Practice Questions

Q59.A compound 𝑥 with molar mass 108𝑔 mol−1 undergoes acetylation to give product with molar mass 192𝑔 mol−1. The number of amino groups in the compound 𝑥 is ________.

Q59.Consider the following data for the given reaction 2 HI(g) →H2( g) + I2( g) HI(molL−1) 0. 005 0. 01 0. 02 Rate (molL−1 s−1) 7. 5 × 10−4 3. 0 × 10−3 1. 2 × 10−2 The order of the reaction is __________.

Q59.Total number of species from the following with central atom utilising sp2 hybrid orbitals for bonding is _____. NH3, SO2, SiO2, BeCl2, C2H2, C2H4, BCl3, HCHO, C6H6, BF3, C2H4Cl2

Q59.A transition metal ' M ' among Sc, Ti, V, Cr, Mn and Fe has the highest second ionisation enthalpy. The spin- only magnetic moment value of M+ ion is _______. BM (Near integer) (Given atomic number Sc : 21, Ti : 22, V : 23, Cr : 24, Mn : 25, Fe : 26)

Q59.If 279 g of aniline is reacted with one equivalent of benzenediazonium chloride, the maximum amount of aniline yellow formed will be _______ g. (nearest integer) (consider complete conversion).

Q59.Number of ambidentate ligands among the following is ______ NO−2 , SCN−, C2O2−4 , NH3, CN−, SO2−4 , H2O.

Q59.Two moles of benzaldehyde and one mole of acetone under alkaline conditions using aqueous NaOH after heating gives x as the major product. The number of π bonds in the product x is _______

Q59.The product (C) in the following sequence of reactions has ______ π bonds.

Q59.Time required for completion of 99 . 9% of first order reaction is ________ times of half life (t1 / 2 ) of the reaction

Q59.The major products from the following reaction sequence are product A and product B. The total sum of π electrons in product A and product B are _______ (nearest integer) Q60. 9.3 g of pure aniline upon diazotisation followed by coupling with phenol gives an orange dye. The mass of orange dye produced (assume 100\% yield/conversion) is _______ g. (nearest integer)

Q59.The rate of first order reaction is 0. 04 mol L−1 s−1 at 10 minutes and 0. 03 mol L−1 s−1 at 20 minutes after initiation. Half life of the reaction is ______ minutes. (Given log 2 = 0. 3010, log 3 = 0. 4771) Round off your answer to the nearest integer.

Q59.The number of the correct reaction(s) among the following is ______

Q59.The half-life of radioisotopic bromine - 82 is 36 hours. The fraction which remains after one day is _________ ×10−2 . (Given antilog 0. 2006 = 1. 587) Round off to the nearest integer

Q59.From 6.55 g of aniline, the maximum amount of acetanilide that can be prepared will be ______ ×10−1 g.

Q59.For a reaction taking place in three steps at same temperature, overall rate constant K = K1K2 . If Ea1, Ea2 and K3 Ea3 are 40, 50 and 60 kJ / mol respectively, the overall Ea is _________ kJ / mol .

Q59.Consider the given chemical reaction sequence : Total sum of oxygen atoms in Product A and Product B are _______

Q59.Among the following oxide of p - block elements, Cl2O7, CO, PbO2, N2O, NO, Al2O3, SiO2, N2O5, SnO2

Q59.The product of the following reaction is 𝑃. JEE Main 2024 (31 Jan Shift 1) JEE Main Previous Year Paper The number of hydroxyl groups present in the product 𝑃 is________.

Q59.Number of compounds which give reaction with Hinsberg's reagent is _________. JEE Main 2024 (01 Feb Shift 2) JEE Main Previous Year Paper

Q59.Number of metal ions characterized by flame test among the following is _________. Sr2 + , Ba2 + , Ca2 + , Cu2 + , Zn2 + , Co2 + , Fe2 +

Q60.Molar mass of the salt from NaBr, NaNO3, KI and CaF2 which does not evolve coloured vapours on heating with concentrated H2SO4 is ____ g mol – 1, (Molar mass in g mol – 1 : Na : 23, N : 14, K : 39, O : 16, Br : 80, I : 127, F : 19, Ca : 40 )

Q60.Oxidation state of Fe(Iron) in complex formed in Brown ring test.

Q60.From the given list, the number of compounds with +4 oxidation state of Sulphur SO3, H2 SO3, SOCl2, SF4, BaSO4, H2 S2O7

Q60.Vanillin compound obtained from vanilla beans, has total sum of oxygen atoms and π electrons is ______

Q60. The ratio of number of oxygen atoms to bromine atoms in the product Q is ______ ×10−1 .