Subject Experts Solutions for Chapter: Atomic Structure and Transformation of Matter, Exercise 2: PRACTICE QUESTIONS (COMPETITION WING)

In a chemical laboratory, a student took two test tubes A and B. Lead nitrate solution is taken in the test tube "A" and sulphuric acid is taken in the test tube "B". Sodium chloride solution and lithium hydroxide solutions are added to the test tubes "A" and "B" respectively. Predict the products and identify the types of reactions.

In an atom, the L and M shells have the same number of electrons. The N shell has one electron less than K shell. Explain the formation of compound by this element and oxygen atom.

Explain the formation of the compound formed by two elements with $\mathrm{Z}=20 \mathrm{and} \mathrm{Z}=17.$

An atom of an element has the electrons distributed in four shells. If the electrons present in I and IV shells is in $1:1$ ratio, and the ratio of electrons in II and III shell is also $1:1$. Predict its valency and justify. Write the formulae of (a) nitride (b) silicate (c) chloride.

A negative ion of an atom of element X has $18$ electrons and $16$ protons. Calculate the number of electrons and protons in its corresponding atom. Also calculate the number of neutrons, if the mass number is $2$ units than double the number of protons.

If the formula of metal sulphite of a metal M is ${\mathrm{MSO}}_3$, give the formula of its phosphate.

If the formula of metal sulphite of a metal M is ${\mathrm{MSO}}_3$, give the formula of its hydrogen phosphate.

If the formula of metal sulphite of a metal M is ${\mathrm{MSO}}_3$, give the formula of its chloride.