1
JEE Advanced 2013 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-1

Concentrated nitric acid, upon long standing, turns yellow-brown due to the formation of

A
NO
B
NO2
C
N2O
D
N2O4
2
IIT-JEE 2012 Paper 2 Offline
MCQ (Single Correct Answer)
+3
-1

The reaction of white phosphorous with aqueous NaOH gives phosphine along with another phosphorus containing compound. The reaction type; the oxidation states of phosphorus in phosphine and the other product are, respectively,

A
redox reaction; $$-$$3 and $$-$$5
B
redox reaction; +3 and +5
C
disproportionation reaction; $$-$$3 and +1
D
disproportionation reaction; $$-$$3 and +3
3
IIT-JEE 2012 Paper 2 Offline
MCQ (Single Correct Answer)
+3
-1

Bleaching powder and bleach solution are produced on a large scale and used in several household products. The effectiveness of bleach solution is often measured by iodometry.

Bleaching powder contains a salt of an oxoacid as one of its components. The anhydride of that oxoacid is

A
Cl2O
B
Cl2O7
C
ClO2
D
Cl2O6
4
IIT-JEE 2012 Paper 2 Offline
MCQ (Single Correct Answer)
+3
-1

Bleaching powder and bleach solution are produced on a large scale and used in several household products. The effectiveness of bleach solution is often measured by iodometry.

25 mL of household bleach solution was mixed with 30 mL of 0.50 M KI and 10 mL of 4 N acetic acid. In the titration of the liberated iodine, 48 mL of 0.25 N Na2S2O3 was used to reach the end point. The molarity of the household bleach solution is

A
0.48 M
B
0.96 M
C
0.24 M
D
0.024 M
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