Last seen: Mar 10, 2022
In the electrolysis of molten NaCl, Cl2 is obtained at the anode as a by product. NaCl(melt) → Na+(melt) + Cl-(melt) At cathode: Na+(melt) + e- → ...
figure.png The above figure is a plot of Gibbs energy (ΔG⊖)vs. T for formation of some oxides. It can be observed from the above graph that a metal ...
figure.png Reduction of ZnO to Zn is usually carried out at 1673 K. From the above figure, it can be observed that above 1073 K, the Gibbs free ener...
The value of ΔfG⊖ for the formation of Cr2O3 from Cr (-540 kJmol-1) is higher than that of Al2O3 from Al (-827 kJmol-1). Therefore, Al can reduce C...
The standard Gibbs free energy of formation of ZnO from Zn is lower than that of CO2 from CO. Therefore, CO cannot reduce ZnO to Zn. Hence, Zn is not ...
In case of low grade copper ores, leaching is carried out using acid or bacteria in the presence of air. In this process, copper goes into the solutio...
During the roasting of pyrite ore, a mixture of FeO and Cu2O is obtained. 2CuFeS2 + O2 + heat → Cu2S + 2FeS + S2 2Cu2S + 3O2 + heat → 2Cu2S + 2SO2...
Correct answer: (c) Hg(OCOCH3)2, H2O/NaBH4.NaOH Explanation: Oxymercuration - demercuration reaction addition of H2O molecule is according to Mark...
Correct answer: (d) Explanation: figure.png
Correct answer: (4) Both Statement-I and Statement-II are true. Explanation: figure.png Here = 0 Since = 0 (equilibrium) Both statem...
Correct answer: (4) T Explanation: T = When bob is immersed in liquid mgeff = mg – Buoyant force mgeff = mg – vσg (σ = density of liquid) ...
Correct answer: (3) Explanation: Δx.Δp ≥ Δx = v = =
Correct answer: (2) OR and NOT Gate Explanation: VA = 5V ⇒ A = 1 VA = 0V ⇒ A = 0 VB = 5V ⇒ B = 1 VB = 0V ⇒ B = 0 If A = B = 0, there is...
Correct answer: (2) [FTV-1] Explanation: [M] = K[F]a [T]b [V]c [M1] = [M1 L1 T-2]a [T1]b [L1 T-1]c a = 1, b = 1, c = -1 ∴ [M] = [FVT-1]
Correct answer: (c) A is true but R is false
Correct answer: (c) B, C and D Explanation: Pumps in active transport are proteins that bind molecules to pass them through the membrane.
Correct answer: (c) the root dies first
Correct answer: (d) all of these Explanation: Diffusion rate is affected by the gradient of concentration, permeability of the membrane separatin...
Correct answer: (a) Henry Dixon
Correct answer: (d) transpiration