Equal masses of oxygen and ozone are present in a container at 298 K. The ratio of their partial pressures ($P_{O_2} : P_{O_3}$) is:

Which one of the followings has maximum number of atoms ?

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 $Cl_2$

The Largest number of molecules is in

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?

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

50 mL of a $\AgNO_3$ solution reacts completely with 50 mL of a 2.9% NaCl solution to form 3.587 g of AgCl precipitate. What is the percentage concentration of the $\AgNO_3$ solution?

Which of the following samples contain the least number of atoms

Suppose the elements X and Y combine to form two compounds $X{Y_2}$ and ${X_3}{Y_2}$. When 0.1 mole of $X{Y_2}$ weights 10 g and 0.05 mole of ${X_3}{Y_2}$ weights 9 g, the atomic weights of X and Y are

A 0.50 $M$ solution of $KI$ reacts with excess of ${{\rm{H}}_2}{\rm{S}}{{\rm{O}}_4}$ and ${\rm{KI}}{{\rm{O}}_3}$ solutions according to the equation, $6{{\rm{H}}^ + } + 5{{\rm{I}}^ - } + {\rm{IO}}_3^ - o 3{{\rm{I}}_2} + 3{{\rm{H}}_2}{\rm{O}}$. Which of the following statements is true?

Arrange the following in increasing order of the number of atoms present:

(i) 2 g of He

(ii) 4 g of $H_2$

(iii) 8 g of $O_2$