Practice questions
88551 published questions with worked solutions.
- Given below are two statements: Statement (I): A solution of [Ni(H_2O)_6]^ 2+ is green in colour. Statement (II): A solution of...
- In case of isoelectronic species the size of F^-, Ne and Na^+ is affected by:
- Arrange the bonds in order of increasing ionic character in the molecules. LiF, K_2O, N_2, SO_2 and ClF_3.
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A):...
- In acidic medium, K_2Cr_2O_7 shows oxidising action as represented in the half reaction: Cr_2O_7^ 2- + XH^+ + Ye^ → 2A + ZH_2O....
- Given below are two statements: Statement (I): Aminobenzene and aniline are same organic compounds. Statement (II): Aminobenzene...
- Given below are two statements: Statement (I): Potassium hydrogen phthalate is a primary standard for standardisation of sodium...
- Ionic reactions with organic compounds proceed through (A) Homolytic bond cleavage (B) Heterolytic bond cleavage (C) Free radical...
- K_a for CH_3COOH is 1.8 × 10^ -5 and K_b for NH_4OH is 1.8 × 10^ -5 . The pH of ammonium acetate solution will be ______.
- Among the following oxides of p-block elements, number of oxides having amphoteric nature is ________. Cl_2O_7, CO, PbO_2, N_2O,...
- The lowest oxidation number of an atom in a compound A_2B is –2. The number of electrons in its valence shell is _______.
- Number of optical isomers possible for 2- chlorobutane _______.
- Consider the following reaction: 3PbCl_2 + 2(NH_4)_3PO_4 → Pb_3(PO_4)_2 + 6NH_4Cl. If 72 mmol of PbCl_2 is mixed with 50 mmol of...
- The number of white coloured salts, among the following is _______. (a) SrSO_4 (b) Mg(NH_4)PO_4 (c) BaCrO_4 (d) Mn(OH)_2 (e)...
- Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is _______. (a) –COOCH_3...
- The number of molecules/ions having trigonal bipyramidal shape is _______. PF_5, BrF_5, PCl_5, [PtCl_4]^ 2- , BF_3, Fe(CO)_5
- The potential for the given half cell at 298 K is (–) ________ × 10^ -2 V. 2H^+(aq) + 2e^- → H_2(g), [H^+] = 1M, P_ H_2 = 2 atm...
- Let S = z ∈ C : |z − 1| = 1 and ( 2 - 1)(z + z) - i(z - z) = 2 2 . Let z_1, z_2 ∈ S be such that |z_1| = _ z S |z| and |z_2| = _...
- Let x^2 a^2 + y^2 b^2 = 1, a > b be an ellipse, whose eccentricity is 1 2 and the length of the latusrectum is 14 . Then the...
- For 0 < θ < π/2, if the eccentricity of the hyperbola x^2 - y^2 ^2 = 5 is 7 times eccentricity of the ellipse x^2 ^2 + y^2 = 5,...