List of top Chemistry Questions on Solid State asked in IPU CET

A balloon contains 2.0 g of hydrogen gas. A second balloon contains 4.0 g of helium gas. Both balloons are at the same temperature and pressure. Pick the false statement from the following list.
Silica is a network solid of silicon and oxygen atoms. The empirical formula for silica is SiO₂. In silica, to how many oxygen atoms is each silicon bonded?
An imaginary metal crystallises in a cubic lattice. The unit cell edge length is 100 pm, (1 pm = $10^{-12}$ m). The density of this metal is 200 g/cm\(^3\). The atomic mass of the metal is 60.2 g/mol. How many of these metal atoms are there within a unit cell?