds giving sequence of reactions
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|
1
|
1073
|
November 3, 2016
|
|
How can you account for the formation of a large number of oxides having O2 - species not O-?
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|
1
|
1914
|
November 3, 2016
|
|
How is the presence of $S{{O}_{2}}$ detected?
|
|
0
|
891
|
November 3, 2016
|
|
$S{ F }_{ 6 }$ is inert towards hydrolysis. Why?
|
|
1
|
2580
|
November 3, 2016
|
|
Which one has higher bond angle and why?
|
|
1
|
592
|
November 3, 2016
|
|
What are the oxidation states of phosphorus in the following compounds?
|
|
1
|
2102
|
November 3, 2016
|
|
Why does the reactivity of nitrogen different from phosphorus?
|
|
1
|
2193
|
November 3, 2016
|
|
Write a balanced equation for the hydrolytic reaction
|
|
1
|
734
|
November 3, 2016
|
|
Identify A and B, and write the formulae of their hydrolysis products
|
|
1
|
2180
|
November 3, 2016
|
|
Why is nitrous acid oxidant as well as reductant?
|
|
0
|
6482
|
November 3, 2016
|
|
Bond angle in $P{ H }_{ 4 }$ is higher than that in $P{ H }_{ 3 }$. Why?
|
|
0
|
2771
|
November 3, 2016
|
|
Nitric oxide becomes brown when released in air. Why?
|
|
1
|
8690
|
November 3, 2016
|
|
Why does nitrogen show catenation property less than phosphorus?
|
|
1
|
2186
|
November 3, 2016
|
|
Why are pentahalides more covalent than trihalides?
|
|
1
|
4289
|
November 3, 2016
|
|
Why does$NH _{ 3}$ form hydrogen bonding but $PH _{ 3}$ does not?
|
|
1
|
540
|
November 2, 2016
|
|
Account for the following
|
|
1
|
1603
|
November 2, 2016
|
|
Explain why $NH _{3 }$ is basic while $BiH _{3 }$ is only feebly basic?
|
|
0
|
622
|
November 2, 2016
|
|
Name the common elements present as anode
|
|
1
|
834
|
November 2, 2016
|
|
Write the chemical equations for the involved reactions
|
|
1
|
1489
|
November 2, 2016
|
|
Write chemical reactions taking place in the extraction of zinc from zinc blende
|
|
0
|
1435
|
November 2, 2016
|
|
Write down the reactions taking place in different zones in the blast furnace during the extraction of iron
|
|
0
|
2472
|
November 2, 2016
|
|
What is the role of graphite rods in the electrometallurgy of aluminium?
|
|
0
|
1806
|
November 2, 2016
|
|
What should be the considerations during the extraction of metals by electrochemical method?
|
|
0
|
1937
|
November 2, 2016
|
|
Name the processes from which chlorine is obtained as a byproduct
|
|
1
|
3564
|
November 2, 2016
|
|
Which of the following metals cannot be extracted by the smelting process: Al, Zn, Fe and Pb. Give reason
|
|
0
|
4259
|
November 2, 2016
|
|
Why is zinc not extracted from zinc oxide through reduction using CO?
|
|
0
|
1387
|
November 2, 2016
|