KCET · Chemistry · p Block Elements (Group 15, 16, 17 & 18)
The correct decreasing order of boiling point of hydrogen halides is
- A \(\mathrm{HF}\gt\mathrm{HCl}\gt\mathrm{HBr}\gt\mathrm{HI}\)
- B \(\mathrm{HI}\gt\mathrm{HBr}\gt\mathrm{HCl}\gt\mathrm{HF}\)
- C \(\mathrm{HF}\gt\mathrm{HI}\gt\mathrm{HBr}\gt\mathrm{HCl}\)
- D \(\mathrm{HI}\gt\mathrm{HF}\gt\mathrm{HBr}\gt\mathrm{HCl}\)
Answer & Solution
Correct Answer
(C) \(\mathrm{HF}\gt\mathrm{HI}\gt\mathrm{HBr}\gt\mathrm{HCl}\)
Step-by-step Solution
Detailed explanation
HF is hydrogen bonded, thus it has highest boiling point. The remaining hydrogen halides are gaseous and their boiling points depend on the van der Waals' forces. Greater the molecule mass, greater will be the van der Waals' forces. Hence higher is the boiling point. Thus, the correct order is \(\mathrm{HF}\gt\mathrm{HI}\gt\mathrm{HBr}\gt\mathrm{HCl}\).
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- The complex hexamineplatinum(IV)chloride will give number of ions on ionisation.KCET 2022 Easy
- Which one of the following is an intermediate in the reaction of benzene with \(\mathrm{CH}_{3} \mathrm{Cl}\) in the presence of anhydrous \(\mathrm{AlCl}_{3}\) ?KCET 2011 Easy
- How many coulombs are required to oxidise 0.1 mole of \(\mathrm{H}_2 \mathrm{O}\) to oxygen?KCET 2024 Easy
- When salt BA is treated with Conc. \(\text{H}_2\text{SO}_4\) reddish brown gas is liberated. The aqueous solution of BA gives pale yellow precipitate with \(\text{AgNO}_3\) solution. Which of the following anion (\(\text{A}^-\)) is present in the salt BA?KCET 2026 Medium
- If an aqueous solution of \(\mathrm{NaF}\) is electrolysed between inert electrodes, the product obtained at anode isKCET 2020 Medium
- In which of the following compounds, an element exhibits two different oxidation states?KCET 2022 Easy
More PYQs from KCET
- The vapour pressures of two liquids \(A\) and \(B\) in their pure states are in the ratio of \(1: 2\). A binary solution of \(A\) and \(B\) contains \(A\) and \(B\) in the mole proportion of \(1: 2\). The mole fraction of \(A\) in the vapour phase of the solution will beKCET 2012 Easy
- A mixture of \(\mathrm{CaCl}_{2}\) and \(\mathrm{NaCl}\) weighing \(4.44 \mathrm{~g}\) is treated with sodium carbonate solution to precipitate all the \(\mathrm{Ca}^{2+}\) ions as calcium carbonate. The calcium carbonate so obtained is heated strongly to get \(0.56 \mathrm{~g}\) of \(\mathrm{CaO}\). The percentage of \(\mathrm{NaCl}\) in the mixture (atomic mass of \(\mathrm{Ca}=40\) ) isKCET 2010 Medium
- Die input characteristics of a transistor in CE mode is the graph obtained by plottingKCET 2015 Easy
- Let \(f: R \rightarrow R\) be defined by \(f(x)=x^2+1\). Then, the pre images of 17 and -3 . respectively areKCET 2024 Easy
- In figure \(E\) and \(v_{\mathrm{cm}}\) represent the total energy and speed of centre of mass of an object of mass \(1 \mathrm{~kg}\) in pure rolling. The object is
KCET 2021 Hard - The electric field lines on the left have twice the separation on those on the right as shown in figure. If the magnitude of the field at \(A\) is \(40 \mathrm{Vm}^{-1}\), what is the force on \(20 \mu \mathrm{C}\) charge kept at \(B\) ?
KCET 2020 Easy