List of practice Questions

What will be the half-life period of a first order reaction with rate constant $k=5.5 \times 10^{-14} s^{-1}$ ?

Double fertilization is an event unique to

Fern gametophyte is generally

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

Gymnosperms bear seeds but lack fruits because they lack

In Spirogyra lateral conjugation takes place in the cells of

Isomorphic alternation of generations is found in

Laminarin and mannitol are the reserve food of

Meiosis in Dryopteris takes place during

Mosses and ferns are found in moist and shady places because both

Smooth and pegged rhizoids are present in the gametophytes of .

The botanical name of jute is

Turpentine oil is derived from

Which of the following is a character of gymnospermous wood ?

Which of the following statements is/are incorrect regarding bryophytes ?

Which one is Peat Moss ?

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

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

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

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

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

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

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

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.

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