S 1 : In the solid B(OH) 3 units are hydrogen bonded together into two-dimensional sheets with almost hexagonal symmetry.
S 2 : Na 2 CO 3 is isomorphous with Na 2 SO 3 as both have similar formula type.
S 3 : XeO 3 F 2 has one lone pair of electron on central xenon atom.
S 4 : D 2 O has higher boiling point than H 2 O
Text Solution
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intermolecular hydrogen bonded. (true)
structure of anions are different CO 3 2– – trigonal planar (sp 2 ) 
SO 3 2– – trigonal pyramidal (sp 3 ) 
(false)
no lone pair of electrons (false)
True. D 2 O = 374.4 K ; H 2 O = 373.0 K
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