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
Arrange the following:
CaH2, BeH2 and TiH2 in order of increasing electrical conductance.
What properties of water make it useful as a solvent? What types of compound can it (i) dissolve, and (ii) hydrolyse?
Why is it said that-
Water is a universal solvent.
Explain the picture in your own words.
Which of the following equations depict the oxidising nature of \[\ce{H2O2}\]?
Give reasons: Lakes freeze from top towards bottom.
Give reasons: Ice floats on water.
Why does water show high boiling point as compared to hydrogen sulphide? Give reasons for your answer.
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.
What is the taste of distilled water & boiled water?
What are the physical properties of pure 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.
The water having more dissolved O2 is ______.
