Chemistry

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)

Which of the following compounds produces an optically inactive compound on hydrogenation?

Plerase find the question below:

It is true that:

An organic compound [A], molecular formula C?H?O?, was hydrolyzed with dilute sulphuric acid to give a carboxylic acid [B] and an alcohol [C]. Oxidation of [C] with CrO? – H?SO? produced [B]. Which of the following structures are not possible for [A]?

Tyndall effect is observed when