Last seen: Jan 13, 2022
(1) A > B > C Explanation: Relative lowering in vapour pressure depends on no. of mole of solute greater the no. of mole of solute greater i...
(2) (I)-(B), (II)-(D), (III)-(A), (IV)-(C) Explanation: (i) Ca(OH)2 is used in white wash. (ii) Plaster of paris is used in making of molds for...
(1) The electrolysis of warm Ba(OH)2 solution using Ni elecrrodes. Explanation: Dihydrogen of high degree of purity (>99.95%) is obtained by th...
(1) Lanthanoid metals Explanation: Misch metal consists of Lanthanide metal (≈95%) and iron (≈5%) and traces of S, C, Ca and Al.
(1) zinc Explanation: Zn, Cd & Hg are purified by fractional distillation process.
If molar mass of compound is M 1.6/M = 1.88/188 = 0.01 so m = 160 gram/mole Now %of bromine = 80/160 × 100 % = 50%
If volume of 3 cm balloon is = V then volume of 12 cm radius balloon = 64V So pressure will become 1/64 times = 1/64 × 48 × 10–3 bar = 750 × 10–...
= {2 × t × 60 × 60 / 96500} × 0.60 × 122 × (1/6) = 10 So t = 10.98 hours
Perchloric acid => HClO4 Total Cl = O bonds = 3 2s.png
0.05 m aqueous CaCl2 solution = 0.15 molal solution of non electrolyte. Since the elevation in boiling point is double so the molality of given sol...
(2) brass is an alloy of copper and nickel. Explanation: Alloy Composition 1. Bronze - Cu (75 – 90%) + Sn (10, 25%) 2. Br...
(4) it can be used as an inert diluent for reactive chemicals. Explanation: (1) liquid dinitrogen is used in cryosurgery. (2) N2 is diamagnetic...
(4) [MnBr4]2- (Td) Explanation: (1) Ni(CO)4 - 3d10 - 0 (2) [Ni(CN)4]2- 3d8 0 (3) [NiCl4]2- 3d8 0 (4) [MnBr4]2- 3d5 0
(2) Both (A) and (R) are correct and (R) is the correct explanation of (A). Explanation: High density polythene: It is formed when addition polyme...
(4) Eu Explanation: Cu(z = 63) = 4F76s2 Dy(z = 66) = 4F106s2 Tb(z = 65) = 4F96s2 Ce(58) = 4F15d16s2 Dy, Tb and Ce show +4 oxidation state ...
(3) above which the formation of micelles takes place. Explanation: (i) Micelles formation take place only above a particular temperature called a...
(3) Kc = Kp(RT)1/2 Explanation: Kc = Kp(RT)Δng = Kc = Kp(RT)1/2 as Δng = 1/2
(1) d > b > a > c Explanation: Rate = K[Conc]order logRate = log K + order log[conc] so slope of graph is order of reaction. greate...
(3) 21, 25, 42, 72 Explanation: A transition element is defined as the one which has incompletely filled d orbitals in its ground state or in any ...
(3) 4-methylpent-2-ene Explanation: Can show G.I. because both doubly bonded carbon have two different groups. 2s.png