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1
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
2
IIT-JEE 2012 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-1

Which ordering of compounds is according to the decreasing order of the oxidation state of nitrogen?

A
HNO3, NO, NH4Cl, N2
B
HNO3, NO, N2, NH4Cl
C
HNO3, NH4Cl, NO, N2
D
NO, HNO3, NH4Cl, N2
3
IIT-JEE 2009 Paper 2 Offline
MCQ (Single Correct Answer)
+3
-0

Match each of the reactions given in Column I with the corresponding product(s) given in Column II:

Column I Column II
(A) $$\mathrm{Cu+dil.~HNO_3}$$ (P) $$\mathrm{NO}$$
(B) $$\mathrm{Cu+conc.~HNO_3}$$ (Q) $$\mathrm{NO_2}$$
(C) $$\mathrm{Zn+dil.~HNO_3}$$ (R) $$\mathrm{N_2O}$$
(D) $$\mathrm{Zn+conc.~HNO_3}$$ (S) $$\mathrm{Cu(NO_3)_2}$$
(T) $$\mathrm{Zn(NO_3)_2}$$

A
(A)$$\to$$(P), (S); (B)$$\to$$(R), (S); (C)$$\to$$(R), (T); (D)$$\to$$(R), (T)
B
(A)$$\to$$(T), (S); (B)$$\to$$(P), (S); (C)$$\to$$(R), (T); (D)$$\to$$(S), (T)
C
(A)$$\to$$(P), (S); (B)$$\to$$(Q), (S); (C)$$\to$$(R), (T); (D)$$\to$$(Q), (T)
D
(A)$$\to$$(R), (S); (B)$$\to$$(Q), (S); (C)$$\to$$(R), (T); (D)$$\to$$(S), (T)
4
IIT-JEE 2009 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-1

The reaction of P$$_4$$ with X leads selectively to P$$_4$$O$$_6$$. The X is

A
Dry O$$_2$$.
B
A mixture of O$$_2$$ and N$$_2$$.
C
Moist O$$_2$$.
D
O$$_2$$ in the presence of aqueous NaOH.
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