Chemistry lectures are based on CBSE XI and XII syllabus. It also includes problems discussion related to NEET and JEE preparation.
Q.46 Which of the following species contains equal number of σ – and π bonds?(1) HCO3-(2) XeO4(3) (CN)2(4) CH2(CN)2Q.47 The species Ar, K+ and Ca2+ contains the same number of…
Q.46 What is the maximum number of orbitals that can be identified with the following quantum numbers n = 3, l = l, ml = 0(1) 1 (2) 2…
Q.46 The value of Planck's constant is 6.63 × 10–34 Js. The speed of light is 3 × 1017 nm s–1. Which value is closest to the wavelength in nanometer…
1. CH3CHO and C6H5CH2CHO can be distinguished chemically by(1) Fehling solution test (2) Benedict test(3) Iodoform test (4) Tollen’s reagent test 2. pA and pB are the…
1. Vapour pressure of chloroform (CHCl3) and dichloromethane (CH2Cl2) at 25°C are 200 mm Hg and 41.5 mm Hg respectively. Vapour pressure of the solution obtained by mixing 25.5 g…
51. The total number of atomic orbitals in fourth energy level of an atom is(1) 4 (2) 8(3) 16 (4) 3252.(1) 0.150 V (2) 0.500 V(3)…