List of practice Questions

An object stands 4 cm in front of a converging lens. If the lens has a focal distance of 1 cm, where is the image formed?

The image seen in a flat bathroom mirror is a

If electrical force between two charges is 200 N and we increase 10% charge on one of the charges and decrease 10% charge on the other, then electrical force between them for the same distance becomes

What is the conjugate base of H$_2$SO$_4$?

If the dipole moment of HBr is $ 2.60 \times 10^{-30} \, \text{Cm} $ and the interatomic spacing is 1.41 Å, then the percent ionic character of HBr is:

In the redox reaction \[ \text{MnO}_4^- + \text{C}_2\text{O}_4^{2-} \to \text{Mn}^{2+} + \text{CO}_2 + \text{H}_2\text{O} \] The correct coefficients of $ \text{C}_2\text{O}_4^{2-} $ and $ \text{H}^+ $ are

In a sodium-sulphur battery, what is the half reaction for sodium in the spontaneous direction?

Which of the following is not a true statement about ozone?

Benzene and toluene combine to form an ideal solution. At 80°C, vapour pressure of pure benzene is 800 mmHg and the vapour pressure of pure toluene is 300 mmHg. If the vapour pressure of the solution is 400 mmHg, what are the mole fractions of benzene and toluene?

Which of the following statements about halogens are correct?

Terylene is a condensation polymer of ethylene glycol and

The correct increasing order of solubility of sulphates in water is:

Sulphur(s) when react with HNO$_3$ (conc.) Green mainly gives:

Consider the following reactions, C(s) + O2(g) → CO2(g), $\Delta$ H = -94$\text{ kcal}$ 2CO(g) + O2 → 2CO2(g), $\Delta$ H = -135.2$\text{ kcal}$ Then, the heat of formation of CO (g) is: