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
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
A.
0.0355g
Ideal gas equation is
pV= nRT
When V and T are same,
p ∝ n
Thus, when number of moles, ie, n is least, it will exert least pressure.
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