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
Ca <Mg <P < Cl
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 (0.25)]
[(0.75)3 (0.25)] [(0.75)2 (0.25)]
The pressure exerted by 6.0g of methane gas in a 0.03 m3 vessel at 129°C is (Atomic masses: C = 12.01, H = 1.01 and R= 8.314JK-1 mol-1)
215216 Pa
13409 Pa
41648 Pa
31684 Pa
Match List I (Equations) with List II (Types of process) and select the correct option.
List I (Equation) |
List II (Types of process) |
||
A. | 1. | Non-spontaneous | |
B. | 2. | Equilibrium | |
C. | 3. | Spontaneous and endothermic | |
D. | T > | 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 |
2 | 1 | 1 | 3 |
Some of the properties of the two species, are described below. Which one of them is correct?
Dissimilar in hybridisation for the central atom with different structures
Isostructural with same hybridisation for the central atom
Isostructural with different hybridisation for the central atom
Similar in hybridisation for the central atom with different structures
What is the value of electron gain enthalpy of Na if IE1 of Na = 5.1 eV?
-5.1 eV
-10.2 eV
+2.55 eV
+10.2eV