1
IIT-JEE 1981
Subjective
+3
-0
Balance the following Equations:

(i) Cu2O + H+ + $$NO_3^ - \to $$ Cu2+ + NO + H2O

(ii) K4[Fe(CN)6] + H2SO4 + H2O $$\to$$ K2SO4 + FeSO4 + (NH4)2SO4 + CO

(iii) C2H5OH + I2 + OH- $$\to$$ CHI3 + $$HCO_3^-$$ + I- + 4H2O
2
IIT-JEE 1981
Subjective
+3
-0
A 1.00 gm sample of H2O2 solution containing X percent H2O2 by weight requires X ml of a KMnO4 solution for complete oxidation under acidic conditions. Calculate the normality of the KMnO4 solution.
3
IIT-JEE 1980
Subjective
+2
-0
A hydrocarbon contains 10.5 g of carbon per gram of hydrogen. 1 litre of the hydrocarbon at 127oC and 1 atmosphere weighs 2.8 g. Find the molecular formula.
4
IIT-JEE 1980
Subjective
+2
-0
Find
(i) The total number of neutrons and
(ii) The total mass of neutron in 7 mg of 14C
(Assume that mass of neutron = mass of hydrogen atom)
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