Problem 1
The inert form of carbon is: (a) Graphite (b) Coal (c) Diamond (d) Charcoal
Problem 1
The compounds of boron and hydrogen are collectively called (a) Boranes (b) Boracits (c) Borazoles (d) Diboranes
Problem 2
Diamond and graphite are: (a) Allotropes (b) Isomers (c) Polymers (d) Isotopes
Problem 2
The alum used for purifying water is (a) Chrome alum (b) Ammonium alum (c) Potash alum (d) Ferric alum
Problem 3
\(\mathrm{BCl}_{3}\) is a planar molecule because in this molecule boron is (a) Sp ^{2} - \text { hybridised } (b) Sp-hybridised (c) Sp \(^{3}\) -hybridised (d) Sp \(^{3}\) d-hybridised
Problem 3
The geometry of \(\left(\mathrm{SiO}_{4}\right)^{4-}\) ion is: (a) Square planar (b) Tetrahedral (c) Planar triangular (d) Octahedral
Problem 4
Boron when heated with carbon forms (a) \(\mathrm{B}_{4} \mathrm{C}\) (b) \(\mathrm{B}_{2} \mathrm{C}_{3}\) (c) \(\mathrm{BC}_{2}\) (d) \(\mathrm{B}_{4} \mathrm{C}_{3}\)
Problem 4
Which of the following types of forces bind together the carbon atoms in diamond? (a) Dipolar (b) Van der Waal's (c) Ionic (d) Covalent
Problem 5
Heating an aqueous solution of aluminium chloride to dryness will give (a) \(\mathrm{AlCl}_{3}\) (b) \(\mathrm{Al}_{2} \mathrm{Cl}_{3}\) (c) \(\mathrm{Al}(\mathrm{OH}) \mathrm{Cl}_{2}\) (d) \(\mathrm{Al}_{2} \mathrm{Cl}_{6}\)
Problem 5
Poisonous gas present in the exhaust fumes of an automobile is: (a) \(\mathrm{CO}_{2}\) (b) \(\mathrm{CH}_{4}\) (c) \(\mathrm{CO}\) (d) \(\mathrm{C}_{2} \mathrm{H}_{6}\)
