List of practice Questions

Ethylene gas is used for
During dehydration of alcohols to alkenes by heating with concentrated $H _{2} SO _{4}$ the initiation step is :
DNA is a polymer of
Which of the following is free-living, aerobic and non-photosynthetic nitrogen fixing bacterium?
In the animal body bold bank is :
Drinking of alcohol affects :
L.S.D. is obtained from :
Spinal cord is protected by :
Cotton fibre is
Binary fission is a form of
Enzyme used in DNA replication is
Pyruvic acid is a product of
Histones are
Histones are Meristematic tissues are composed of
Bernoulli's equation is a consequence of conservation of
At higher temperature, iodoform reaction is given by
The stars twinkle while the planets do not. The stars are much bigger in size than the planets.
Solution of $Na_2CrO_4$ in water is coloured. Oxidation state of $Cr$ in $Na_2CrO_4$ is $+6$.
Rhoeo leaves contain anthocyanin pigments in epidermal cells. Anthocyanins are accessory photosynthetic pigments.
$ {PbI4}$ is a stable compound. Iodide stabilizes higher oxidation state
$NF_3$ is a weaker ligand than $N(CH_3)_3$. $NF_3$ ionizes to give $F^-$ ions in aqueous solution.
Microwave communication is preferred over optical communication. Microwaves provide large number of channels and bandwidth compared to optical signals.
Holoblastic cleavage with almost equal-sized blastomeres is a characteristic of placental animals. Eggs of most mammals, including humans, are of centrolecithal type.
A circular ring of mass $ m $ and radius $ r $ is rolling on a smooth horizontal surface with speed $ u $ . Its kinetic energy is :
A satellite is revolving around the earth in a circular orbit of radius $4$ times that of the parking orbit. The time period of the satellite is :