Calculate the wavelength of 1st line of Balmer series in Hydrogen spectrum.

Find out the ratio of the moles of hydrogen and carbon dioxide obtained after 6 successive effusion step initially present in 1:1 molar ratio

Answer Key: 22^6

5.7 g of bleaching powder was suspended in 500 mL of water. 25 mL of this suspension on treatment with KI and HCl liberated iodine which reacted with 24.35 mL of 10N​ Na2​S2​O3​. Calculate the percentage of available chlorine in bleaching powder.

Answer Key: 30.33 %