i. HF exists a dimeric molecule ie. `HF` has higher viscocity or high boiling point. Explain. ii. Anhydrous `HCl` is a bad conductor of electricity but aqueous `HCl` is a good conductor. iii. Fluorine gives fumes with moist air?

Explanation

i.H aiom attached to more electronegative atoms like, .F.. N,or .O. has the tendency to show .H. bonding and thus HF molecules undergo cluster fơrmation dute to .H.. bond arid acquires dimeric nature and
A higher viscosity and higher boiling point.
ii. HCl is a covalent molecule and:thus it is a bad conductor of current. But in aqueous medium .HCl. is - ionised .t o_1 H^*. and .Cl^-. ions. Hence.it is a good
- conductor in aq. medium.
-iii: Fluorịne reacts with .H, O..to give .HF^prime. which being
". liquid absorbs.liquid droplets to form fumes. .2 ~F_2+2 H_2 O rarr .4 HF+O_3.