Halogen compounds: HX, oxoacids, bleaching powder

28 questions on Halogen compounds: HX, oxoacids, bleaching powder from the p-Block Elements: Groups 17 and 18 chapter: 6 NEET level, 11 JEE Main, 11 JEE Advanced. Each one opens with its answer and solution.

• Which hydrogen halide is the strongest acid in aqueous solution? NEET level
• The formula usually assigned to bleaching powder is NEET level
• Bleaching powder is manufactured by passing chlorine over NEET level
• Hydrofluoric acid cannot be stored in glass bottles because NEET level
• The oxidation state of chlorine in perchloric acid, HClO4, is NEET level
• Which hydrogen halide has the highest boiling point? NEET level
• The correct order of increasing reducing power of the hydrogen halides is JEE Main level
• HI cannot be prepared in a pure form by heating NaI with concentrated H2SO4 because JEE Main level
• The correct order of acid strength of the oxoacids of chlorine is JEE Main level
• Which of the following chlorine species cannot undergo disproportionation? JEE Main level
• Bleaching powder is (i) treated with excess dilute H2SO4 and (ii) heated with a small amount of a cobalt salt. The gases evolved in (i) and (ii) are respectivel... JEE Main level
• HF is a much weaker acid than HCl in water. The main reason is JEE Main level
• Using Lewis structures in which chlorine forms Cl=O double bonds (no charge separation), the total number of Cl=O bonds present in the four molecules HOCl, HClO... JEE Main level
• A 2.00 g sample of bleaching powder is shaken with water, and excess KI and acetic acid are added. The liberated iodine needs 42.2 mL of 0.250 M Na2S2O3 solutio... JEE Main level
• Select the correct statement(s) about the hydrogen halides. JEE Main level
• Select the correct statement(s) about bleaching powder. JEE Main level
• Select the correct statement(s) about the oxoacids and oxoanions of chlorine. JEE Main level
• Sodium hypochlorite on warming disproportionates as 3NaOCl -> 2NaCl + NaClO3. The number of electrons transferred per formula unit of NaClO3 formed is JEE Advanced level
• Consider these statements. (1) HF can be made by heating CaF2 with concentrated H2SO4. (2) Pure HBr can be made by heating NaBr with concentrated H2SO4. (3) HI ... JEE Advanced level
• Assertion (A): HF is the weakest acid among the hydrogen halides in water. Reason (R): Fluorine is the least electronegative halogen. JEE Advanced level
• Using Lewis structures with Cl=O double bonds and no charge separation, the total number of lone pairs on all atoms (Cl and O) in the four molecules HOCl, HClO2... JEE Advanced level
• Iodine reacts with hot concentrated nitric acid to give iodic acid, HIO3, and nitrogen dioxide. How many moles of NO2 are formed per mole of I2 oxidised? JEE Advanced level
• HOCl has pK_a = 7.5. To 20 mL of 0.10 M HOCl are added 10 mL of 0.10 M NaOH and then 5 mL of 0.10 M HCl. Ignoring any dilution effect in the ratio, the pH of th... JEE Advanced level
• Bleaching powder, Ca(OCl)Cl, releases chlorine on treatment with dilute acid. This happens because JEE Advanced level
• Bleaching powder with 36.0 per cent available chlorine (by mass) is treated with excess dilute H2SO4. Calculate the mass of bleaching powder needed to liberate ... JEE Advanced level
• Select the correct statement(s) about the oxoacids of the halogens. JEE Advanced level
• Select the correct statement(s) about the hydrogen halides. JEE Advanced level
• Select the correct statement(s) about bleaching powder (Ca = 40, O = 16, Cl = 35.5). JEE Advanced level