List of practice Questions

Benzene on heating with conc. $H_2SO_4$ gives benzenesulphonic acid which when heated with superheated steam under pressure gives benzene. Sulphonation is a reversible process.
Auditory ossicles are small bones present in the cavity of inner ear. Auditory ossicles maintain the balance of air pressure between two sides of ear drum.
Adrenaline is called an emergency hormone. It acts on the cells of skeletal, cardiac, smooth muscles, blood vessels and fat cells.
A primary amine has higher boiling point than any tertiary amine. A tertiary amine has greater number of $N - H$ bonds for $H$-bonding.
Holandric genes are located
Centre of DNA Fingerprinting and Diagnostics $(CDFD)$ is located at
The function of nitrogen fixation in Anabaena (cyanobacterium) is performed by
In a bacterium, the amount of adenine was found to be $18$ percent. Suggest the cytosine base composition from the following
$pBR _{322}$, which is frequently used as a vector for cloning gene in $E$. coli is a/an
The main function of the white blood cell in the human intestine system is to
Which one of the following is the best stage to observe the shape, size and number of chromosomes in a cell?
In the blood of an adult man the total content of haemoglobin is roughly
Sinking of zooplankton during the day and rising to the surface at night is an example of
Animals take phosphorus from
The value of DC voltage in half wave rectifier in converting AC voltage V = 100 gm (314 t) into DC is
Mean free path of gas molecule at constant temperature is inversely proportional to
If half-Iife of radio isotope is 2 s and number of atoms is 25. The activity of a radioactive sample is measured as only 4, then after one half-life, the remaining atoms are
What controls the conduction of p-n function?
Angular resolving power of human eye is
Simple behaviour under all conditions of real gas is governed by the equation
Electric field and current density have relation
An open water tight railway wagon of mass $ 5\times 10^{3}kg $ coasts at an initial velocity of $1.2\,ms^{-1}$ without friction on a railway track. Rain falls vertically downwards into the wagon. What change occurs in KE of the wagon, when it has collected $10^3\, kg$ of water?
Two coherent monochromatic light beams of intensities $ I $ and 9 $ I $ are superimposed. The maximum and the minimum intensities of the resultant beams are
In a single slit diffraction pattern, the distance between the first minimum on the left and the first minimum on the right is 5 mm. The screen on which the diffraction pattern is displayed is at a distance of 80 cm from the slit. The wavelength is $ 6000{AA} $ The slit width (in mm) is about
When a ray is incident on a medium of refractive index n at Brewster's angle, it gets