Fist four questions answer 

Q1. Suppose a charge +Q₁ is given to the positive plate and a charge –Q₂ to the negative plate of a capacitor. What is the "charge on the capacitor"?

Q2. As C = $\left(\frac{1}{\mathrm{V}}\right)\mathrm{Q}$, can you say that the capacitnace C is proportional to the charge Q?

Q3. A hollow metal sphere and a solid metal sphere of equal radii are given equal charges. Which of the two will have higher potential?

Q4. The plates of a parallel-plate capacitror are given equal positve charges. What will be the potential difference between the plates? What will be the charges on the facing surfaces and one the outer surfaces?