List of practice Questions

The molecular weight of $O_2$ and $SO_2$ are 32 and 64 respectively. At $15^{\circ}C$ and 150 mmHg pressure, 1L of $O_2$ contains -N - molecules. The number of molecules in 2L of $SO_2$ under the same conditions of temperature and pressure will be
How many sperms are formed from a secondary spermatocyte?
Among $LiCl, BeCl_2, BCl_3 $and $CCl_4$ , the covalent bond character follows the order
Which ones produce androgenic haploids in anther cultures?
EMP can produce a total of
NADP is reduced to NADPH in
Vivipary is characteristic of
Apophysis in the capsule of Funaria is
An inductor may store energy in
A radio transmitter operates at a frequency 880 kHz and a power of 10 kW. The number of photons emitted per second is
A $600\, kg$ rocket is set for a vertical fring. If the exhaust speed is $1000 \,ms^{-1}$ the mass of the gas ejected per second to supply the thrust needed to overcome the weight of rocket is
In which of the following, emission of electrons does not take place
Velocity of sound waves in air is 330 m/s. For a particular sound wave in air, a path difference of 40 cm is equivalent to phase difference of $1.6\, \pi$. The frequency of this wave
The composition of two simple harmonic motions of equal periods at right angle to each other and with a phase difference of $\pi$ results in the displacement of the particle along
In man the zymogen or chief cells are mainly found in
The magnetic induction at a point P which is at the distance of 4 cm from a long current carrying wire is $ 10^{-3}$ T. The field of induction at a distance 12 cm from the current will be
Skin is an accessory organ of respiration in
If $\Delta H$ is the change in enthalpy and $\Delta E$, the change in internal energy accompanying a gaseous reaction, then
Linear combination of two hybridised orbitals belonging to the two atoms, each having one electron leads to a
Absolute zero is defined as the temperature
In the network shown in figure each resistance is $1\, \Omega.$ The effective resistance between A and B is
How much water a pump of 2 kW can raise in one minute to a height of 10 m? (take g = 10 m/s$^2$)
Which statement is not correct?
An organic compound X(molecular formula C6H7O2N) has six carbon atoms in a ring system, two double bonds and a nitro group as substituent, X is
Boron has two stable isotopes, $^{10}B (19 \%)$ and $ ^{11}B (81\%)$. Calculate average atomic weight of boron in the periodic table.