Multiple Choice QuestionsA gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is :
Z > 1 and repulsive forces are dominant
Z < 1 and attractive forces are dominant
Z < 1 and repulsive forces are dominant
Z > 1 and attractive forces are dominant
4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is:
6p > 5f > 5p > 4d
6p > 5f > 4d > 5p
5f > 6p > 4d > 5p
5f > 6p > 5p > 4d
Which will make basic buffer?
100mL of 0.1 M CH3COOH + 100mL of 0.1M NaOh
100 mL of 0.1 M HCl + 200 mL of 0.1 M NH4OH
100 mL of 0.1 M HCl + 100 mL of 0.1 M NaOH
50 mL of 0.1 M NaOH + 25 mL of 0.1 M CH3COOH
Which of the following diatomic molecular species has only π bonds according to Molecular Orbital Theory?
N2
C2
Be2
O2
Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is:(Given that 1 L bar = 100 J)
5 kJ
25 J
30 J
-30 J
Which of the following series of transitions in the spectrum of hydrogen atom fall in visible region?
Balmer series
Paschen series
Brackett series
Lyman series
Conjugate base for BrÖnsted acids H2O and HF are :
H3O+ and F-, respectively
OH- and F-, respectively
H3O+ and H2F+, respectively
OH- and H2F+, respectively
In which case change in entropy is negative?
Expansion of a gas at constant temperature
Sublimation of solid to gas
2H(g) → H2(g)
Evaporation of water
The manganate and permanganate ions are tetrahedral, due to :
There is no π-bonding
The π- bonding involves overlap of p-orbitals of oxygen with p-orbitals of manganese.
The π-bonding involves overlap of d-orbitals of oxygen with d-orbitals of manganese
The π-bonding involves overlap of p-orbitals of oxygen with d-orbitals of manganese
pH of a saturated solution of Ca(OH)2 is 9. The solubility product(Ksp) of Ca(OH)2 is:
0.25 × 10-10
0.5 × 10-15
0.125 × 10-15
0.5 × 10-10
