Question 5 : The ability of the molecules of graphite held together to slide pass one another imparts in it ___________.
Brittleness
Softness
Rigidity
Lustre
Question 6 : Which of the following statement is correct?
When passed in water, SiF4 is hydrolysed to give soluble H2SiF6
Hydrolysis of silicon tetrachloride gives silicic acid
Silica is soluble in water
Silica is soluble in acids except hydrofluoric acid
Question 7 : Diamond behaves as an insulator because of __________.
Strong ionic bonds formed within its molecule restricting mobility of electrons
Strong covalent bonds formed within its molecule restricting mobility of electrons
Intermolecular bonding formed between adjacent atoms of the molecule
Intramolecular bonding formed within the molecule
Question 8 : ___________ occurs in the elemental state as diamond and graphite.
Tin
Germaniun
Carbon
Silicon
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