Andhra Pradesh Board Solutions for Chapter: Model Question Paper, Exercise 1: CHEMISTRY 1 Year Text Questions - Corrections - Additions

How many neutrons and electrons are present in the nuclei of ${}_6\mathrm{C}^{13}, {}_8\mathrm{O}^{16}, {}_{12}\mathrm{Mg}^{24}, {}_{26}\mathrm{Fe}^{56}, {}_{38}\mathrm{Sr}^{88}.$

Give reason: why ${\mathrm{H}}_2\mathrm{O}$ boiling point is more than ${\mathrm{H}}_2\mathrm{S}$?

Give reason: why ${\mathrm{H}}_2\mathrm{O}$ B.P is more than $\mathrm{HF}$?

Give the valves of gas constant $\text{'}\mathrm{R}\text{'}$ in different units.

Calculate the normality of ${\mathrm{H}}_2{\mathrm{SO}}_4$ solution. If $50 \mathrm{ml}$ of it completely neutralised $250 \mathrm{ml}$ of $0.2 \mathrm{N}$ sodium hydroxide $\left(\mathrm{NaOH}\right)$ solution.

What is the wavelength of an electron moving with a velocity of $2.0\times {10}^7 {\mathrm{ms}}^{-1}$?

The static electric charge on the oil drop is $-3.2044\times {10}^{-9} \mathrm{C}.$ How many electrons are present on it?

A line in lyman series of hydrogen atom has a wavelength of $1.03\times {10}^{-7} \mathrm{m}.$ What is the initial energy level of the electron?