List of practice Questions

Fern gametophyte is generally

Gymnosperms bear seeds but lack fruits because they lack

In Spirogyra lateral conjugation takes place in the cells of

Smooth and pegged rhizoids are present in the gametophytes of .

Which of the following is a character of gymnospermous wood ?

Which one is Peat Moss ?

Isomorphic alternation of generations is found in

Turpentine oil is derived from

Double fertilization is an event unique to

Gametophyte and sporophyte are independent of each other in which of the following groups?

During the conversion of $NH _{2} OH \rightarrow N _{2} O$, the equivalent weight of $NH _{2} OH$ (mol. wt. of $NH _{2} OH$ is $M$ ) is

Which of the following has smallest number of molecules ?

The molarity of a $NaOH$ solution by dissolving $4 \,g$ of it in $250\, ml$ water is

In the reaction of sodium thiosulphate with $I_2$ in aqueous medium, the equivalent weight of sodium thiosulphate is equal to

In a titration, 25 $cm^3$ of 0.1 N oxalic acid solution requires 20 $cm^3$ of sodium hydroxide for complete neutralization. The mass of sodium hydroxide in 250 $cm^3$ solution is

Dulong and Petit's law (At. mass $\times$ Specific heat = 6.4) is valid only for

S.I. unit of atomic mass and molecular mass is kilograms. Atomic mass is equal to the mass of $6.023 \times 10^{24}$ atoms.

Number of atoms present in $4.25 \,g$ of $NH_3 $ is

If $1 \,mL$ of water contains $20$ drops then number of molecules in a drop of water is

In an experiment, $4 \,g$ of $ M_{2}O_{x} $ oxide was reduced to $2.8 \,g$ of the metal. If the atomic mass of the metal is $ 56\,g\,mol^{-1}, $ the number of $O$ atoms in the oxide is

The total number of atoms of all elements present in $ 1 $ mole of ammonium dichromate is

To dissolve 0.9 g metal, 100 mL of 1 N HCl is used. What is the equivalent weight of metal?

Under the action of a given coulombic force the acceleration of an electron is $2.5 \times 10^{22}\, m \,s^{-2}$. Then the magnitude of the acceleration of a proton under the action of same force is nearly

An electron initially at rest falls a distance of $1.5\, cm$ in a uniform electric field of magnitude $2 \times 10^4\, N/C$. The time taken by the electron to fall this distance is

Charge $Q$ is distributed over a ring, then the force on charge $q$ placed at the centre of the ring will be