List of practice Questions

Cartilaginous fishes belong to the class

To which of the following category dinosaurs belong ?

The part which is grafting on stalk of another tree is called

Phytol chain is present in

First stable product of C plants is

Bakanae disease was due to

Skin is said to play an important role in excretion due to presence of

Which of the following is a distinct character ?

One of the following is a distinct feature of birds

Cyclin protein is required for cell cycle. Which other molecule is essential for completion of cell cycle ?

Stomata open in the daytime due to

"Bt" toxin is

Which of the following statements is true ?

Which is the most distinct character of fishes ?

Blastula of frog is:

The outermost layer of exine of a pollen grain is made up of

Benedict's solution is not reduced by

Based on cellular mechanisms there are two major types of regeneration found in the animals. Which one of the following is the correct example of the type mentioned?

Assuming earth to be sphere of uniform density what is the value of acceleration due to gravity at a point $100\, km$ below the earth surface (Given $R=6380\,\times 10^{3}\,m$)

The clouds in sky generally appear to be whitish. Diffraction due to clouds is efficient in equal measure at all wavelengths.

Specific gravity of a fluid is a dimensionless quantity. It is the ratio of density of fluid to the density of water.

$SiF_6^{2-}$ is known but $SiCl_6^{2-}$ is not. Size of fluorine is small and its lone pair of electrons interacts with d-orbitals of $Si$ strongly.

Reaction of $SO_2$ and $H_2S$ in the presence of $Fe_2O_3$ catalyst gives elemental sulphur. $SO_2$ is a reducing agent.

Rates of nitration of benzene and hexadeuterobenzene are different. $C - H$ bond is stronger than $C - D$ bond.

Ozone is a powerful oxidising agent in comparison to $O_2$ . Ozone is diamagnetic but $O_2$ is paramagnetic.