Maharashtra Board Solutions for Chapter: Composition of Matter, Exercise 7: Exercises

Write scientific reason: Hydrogen is combustible, oxygen helps combustion, but water helps to extinguish fire.

Write scientific reason: Constituent substances of a colloid cannot be separated by ordinary filtration.

Write scientific reason: Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.

Write scientific reason: A solid matter has the properties of definite shape and volume.

Deduce the molecular formulae of the compound obtained from the following pairs of elements by the cross multiplication method. $\mathrm{C}$ (Valency $4$) & $\mathrm{Cl}$ (Valency $1$)

Deduce the molecular formulae of the compound obtained from the following pairs of elements by the cross multiplication method. $\mathrm{N}$ (Valency $3$) & $\mathrm{H}$ (Valency $1$)

Deduce the molecular formulae of the compound obtained from the following pairs of elements by the cross multiplication method. C (Valency 4) & O (Valency 2)

Deduce the molecular formulae of the compound obtained from the following pairs of elements by the cross multiplication method. Ca (Valency 2) & O (Valency 2).