Predict the reason(s) for the observation in boiling points `HF gt HBr gt HCI.`

Give reasons for the higher bioling point of H_2 O than HF and NH_3

Predict the reasons for low melting point for covalent compounds when compared with ionic compounds.

The reason for the noble gases to have low boiling and low melting point is

Would you expect the hydrides of N,O and F to have lower boiling points than the hydrides of their sub sequent group members? Give reasons.

A choke coil in series with a lamp is connected to a dc line. The lamp is seen to shine brightly. Insertion of an iron core in the choke causes no change in the lamp’s brightness. Predict the corresponding observations if the connection is to an ac line.

2 Give reason for the higher boiling point of ethanol in comparison to methoxymethane.

From the following given statements of the order of dipolemoments. (I ) HF gt H_2 O gt NH_3 (ii ) CH_3Cl gt CH_2 Cl_2 gt CHCl_3 gt C Cl_4 the correct combination is

Which of the following properties does not correspond to the order given below: HI < HBr < HCI

The decreasing order of acidic character among hypohalogen acids is HClO gt HBrO gt HIO . Give reason.

Assertion (A): Alkali metals are soft and have low Melting and boiling points. Reason (R): This is because interatomic bonds are weak.