|
Calculate the oxidation number of sulphur chromium and nitrogen in ${{H}_{2}}$S${{O}_{5}}$, ${{Cr}_{2}}$${{O}_{7}}^{2-}$, N${{O}_{3}}^{-}$. Suggest structure of these compounds. Count for the fallacy
|
|
0
|
1392
|
August 12, 2016
|
|
Give one example of a chemical reaction which is not a redox reaction. Write chemical equation also
|
|
1
|
5181
|
August 12, 2016
|
|
Assign oxidation number to the underlined elements in each of the following species
|
|
1
|
3946
|
August 12, 2016
|
|
Assign and sum of the oxidation number various atoms to Cr
|
|
0
|
446
|
August 12, 2016
|
|
What is the oxidation state of K in K${{O}_{2}}$?
|
|
0
|
537
|
August 12, 2016
|
|
What is salt hydrolysis ? Explain hydrolysis of salts of:
|
|
1
|
5273
|
August 12, 2016
|
|
Define lewis Acids and bases with example, (b) The values of Ks„ of two sparingly soluble salts
|
|
0
|
1316
|
August 12, 2016
|
|
An organic Base X has ${{K}_{b}}$, equal to 1 X ${{10}^{-8}}$. In what amount should .01M HQ and .01M solution of Xbe mixed to prepare 1 litre of a buffer solution having pH 7?
|
|
0
|
551
|
August 12, 2016
|
|
Calculate the pH of a solution obtained by mixing 50 ml of 0.1M NaOH with 100 ml of 0.1M
|
|
0
|
3782
|
August 12, 2016
|
|
Calculate the pH of a solution obtained by mixing of 100 ml of 0.1 M HCl and 100 ml of 0.2 M
|
|
0
|
6878
|
August 12, 2016
|
|
How much volume of 0.2 M solution of acetic acid should be added to 100 ml of 0.2 M solution of sodium acetate to prepare a Buffer solution of pH 5. pK„ for acetic acid is 4.74?
|
|
0
|
4395
|
August 12, 2016
|
|
What should be the ratio of concentrations of formate ion and formic add in a buffer solution so that its pH should be 4 ? Around what pH will this buffer have maximum buffer capacity ? K„ = 1.8 x ${{10}^{-4}}$?
|
|
0
|
1282
|
August 12, 2016
|
|
Calculate the pH of a solution which is 0.1M in HA and 0.5 M in NaA. K„ for HA is 1.8 X ${{10}^{-6}}$?
|
|
0
|
2574
|
August 12, 2016
|
|
If 35.0 c${{m}^{3}}$ of 0-050 M Ba(N${{({{O}_{3}})}_{2}}$) are mixed with 25.0 c${{m}^{3}}$ of 0.020 M NaF, will any Ba${{F}_{2}}$ precipitate of Ba${{F}_{2}}$ is 1.7 x ${{10}^{-6}}$ at 298 K
|
|
0
|
596
|
August 12, 2016
|
|
What is the maximum concentration of equimolar solutions of ferrous sulphate and sodium sulphide so that when mixed in equal volumes, there is no precipitation of iron sulphide ? (For iron sulphide K= 6.3 X${{10}^{-8}}$ )
|
|
0
|
1858
|
August 12, 2016
|
|
What is the minimum volume of water required to dissolve 1g?
|
|
0
|
1093
|
August 12, 2016
|
|
The ionization constant of chloroacetic acid is 1.35 x ${{10}^{-3}}$. What will be the pH of 0.1 M add and its 0.1M sodium salt solution?
|
|
0
|
3673
|
August 12, 2016
|
|
A 0.02 M solution of pyridinium hydrochloric has pH = 3.44. Calculate the ionization constant of pyridine
|
|
0
|
5095
|
August 12, 2016
|
|
Calculate the concentrations of strontium and hydroxyl ions
|
|
1
|
531
|
August 12, 2016
|
|
The equilibrium constant for the following reaction is 1.6 X 1${{10}_{5}}$ at 1024 K
|
|
1
|
3250
|
August 12, 2016
|
|
Calculate ${{K}_{c}}$ for this reaction at the above temperature?
|
|
1
|
578
|
August 12, 2016
|
|
(a) What happens when HCl gas is passed through the saturated solution of NaCl?
|
|
1
|
3847
|
August 12, 2016
|
|
Equal volumes of 0.002 m solutions of sodium iodate and cupric chlorate are mixed together will it lead to precipitation of copper iodate. ${{K}_{cp}}$ = 7.4 x ${{10}_{-8}}$
|
|
0
|
4837
|
August 12, 2016
|
|
Calculate the ratio of molarities
|
|
1
|
535
|
August 12, 2016
|
|
Account for the following:
|
|
1
|
579
|
August 12, 2016
|
|
Predict if the solution of the following salts are neutral, acidic or basic?
|
|
1
|
1444
|
August 12, 2016
|
|
Give examples of Acidic and Basic Buffers?
|
|
0
|
1092
|
August 12, 2016
|
|
What is the effect of increase of temperature on the pH of a Buffer solution?
|
|
0
|
619
|
August 12, 2016
|
|
What happens to the pH of Buffer solution on dilution?
|
|
0
|
552
|
August 12, 2016
|
|
(a) The reaction quotient of a reversible reaction is Q. and the equilibrium constant is K .What do you conclude from the reaction if <Kp?
|
|
1
|
891
|
August 12, 2016
|