1
AIEEE 2010
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Percentages of free space in cubic close packed structure and in body centred packed structure are respectively :
A
30% and 26%
B
26% and 32%
C
32% and 48%
D
48% and 26%
2
AIEEE 2010
MCQ (Single Correct Answer)
+4
-1
If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous solution, the change in freezing point of water (∆Tf), when 0.01 mol of sodium sulphate is dissolved in 1 kg of water, is (Kf = 1.86 K kg mol–1)
A
0.0372 K
B
0.0558 K
C
0.0744 K
D
0.0186 K
3
AIEEE 2010
MCQ (Single Correct Answer)
+4
-1
On mixing, heptane and octane form an ideal solution. At 373 K, the vapour pressures of the two liquid components (heptane and octane) are 105 kPa and 45 kPa respectively. Vapour pressure of the solution obtained by mixing 25.0g of heptane and 35 g of octane will be (molar mass of heptane = 100 g mol–1 and of octane = 114 g mol–1)
A
72.0 kPa
B
36.1 kPa
C
96.2 kPa
D
144.5 kPa
4
AIEEE 2010
MCQ (Single Correct Answer)
+4
-1
The correct order of $$E_{{M^{2 + }}/M}^o$$ values with negative sign for the four successive elements Cr, Mn, Fe and Co is :
A
Mn > Cr > Fe > Co
B
Cr > Fe > Mn > Co
C
Fe > Mn > Cr > Co
D
Cr > Mn > Fe > Co
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