Last seen: Dec 29, 2021
Correct answer: (d) Aestivation
Correct answer: (a) Hibernation
Correct answer: (b) Migrate
Correct answer: (a) Al4C3 + H2O → CH ≡ CH Explanation: Al4C3 + 12H2O → 4Al(OH)3 + 3CH4
Correct answer: (d) Explanation: Gypsum is CaSO4.2H2O, where as plaster of paris is CaSO4 No. of water = (2 - ) → or molecules.
Correct answer: (c) Borax — (Na2B4O7.7H2O) Explanation: Borax is Na2B4O7.7H2O.
Correct answer: (d) Explanation: Silver nitrate test is carried out to detect the type of halide ion in a given solution. The solution is first ac...
Correct answer: (b) CuCl2 Explanation: CuCl2 gives blue-green coloured aqueous solution.
Correct answer: (b) S1 is correct but S2 is incorrect. Explanation: Methyl orange indicator is used in the strong acid weak base titration. Phenol...
Correct answer: (c) Bakelite Explanation: Bakelite is a polymer made up of the monomers phenol and formaldehyde. This phenol-formaldehyde resin is...
Correct answer: (b) S1 is correct but S2 is incorrect. Explanation: In Frenkel Defect the smaller ion (usually cation) is dislocated from its norm...
Correct answer: (c) S1 is incorrect but S2 is correct. Explanation: v = 2.18 x As positive charge on the nucleus (Z) decreases, velocity will a...
Correct answer: (b) S1 is correct but S2 is incorrect. Explanation: ∆H (enthalpy change) and the ∆S (entropy change) values for any chemical react...
Correct answer: (d) Explanation: Reaction of phenol with Br2 and H2O figure.png
Correct answer: (a) 7 Explanation: Electronic configuration of Gd2+ is [Xe]4f7
Correct answer: (b) Synthetic resin method Explanation: Pure de-mineralised (de-ionized) water free from all soluble mineral salts is obtained by ...
Correct answer: (d) 60 kg/s Explanation: Mass of rocket (m) = 1000 kg Velocity v = 500 m/s Acceleration a = 20 m/s2 m(g + a) = v = = ...
Correct answer: (c) Explanation: In YDSE Y = For 1st maxima m = 1 For red light Y1 = 1 x λred = For red light Y2 = 1 x λviolet = ...
Correct answer:(a) + Explanation: figure.png IO(ring) = Mr2 + M = Mr2 + = Io(rod) = + m = 3mr2 + = Io(Badminton) = Io(ring...
The three important characteristics of a population are: (i) Birth and death rate (ii) Age structure (iii) Sex ratio (i) The birth rate (na...