Number of electrons
Oxidation number
Both A & B
Neither A nor B
✅ The correct answer is option A.
Statiometery MCQs
302. Raoult’s law is not applicable to the
Solutes which dissociate or associate in the particular solution
Concentrated solutions
Both B & C
Solutions containing non-volatile solute
✅ The correct answer is option C.
303. 1 gm mole of methane (CH₄) contains
6.02 x 1023 atoms of hydrogen
4 gm atoms of hydrogen
3.01 x 1023 molecules of methane
3 gms of carbon
✅ The correct answer is option B.
304. 1 centipoise is equivalent to
1 gm/cm.second
1 centistoke
2.42 lb/ft.hr
2.42 lb/ft.second
✅ The correct answer is option C.
305. A solution with reasonably permanent pH is called a/an __________ solution.
Ideal
Non-ideal
Buffer
Colloidal
✅ The correct answer is option C.
306. If 1 Nm³ of O₂ contains ‘N’ number of molecules, then number of molecules in 2Nm³ of SO₂ will be
N
N/2
2N
4N
✅ The correct answer is option C.
307. What is the total pressure exerted by a mixture of 0.45 kg mole of benzene, 0.44 kg mole of toluene and 0.23 kg mole of o-xylene at 100°C, if their vapor pressures at 100°C are 1340, 560 and 210 mmHg respectively?
756.2
780.5
801.5
880.5
✅ The correct answer is option C.
308. In case of a solution (not of a solid in a liquid), whose total volume is less than the sum of the volumes of its components in their pure states, solubility is
Independent of temperature
Increases with rise in pressure
Increased with decrease in pressure
Unchanged with pressure changes
✅ The correct answer is option B.
309. What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20)?
AB₃
A₂B₃
A₂B
AB₂
✅ The correct answer is option A.
310. At standard conditions, N₂ + 2O₂ ⇋ 2NO₂; ΔG° = 100 kJ/mole NO + ½O₂ ⇋ 2NO₂; ΔG° = -35 kJ/mole The standard free energy of formation of NO in kJ/mole is
15
30
85
170
✅ The correct answer is option C.