Chemistry - Hydrogen and Its compound Question with Solution | TestHub

Select total number of correct statement/s

(1) The oxide and peroxide of alkali metals are colourless while superoxide are yellow or orange.

(2)The oxide and peroxide of alkali metal don't give oxygen on hydrolysis while superoxide give oxygen as one of the product on hydrolysis.

(3) All nitrate salt of alkali metals give oxygen on heating.

(4) Thermal decomposition of ${\left({\mathrm{NH}}_4\right)}_2{\mathrm{BeF}}_4$ is the best route for the preparation of ${\mathrm{BeF}}_2$.

(5) For a good quality cement, the ratio of silica $\left({\mathrm{SiO}}_2\right)$ to alumina $\left({\mathrm{Al}}_2{\mathrm{O}}_3\right)$ should be between 2.5 to 4

(6) ${\mathrm{H}}_2{\mathrm{O}}_2$ have more dihedral angle in gas phase from solid phase

(7) When CaC₂ react  with D₂O than CD₄ is form as a  product.

(8) When ${\mathrm{H}}_2{\mathrm{O}}_2$ react with ${\mathrm{N}}_2{\mathrm{H}}_4$ than ${\mathrm{N}}_2$ gas evolve