Silicon Carbides

Q. Which one of the following allotropc forms of carbon is isomorphous with crystalline silicon?

1. Graphite
2. Coal
3. Coke
4. Diamond

Q. Carborundum has a structure similar to .

1. diamond
2. graphite
3. fullerenes

Q. Which one of the following species does not represent cationic species of vanadium formed in aqueous solution?

1. $V{O}_2^{+}$
2. $V{O}^{2+}$
3. ${\left[V{\left(H_{2}O\right)}_6\right]}^{3+}$
4. $V{O}_2^{2+}$

Q. Which of the following analogies is correct?
$\text{Graphite}:\text{Hexagonal}::\text{Titanium dioxide}:$

1. Triclinic
2. Tetragonal
3. Hexagonal
4. Cubic

Q. Carborundum has a structure similar to .

1. diamond
2. graphite
3. fullerenes