1
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
In which of the following arrangements the order is NOT according to the property indicated against it?
A
Li < Na < K < Rb Increasing metallic radius
B
I < Br < F < Cl Increasing electron gain enthalpy (with negative sign)
C
B < C < N < O Increasing first ionization enthalpy
D
Al3+ < Mg2+ < Na+ < F- Increasing ionic size
2
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Lattice energy of an ionic compounds depends upon
A
Charge on the ion only
B
Size of the ion only
C
Packing of ions only
D
Charge on the ion and size of the ion
3
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Which one of the following statements is NOT true about the effect of an increase in temperature on the distribution of molecular speeds in a gas?
A
The most probable speed increases
B
The fraction of the molecules with the most probable speed increases
C
The distribution becomes broader
D
The area under the distribution curve remains the same as under the lower temperature
4
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Consider the reaction: N2 + 3H2 $$\to$$ 2NH3 carried out at constant temperature and pressure. If $$\Delta H$$ and $$\Delta U$$ are the enthalpy and internal energy changes for the reaction, which of the following expressions is true?
A
$$\Delta H$$ > $$\Delta U$$
B
$$\Delta H$$ < $$\Delta U$$
C
$$\Delta H$$ = $$\Delta U$$
D
$$\Delta H$$ = 0
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