List of practice Questions

When propionic acid is treated with aqueous sodium bicarbonate, $ CO_{2}$ is liberated. The $C$ of $ CO_{2}$ comes from

When sucrose is heated with conc. $ HNO_{3},$ the product formed is

When a stationary wave is formed then its frequency is

Lithium metal crystallizes in a body centred cubic crystal. If the length of the side of the unit cell of lithium is $351\, pm,$ the atomic radius of the lithium will be

In a pure inductive circuit, current

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

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

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

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

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

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

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

Which one of the following is not air pollutant ?

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.

$DDT$ 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 $= 330 \,ms^{-1}$).