For one mole of an ideal gas, increasing the temperature from 10°C to 20°C
increases the average kinetic energy by two times
increases the rms velocity by √2 times
increases the rms velocityby two times
increases both the average kinetic energy and rms velocity, but not significantly
Carbon can reduce ferric oxide to iron at a temperature above 983 K because
carbon monoxide formed is thermodynamically less stable than ferric oxide
carbon has a higher affinity towards oxidation than iron
free energy change for the formation of carbon dioxide is less negative than that for ferric oxide
iron has a higher affinity towards oxygen than carbon
50 cm3 of 0.2 NHCl is titrated against 0.1 N NaOH solution. The titration is discontinued after adding 50 cm3 of NaOH.The remaining titration is completed by adding 0.5 N KOH. The volume of KOH required for completing the titration is
12 cm3
10 cm3
25 cm3
10.5 cm3
B.
10 cm3
When 0.1 N NaOH is used
N1V1 = N2V2
(for HCl) (for NaOH)
0.2N × V1 = 50 × 0.1N
V1 =
When 0.5 N KOH is used,
N1V1 = N3V3
(For remaining HCl) (For KOH)
0.2N × 25 = 0.5N × V3
V3 =
In which one of the following, does the given amount of chlorine exert the least pressure in a vessel of capacity 1 dm3 at 273 K?
0.0355g
0.071g
6.023 × 1021 molecules
0.02 mol
Based on the first law of thermodynamics, which one of the following is correct?
For an isochoric process = ΔE = - q
For an adiabatic process = ΔE =-w
For an isothermal process = q = + w
For a cyclic process q = - w
1 g of silver gets distributed between 10 cm3 of molten zinc and 100 cm3 of molten lead at 800°C. The percentage of silver in the zinc layer is approximately
89
91
97
94
0.023 g of sodium metal is reacted with 100cm3 of water. The pH of the result solution is
10
11
9
12
A buffer solution contains 0.1 mole of sodium acetate in 1000 cm3 of 0.1 M acetic acid. To the above buffer solution, 0.1 mole of sodium acetate is further added and dissolved. The pH of the resulting buffer is equal to
pKa - log2
pKa
pKa +2
pKa + log 2
The empirical formula of a non-electrolyte is CH2O. A solution containing 6g of the compound exerts the same osmotic pressure as that of 0.05 M glucose solution at the same temperature. The molecular formula of
C2H4O2
C3H6O3
C5H10O5
C4H8O4
1 dm3 solution containing 10-5 moles each of Cl- ions and CrO ions is treated with 10-4 moles of silver nitrate. Which one of the following observations is made?
[KspAg2CrO4 = 4 × 10-12] and [KspAgCl = 1 × 10-10]
Precipitation does not occur
Silver chromate gets precipitated first
Silver chloride gets precipitated first
Both silver chromate and silver chloride start precipitating simultaneously