What is the formula of water ?

Important Questions on Atoms and Molecules

EASY

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

Write the chemical name of $\mathrm{Mg}({\mathrm{HCO}}_3{)}_2$.

EASY

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

Atomic number of fluorine is $9$, it has valence electrons:

EASY

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

Define valency.

EASY

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

Write the chemical name of ${\mathrm{KClO}}_3$.

EASY

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

Write the chemical name of ${\mathrm{Na}}_2{\mathrm{PbO}}_2$.

EASY

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

The formula of aluminium sulphate is ${\mathrm{Al}}_2({\mathrm{SO}}_4{)}_3$. Write the formula of aluminium chloride and aluminium nitride

EASY

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

The formula of iron (III) chloride is:

EASY

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

${\mathrm{CaCl}}_2$ is :

EASY

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

Write the chemical name of $\mathrm{KClO}$.

HARD

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

Define valency by taking examples of silicon and oxygen. 

MEDIUM

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

The valency of phosphate in ${\mathrm{Na}}_{3 }{\mathrm{PO}}_4$ is

EASY

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

The number of hydrogen atoms, which combine directly or indirectly with one atom of an element, so as to form a chemical compound is:

EASY

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

Which amongst the following has +2 valency?

EASY

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

The formula of calcium hydrogen carbonate is:

HARD

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

The formula of a compound formed by ${\mathrm{Ca}}^{2+}$ and ${\mathrm{O}}^{2-}$ is:

EASY

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

Atomic number of potassium is $19$, it has valence electrons:

EASY

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

Formula of a compound formed by ${\mathrm{Fe}}^{3+}$ and ${{\mathrm{SO}}_4}^{2-}$ is:

EASY

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

${\mathrm{Na}}_2{\mathrm{CO}}_3$is:

MEDIUM

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

Formula of a compound formed by M⁺ and X^2- ions, is:

EASY

Science>Chemistry>Atoms and Molecules>Writing Chemical Formulae

The chemical name of ${\mathrm{Fe}}_2({\mathrm{SO}}_4{)}_3$ is: