Chemistry NCERT Exemplar Solutions Class 12th Chapter Four

What are the factors favourable for the formation of the Ionic Bonds?

The mole fraction of glucose (C?H?O?) in an aqueous binary solution is 0.1. The mass percentage of water in it, to the nearest integer, is

An element with molar mass 2.7 * 10?² kg mol?¹ forms a cubic unit cell with edge length 405pm. If its density is 2.7 * 10³ kg m?³, the radius of the element is approximately * 10?¹² m (to the nearest integer).

The total number of monohalogenated organic products in the following (including stereoisomers) reaction is
A (Simplest optically active alkene) --(i) H?/Ni/Δ, (ii) X?/Δ--> Products
(Alkyl Halides)

The photoelectric current from Na (work function, w? = 2.3eV) is stopped by the output voltage of the cell
Pt(s)/H?(g, 1 bar) | HCl (aq., pH = 1)|AgCl(s)|Ag(s).
The pH of aq. HCl required to stop the photoelectric current from K(w? = 2.25 eV), all other conditions remaining the same, is * 10?² (to the nearest integer).
Given,
2.303(RT/F) = 0.06 V; E°(AgCl|Ag|Cl?) = 0.22 V

The volume strength of 8.9M H?O? solution calculated at 273 K and 1 atm is (R = 0.0821 Latm K?¹ mol?¹) (rounded off to the nearest integer)
(p-block)

If the radius of the 3^rd Bohr's orbit of hydrogen atom r₃ and the radius of 4^th Bohr's orbit is r₄. Then

Arrange the following in the decreasing order of their covalent character:

(A) LiCl
(B) NaCl
(C) KCl
(D) CsCl

Arrange the following in the decreasing order of their covalent character:

           (A) LiCl
            (B) NaCl

          (C) KCl

           (D) CsCl

Choose the most appropriate answer from the options given below:

At $30°C,$ the half life for the decomposition of AB₂ is 200s and is independent of the initial concentration of AB₂. The time required for 80% of the AB₂ to decompose is