Formulae of Elements and Compounds

Which of the following is the formulae of stannic phosphate?

The chemical formulae of calcium oxide is _____.

The element ‘X’ has an electronic configuration $2,8,3.$ Element ‘Y’ has an electronic configuration $2,8 7$. The chemical formula of the compound formed when they react is

An element ‘P’ which belongs to $13\mathrm{th}$ group of the periodic table and another element ‘Q’ belongs to $16\mathrm{th}$ group. The formula of the compound formed if they react with each other is:

Write chemical formula of Magnesium Chloride.

The chemical formula of barium carbonate is 

 

Calcium nitrate and potassium sulphate are both used as fertilisers. If too much of them are used, then they can pollute the environment. Which statement about these two substances is true? 

Sodium and potassium are placed in the same group of the modern periodic table. If the molecular formula of sodium sulphate is ${\mathrm{Na}}_2{\mathrm{SO}}_4$, then wirte the molecular formula of potassium sulphate.

The formula of ammonium dichromate is 

${\mathrm{MCl}}_2$ is the chloride of a metal $\mathrm{M}$. The formula of the sulphate and hydroxide of the metal are _____ and _____ respectively. 

Chlorine reacts with sodium to form the compound $\mathrm{NaCl}$. Chlorine also reacts with phosphorus to form the compound ${\mathrm{PCl}}_3$. What will be the chemical formula of the compound formed between sodium and phosphorus?

Cotyledons are also called-

If formula of a compound is ${\mathrm{M}\mathrm{H}\mathrm{S}\mathrm{O}}_4$ then what is the formula of sulphide of $\mathrm{M}$?