List of practice Questions

Which aquatic fern performs nitrogen fixation
Anemophily type of pollination is found in
Which statement correct about centre of origin of plant
What is true for plasmid
What is the best pH of the soil for cultivation of plants
Enzyme first used for nitrogen fixation
What is true for cyanobacteria
When water moves through a semi permeable membrane then which of the following pressure develops?
Which pair is wrong
Proteinaceous pigment which control the activities concerned with light
Roots of which plant contains a red pigment which have affinity for oxygen
Triticale is obtained by crossing wheat with
In grasses what happens in micro spore mother cell for the formation of mature pollen grains
The dimensions of Planck constant equals to that of
A black body has wavelength $\lambda_m$ corresponding to maximum energy at 2000 K. Its wavelength corresponding to maximum energy at 3000 K will be:
Frequency of an allele in an isolated population may change due to
An electron having mass m and kinetic energy E enter in uniform magnetic field B perpendicularly, then its frequency will be
In preparation of alkene from alcohol using $ Al_2 O_3$, which is effective factor?
Which of the following compounds on boiling with $KMnO_4 $(alk.) and subsequent acidification will not give benzoic acid ?
Grignard reagent is not prepared in aqueous medium but it is prepared in ether medium because
In the figure shown a block of weight 10 N is resting on a horizontal surface (figure). The coefficient of static friction between the block and surface is force of 3.5 N will keep the block in uniform motion, once it has been set in motion. A horizontal force of 3 N is applied to the block then:
a block of weight 10 N is resting on a horizontal surface
Interferons are synthesized in response to
A sine wave has an amplitude A and wavelength $\lambda$ . Let V be the wave velocity and maximum velocity of a particle in the medium. Then
How many moles of acidified $FeSO_4$ solution canbe completely oxidised by one mole of $KMnO_4$ ?
In the presence of cobalt chloride $(CoCl_2)$,bleaching powder decomposes to form....