NEET Questions

10 g of a mixture of $NaHCO_3$ and $Na_2CO_3$ has 1.68 g of $NaHCO_3$. On heating, if the residue weighs 8.28 g, what is the percentage purity of $Na_2CO_3$ in the mixture?

A 2.00 g sample of a mixture of $CaCO_3$ and $CaSO_4\cdot2H_2O$ was heated to a constant mass of 1.55 g. What percent by mass of the original sample was $CaCO_3$?

10 g of calcium carbonate ($CaCO_3$) on heating produces how many grams of calcium oxide ($CaO$)? (Atomic masses: Ca = 40, C = 12, O = 16)

The decomposition of which of the following oxides produces a paramagnetic gas?

In the autocatalytic decomposition of hydrogen peroxide, the rate of decomposition of $H_2O_2$:

Hydrogen peroxide decomposes on its own into which substances?

Hydrogen peroxide is stored in wax-lined glass or plastic vessels in dark. Why?

In a decomposition reaction, a single compound breaks down into:

$KMnO_4$ is stored in dark bottles because:

Which pair of factors has the MOST significant influence on the decomposition rate in a terrestrial ecosystem?