List of practice Questions

In spiral phyllotaxy, the number of leaves at each node is

In spite of being an odd-electron molecule $ClO_2$ does not dimerize because

In $SiO_{4}^{4-}$ , the tetrahedral molecule, two oxygen atoms are shared in

In sky-wave propagation, skip-distance depends on :

In solid state $PCl_5$ is a _______.

In Solvay ammonia process, sodium bicarbonate is precipitated due to

In SI, the unit of latent heat is

In SI, unit of quantity of heat is

In sickle cell anaemia glutamic acid is replaced by valine. Which one of the following triplets codes for valine ?

In single slit diffraction pattern

In $S_{N^1}$ reaction, . the recimisation takes place due to

In pyrophosphoric acid, $H_4P_2O_7$, number of $?$- and $d?-p?$ bonds respectively are

In recombinant $DNA$ technology, the term vector refers to

In Rosenmund's reaction

In Rutherford experments on $\alpha$ - ray scattering the number of particles scattered at $90^\circ$ be 28 per minute. Then the number of particles scattered per minute by the same foil but at 60$^\circ$ are

In prokaryotes, the genetic material is

In potato osmometer, which of the following process is involved?

In plants, mosaic formation, leaf rolling and curling, yellowing of plant parts, vein clearing, dwarfing and stunted growth, necrosis etc. are the symptoms of

In positive logic, the logic state 1 corresponds to

In potash alum, potassium and aluminium are present as

In Penicillium, the asexual reproduction takes place by

In ____ placentation, a monocarpellary ovary bears a single longitudinal ovule along the junction of two fused margins.

In plant cell, glycolysis operates in

In oxidation of oxalic acid by KMn$O_{4}$, the colour of KMn$O_{4}$ disappears slowly at the start of reaction but disappears very fast afterwards. This is an example of

In $p-n-p$ transistor circuit, the collector current is $10\, mA$. If $90\%$ of the holes reach the collector, the emitter and base currents respectively are