List of practice Questions

If the dimensions of a physical quantity are given by $[M^{a}L^{b}T^{c}]$, then the physical quantity will be

For the redox reaction, $Zn + NO _{3}^{-} \longrightarrow Zn ^{2+}+ NH _{4}^{+}$ in basic medium, coefficients of $Zn , NO _{3}^{-}$, and $OH ^{-}$in the balanced equation respectively, are

Oxidation number of $S$ in $ H_{2}S_{2}O_{8}$ is

How many bonds does $B_{2}$ have?

How many coulombs of electricity are required for reduction of $1$ mole of $ MnO_{4}^{-} $ to $ Mn^{2+}$ ?

Which of the following metal sols cannot be prepared by Bredig's arc metliod?

Global agreement in specific control strategies to reduce the release of ozone depleting substances was adopted by

Which one of the following is not true ?

Chipko movement was launched for the protection of

Biochemical oxygen demand (BOD) in a river water

The presence of tube feet is a characteristic feature of the phylum

Consider the following statements and choose the correct option. (I) The genetic constitution of a plant is unaffected in vegetative propagation. (II) Rhizome in ginger serves as an organ of vegetative reproduction. (III) Totipotency of cells enables us to micropropagate plants.

Which one of the following is not air pollutant ?

$DDT$ residues are rapidly passed through food chain causing biomagnification because $DDT$ is

Two luminous point sources separated by a certain distance are at $10 \, km$ from an observer. If the aperture of his eye is $2.5 \times 10^{-3}\,m$ and the wavelength of light used is $500 \, nm$, the distance of separation between the point sources are just seen to be resolved is

Which of the following is not correct regarding the elecolytic preparation of $H_{2}O_{2}$ ?

Which of the following reactions involves carbon-carbon bond formation

Which of the following coordination entities should be expected to absorb light of lowest frequency?

The unit of magnetic moment is

A motor cycle starts from rest and accelerates along a straight path at $2\, m/s^2$. At the starting point of the motor cycle there is a stationary electric sire. How far has the motor cycle gone when the driver hears the frequency of the siren at 94% of its value when the motor cycle was at rest? (speed of sound $= 330 \,ms^{-1}$).

Branch of zoology dealing with the study of fishes is called

Which insecticide is more hazardous to human health ?

The width of DNA molecule is

A monocarpic plant is one which

Lowest or basic unit of classification is