Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)

The number of unit cells in 58.5 g of NaCl is nearly (a) 6 x 10^20 (b) 3 x 10^22 (c) 1.5 x 10^23 (d) 0.5 x 10^24 The number of unit cells in 58.5 g of NaCl is nearly (a) 6 x 10^20 (b) 3 x 10^22 (c) 1.5 x 10^23 (d) 0.5 x [...]

The number of atoms/ molecules contained in one body centred cubic unit cell is (a) 1 (b) 2 (c) 4 (d) 6 The number of atoms/ molecules contained in one body centred cubic unit cell is (a) 1 (b) 2 (c) 4 (d) 6 February 8, 2021 Category: Uncategorised (JEE Advanced Physics by BM Sharma [...]

In the Bragg’s equation for diffraction of X – rays , n represents for (a) Quantum number (b) An integer (c) Avogaro’s numbers (d) moles In the Bragg's equation for diffraction of X -rays n represents for (a) Quantum number (b) An integer (c) Avogaro's numbers (d) moles February 8, 2021 Category: Uncategorised (JEE Advanced [...]

For an ionic crystal of the gerneral formula AX and coordination number 6, the value of ratio will be (a) Greater than 0.73 (b) In between 0.73 and 0.41 (c) In between 0.41 and 0.22 (d) Less than 0.22 For an ionic crystal of the gerneral formula AX and coordination number 6 the value of [...]

In face centred cubic unit cell edge length is (a) 4 / root 3 r (b) 4/root 2 r (c) 2r (d) root 3/2 r In face centred cubic unit cell edge length is (a) 4 / root 3 r (b) 4/root 2 r (c) 2r (d) root 3/2 r February 8, 2021 Category: Uncategorised [...]

Sodium metal crystallizes as a body centred cubic lattice with the cell edge 4.29 phi A. what is the radius of sodium atom (a) 1.857 x 10^-8 cm (b) 2.371 x 10^-7 cm (c) 3.817 x 10^-8 cm (d) 9.312 x 10^-7 cm Lithium metal crystallizes in a body- centered cubic crystal. If the length [...]

Lithium has a bcc structure . Its density is 530 kg/m^3 and its atomic mass is 6.94 g/mol. Calculate the edge length of a unit cell of lithium metal . ( Na = 6.02 x 10^23 /mol ) Lithium has a bcc structure . Its density is 530 kg/m^3 and its atomic mass is 6.94 [...]

Assertion : Nucleophilic substitution reaction on an optically active alkyl halide gives a mixture of enantiomers . Reason : The reaction occours by S N1 mechanism. (a) If both assertion and reason are true and the reason is the correct explanation of the assertion. Reaction of alkyl halides with aromatic compounds in presence of anhydrous [...]

A metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g/cm^3. The molar mass of the metral is A metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g/cm^3. [...]

The ionic radii A^+ and B^- ions are 0.98 x 10^-10 m and 1.81 x 10^-10 m. The coordination number of each ion in AB is (a) 6 (b) 4 (c) 8 (d) 2 The ionic radii A^+ and B^- ions are 0.98 x 10^-10 m and 1.81 x 10^-10 m. The coordination number of [...]