i. Hydrogen bonding is the cause for several peculiar properties of water in the liquid and solid states. What are those properties?
ii. Water forms several types of hydrates with metal salts. Discuss any two of them with examples.

Assertion : In epsom salt, there are six water molecules are co-ordinated to Mg metal atom Reason : In epsom salt, only two molecules of water are hydrogen bonded to SO_(4)^(2-) ion (I) Both assertion and reason are true and reason is the correct explanation of assertion (II) Both assertion and reason are true and reason is not the correct explanation of assertion (III) Assertion is true and reason is false (IV) Both assertion and reason are false

H_2O is a covalent molecule and the two O-H bonds are of polar nature. The H_2O molecules are involved in intermolecular hydrogen bonding both in water and ice which differ in their relative densities. What type of structure does ice possess?

A horizontal metal wire is fixed on a state of tension between two vertical supports when plucked it gives a fundamental frequency f_0 . What change,if any,will be observed in the fundamental frequency if the wire is now immersed in water and plucked again?

Themal decomposition of ammonium tetrafluoroberyllate gives X, heating Beryllium oxide with carbon and Cl_(2) gas at 600-800 K gives Y and reduction of Y using is LiAlH_(4) is Z. Then I) X has electronegativity difference of 2.5 and exhibit covalent nature II) Y shows acidic nature in water III) The O-H bond strengthens in the hydrated ion formed on the hydrolysis of Y IV) In Z, the oxidationi state of H is +1