Among the elements Ca, Mg, P and Cl, the order of increasing atomic radii is
Mg< Ca < Cl < P
Cl < P < Mg < Ca
P < Cl < Ca < Mg
P < Cl < Ca < Mg
The reaction,
2A (g) + B (g) ⇌ 3C (g) + D (g)
is begun with the concentrations of A and B both at an initial value of 1.00 M. When equilibrium is reached, the concentration of D is measured and found to be 0.25 M. The value for the equilibrium constant for this reaction is given by the expression
[(0.75)3 (0.25)] / [(1.00)2 (1.00)]
[(0.75)3 (0.25) ] / [(0.50)2(0.75)]
[(0.75)3(0.25)] / [(0.50)2(0.75)]
[(0.75)3(0.25)] / [(0.50)2(0.75)]
The pressure exerted by 6.0 g of methane gas in a 0.03 m3 vessel at 129o C is (Atomic masses C = 12.01, H = 1.01 and R = 8.314 JK-1 mol-1)
215216 Pa
13409 Pa
41648 Pa
41648 Pa
Among the following which one has the highest cation to anion size ratio?
CsI
CsF
LiF
LiF
Three moles of an ideal gas expanded spontaneously into the vacuum. The work done will be
infinte
3 J
9 J
9 J
Match List I (equation) with List II (types of the process) and select the correct option.
List I (Equations)
|
List II (Types of process)
|
||
A |
KP > Q |
1 |
Non-spontaneous |
B |
ΔGo < RT In Q |
2 |
Equilibrium |
C |
KP = Q |
3 |
Spontaneous and endothermic |
D |
T> ΔH/ ΔS |
4 |
Spontaneous |
A
|
B
|
C
|
D
|
1
|
2
|
3
|
4
|
A | B | C | D |
3 | 4 | 2 | 1 |
A | B | C | D |
4 | 1 | 2 | 3 |
A | B | C | D |
4 | 1 | 2 | 3 |
A 0.66 kg ball is moving with a speed of 100 m/s. The associated wavelength will be
(h = 6.6 x 10-34 Js)
6.6 x 10-32 m
6.6 x 10-34 m
1 x 10-35 m
1 x 10-35 m
In which of the following molecules the central atom does not have sp3 hybridisation?
CH4
SF4
BF4-
BF4-
Some statement about heavy water are given below
A) Heavy water is used as a moderator in nuclear reactors.
B) Heavy water is more associated than ordinary water.
C) Heavy water is more effective solvent than ordinary
A and B
A, B and C
B and C
B and C
A.
A and B
Heavy water is used as a moderator in nuclear reactors. Its boiling point is higher as compared to the ordinary water. Thus, it is more associated as compared to ordinary water. The dielectric constant is however higher for H2O, thus, H2O is a more effective solvent than heavy water (D2O).