List of practice Questions

Air is filled at $60^{\circ} C$ in a vessel of open mouth. The vessel is heated to a temperature $T$ so that $1/4^\text{th}$ part of air escapes. Assuming the volume of the vessel remaining constant, the value of $T$ is

Okazaki is known for his contribution to the understanding of

A thin convergent glass lens $ \mu =1.5 $ has a power of $ +5.0\,D $ . When this lens is immersed in a liquid of refractive index $ \mu _{1} $ it acts as a diverging lens of focal length $ 100\,cm $ . The value of $ \mu _{l} $ should be

What is the freezing point of a solution containing $ \text{8}\text{.1 g HBr} $ in 100 g water assuming the acid to be 90% ionised? ( $ {{k}_{f}} $ for water $ =1.86\,\text{K}\,\text{mo}{{\text{l}}^{-1}} $ )

A reversible engine converts one-sixth of the heat input into work. When the temperature of the sink is reduced by 62$^{\circ}$C, the efficiency of the engine is doubled. The temperatures of the source and sink are

If the charge on a capacitor is doubled, the value of its capacitance $C$ will be

Which of the following is optically active?

Which of the following is paramagnetic with bond order $0.5$?

Which of the following statements is true for the electrochemical Daniell cell?

Which of the following thermodynamic relation is correct ?

Which one of the following compounds is a peroxide?

Which one of the following compounds has the most acidic nature?

Which one of the following cannot be used as a moderator in a nuclear reactor?

Which one of the following ions has electronic configuration $[Ar] 3d^6 ? $ (At.no. $Mn =25, Fe = 26,Co =27, Ni = 28)$

Which one of the following is not a lateral meristem?

Which one of the following molecular hydrides acts as a Lewis acid?

Which of the following conformers for ethylene glycol is most stable ?

Which of the following are used in gene cloning ?

Vegetative propagation in Pistia occurs by

van der Waals equation of state is obeyed by real gases. For $ n $ moles of a real gas, the expression will be

Insulin, a hormone, chemically is

In the following transitions, which one has higher frequency?

If one face of prism is silvered having prism angle $ 30{}^\circ $ and $ \mu =\sqrt{2}. $ What will be the angle of incidence, so that the incident ray retraces its path?

If refractive index of glass is $1.50$ and of water is $1.33$, then critical angle is

If increase in linear momentum of a body is $50\%$, then change in its kinetic energy is