List of practice Questions

An ester $ (A) $ with molecular formula $ C_9H_{10}O_2 $ was treated with excess of $ CH_3MgBr $ and the complex so formed was treated with $ H_2SO_4 $ to give an olefin $ (B) $ . Ozonolysis of $ (B) $ gave a ketone with molecular formula $ C_8H_8O $ which shows positive iodoform test. The structure of $ (A) $ is
The final product of the following reaction is/are
One possible condition for the three points $(a, 5), (b, a)$ and $(a^2, - b^2)$ to be collinear is
If $\,^{16}C_{r} =\, ^{16}C_{r+1}$, then the value of $\, ^{r}P_{r-3}$ is
Which of the following is chiral?
The phenomenon observed when a beam of light is passed through a colloidal solution, is
The graph between the time period and the length of a simple pendulum is
A hollow sphere is filled with water through the small hole in it. It is then hung by a long thread and made to oscillate. As the water slowly flow out of the hole at the bottom, the period of oscillation will
If $ g $ is the acceleration due to gravity on earth?s surface, the gain of the potential energy of an object of mass $ m $ raised from the surface of the earth to a height equal to the radius $ R $ of the earth is
The charge carriers in a $ p $ -type semiconductor are
Solutions $ A $ , $ B $ , $ C $ and $ D $ are respectively $ 0.1\, M $ glucose, $ 0.05 \,M\, NaCl $ , $ 0.05 \,M\, BaCl_2 $ and $ 0.1\, M\,AlCl_3 $ . Which one of the following pairs is isotonic ?
In the reaction $ 2 A + \text{dry silver oxide} \xrightarrow { \triangle } \, \text{ether} + 2 \, AgX $ A is a/an
The correct order of boiling point for primary $ (1^{\circ}) $ , secondary $ (2^{\circ}) $ and tertiary $ (3^{\circ}) $ alcohols is
Which of the following while in motion cannot be deflected by magnetic field ?
Tranquilisers are also known as
The charge carriers in a p-type semiconductor are
The binary number $10111$ is equivalent to the decimal number
The speed of sound in hydrogen at NTP is $1270 \,ms$ Then, the speed in a mixture of hydrogen and oxygen in the ratio $4 : 1$ by volume will be
Total number of rare earth elements is
A body of mass 10 kg initially at rest acquires velocity $10 ms^{-1}$. What is the work done
Coralloid root is the feature of:
A block (5) is attached to two unstretched springs $ S_1 \, \, and \, \, S_2 $ with spring constants k and 4k, respectively. The other ends are attached to two supports $ M_1 $ and $ M_2 $ not attached to the walls. The springs and supports have negligible mass. There is no friction anywhere. The block B is displaced towards wall 1 by a small distance x and released. The block returns and moves a maximum distance y towards wall 2. Displacements x and y are measured with respect to the equilibrium position of the block B. The ratio $\frac{y}{x}$ is
The area of the acceleration-displacement curve of a body gives
Abnormal colligative properties are observed only when the dissolved non-volatile solute in a given dilute solution
Meselson Stahl experiment on semi- conservative replication demonstrates that