Practice Questions

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

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

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

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

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

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

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

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________.

Q60.Number of amine compounds from the following giving solids which are soluble in NaOH upon reaction with Hinsberg's reagent is _______

Q60. M2+ + H2 S →A (Black precipitate) + by product Consider the following test for a group-IV cation. A + aqua regia →B + NOCl + S + H2O The B + KNO2 + CH3COOH →C + by product spin-only magnetic moment value of the metal complex C is ______ BM (Nearest integer)

Q60.From the vitamins 𝐴, 𝐵1, 𝐵6, 𝐵12, 𝐶, 𝐷, 𝐸 and 𝐾, the number vitamins that can be stored in our body is ______.

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.The number of white coloured salts among the following is ....... A SrSO4 B MgNH4PO4 C BaCrO4 D Mn ( OH ) E PbSO4 F PbCrO4 2 G AgBr H PbI2 I CaC2O4 J Fe ( OH ) 2CH3COO

Q60.The compound formed by the reaction of ethanal with semicarbazide contains _______ number of nitrogen atoms. ¯

Q60. In a borax bead test under hot condition, a metal salt (one from the given) is heated at point B of the flame, JEE Main 2024 (05 Apr Shift 1) JEE Main Previous Year Paper resulted in green colour salt bead. The spin-only magnetic moment value of the salt is _______ BM (Nearest integer) [Given atomic number of Cu = 29, Ni = 28, Mn = 25, Fe = 26]