NEET Chemistry Some Basic Concepts in Chemistry Mole Concept MCQs

A mixture of $CaCO_3$ and $MgCO_3$ weighing 1.84 g on heating leaves a residue weighing 0.96 g. If the percentage by mass of $CaCO_3$ in the original mixture is x%, what is the value of x/2?

Rank the following samples from least to greatest number of atoms:

I. 5 g of $H_2$

II. 5 g of $O_2$

III. 5 g of $N_2$

IV. 5 g of $Cl_2$

In which of the following is the number of water molecules maximum?

A mixture of $2.3$ g formic acid and $4.5$ g oxalic acid is treated with conc. $H_2SO_4$. The evolved gaseous mixture is passed through $KOH$ pellets. The weight (in g) of the remaining product at STP will be

A mixture of $1.2$ g formic acid and $2.25$ g oxalic acid is treated with conc. $H_2SO_4$. The evolved gaseous mixture is passed through $KOH$ pellets. Calculate the mass (in g) of the remaining product at STP.

Upon treating a mixture of $0.46$ g of formic acid and $0.9$ g of oxalic acid with concentrated $H_2SO_4$, a gaseous mixture is evolved. This mixture is then passed through pellets of $KOH$. Determine the mass (in g) of the remaining product at STP.

If $4.6$ g of formic acid and $9.0$ g of oxalic acid react with concentrated $H_2SO_4$, and the resulting gaseous mixture is passed through $KOH$ pellets, what mass of gas (in grams) will remain at STP?

Calculate the mass (in g) of the gaseous product remaining at STP when a mixture of $9.2$ g formic acid and $18$ g oxalic acid is treated with conc. $H_2SO_4$ and then passed through $KOH$ pellets.

What is the mass of the precipitate formed when 50 mL of 16.9% solution of $\AgNO_3$ is mixed with 50 mL of 5.8% NaCl solution?

What mass of AgCl is precipitated when 25 mL of a 8.45% $\AgNO_3$ solution is mixed with 50 mL of a 5.8% NaCl solution?