List of practice Questions

$ N _{2}+3 H _{2} \rightleftharpoons 2 NH _{3} $ The equilibrium constant for the reaction is $K$, then the equilibrium constant or the equilibrium for the reaction given beloow is: $ NH _{3} \rightleftharpoons \frac{1}{2} N _{2}+\frac{3}{2} H _{2} $

The equation of state of some gases can be expressed as $\left(P+\frac{a}{V^{2}}\right)\left(V-b\right)=RT$, where $P$ is the pressure, $V$ is the volume, $T$ is the absolute temperature and $a, b$ and $R$ are constants. The dimensions of $a$ are

The camel?? hump is composed of a tissue, which provides water when oxidised, is called

Sodium phenoxide reacts with $CO_2$ at 400 K and 4.7 atm pressure to give

Riboflavin is:

Plants which can withstand wide range of temperature tolerance are called

Photoperiodism is associated with the formation of:

Pellagra disease is caused by the deficiency of

Mycorrhiza is correctly described as

In the reaction sequence: $ {CaC2 ->[H_2O] A}$$ { ->[{\text{dil}} HgSO_4][HgSO_4] }$$ {B ->[H_2/Ni] C}$, the term ????is

In the reaction: $2P_{2}O_{5}+2HNO_{3}\to P_{4}O_{10}+x,$ the term $x$ is

In mammals, the digestion of starch starts from

In general, the wavelength of microwaves, is

If active mass of a $6\%$ solution of a compound is $2$, its molecular weight will be

Hydrolysis of beryllium carbide produces

How many teeth grow only once in the life of a man?

Gun metal is an alloy of copper and tin with:

Critical temperature can be defined as the temperature

Which of the following sets represents all endodermal structures?

Conjoint, collateral, endarch and open vascular bundles are found in:

Calorimeters are made of which of the following?

Bismuth chloride $(BiCl_3)$, on hydrolysis, yields a white precipitate of

Nitrogen is unreactive at room temperature but becomes reactive at elevated temperatures (on heating) or in the presence of catalysts. In nitrogen molecules, there is extensive delocalization of electrons.

In crystal lattice, size of the cation is larger in a tetrahedral hole than in an octahedral hole. The cations occupy more space than anions in crystal packing.

Electrons are ejected from a certain metal when either blue or violet light strikes the metal surface. However, only violet light causes electron ejection from a second metal. The electrons in the first metal require less energy for ejection.