Advertisements
Advertisements
Question
Explain why \[\ce{HCl}\] is a gas and \[\ce{HF}\] is a liquid.
Advertisements
Solution
Due to greater electronegativity of \[\ce{F}\] over \[\ce{Cl, F}\] forms stronger \[\ce{H}\] – bonds as compared to \[\ce{Cl}\]. As a result, more energy is needed to break the \[\ce{H}\] – bonds in \[\ce{HF}\] than in \[\ce{HCl}\] and hence the b.p. of \[\ce{HF}\] is higher than that of \[\ce{HCl}\]. Consequently, \[\ce{H - F}\] is liquid while \[\ce{HCl}\] is a gas at room temperature.
APPEARS IN
RELATED QUESTIONS
Among NH3, H2O and HF, which would you expect to have highest magnitude of hydrogen bonding and why?
Arrange the following:
CaH2, BeH2 and TiH2 in order of increasing electrical conductance.
Why is it said that-
Water is a universal solvent.
Explain the picture in your own words.
Explain the various properties of water.
Which of the following equation depicts reducing nature of \[\ce{H2O2}\]?
Some of the properties of water are described below. Which of them is/are not correct?
(i) Water is known to be a universal solvent.
(ii) Hydrogen bonding is present to a large extent in liquid water.
(iii) There is no hydrogen bonding in the frozen state of water.
(iv) Frozen water is heavier than liquid water.
\[\ce{H2O2}\] is a better oxidising agent than water. Explain.
How will you account for 104.5° bond angle in water?
The boiling point of water increases with ______ in pressure.
The freezing point of water ______ with an increase in pressure.
Pure water boils at ______ °C at one atmospheric pressure.
Freezing of water will cause an ______ is the volume.
______ has the highest latent heat of fusion.
One gram of water requires ______ of heat to raise its temperature by l°C.
Water is circulated around the car engine using the ______ pump and the heat is absorbed.
What is the taste of distilled water & boiled water?
The density of gold is 19 g/cm3. If 1.9 × 10−4 g of gold is dispersed in one litre of water to give a sol having spherical gold particles of radius 10 nm, the number of gold particles per mm3 of the sol will be ______ × 106.
