List of practice Questions

For a any reversible reaction. If increases concentration of reactants. Then effect on equilibrium constant:

Correct relation b/w dissociation constant's of a di-basic acid:

Who evaluated the mass of electron indirectly with help of charge:

The activation energy for a reaction is 9.0 kcal/mol. The increase in the rate constant when its temperature is increased from 298 K to 308 K is:

A person who is eating boiled potato, his food contains the component

Living beings maintain continuity of life by:

The plates of a parallel plate capacitor of capacity 50 $ \mu F $ are charged to a potential of 100 volts and then separated from each other so that the distance between them is doubled. How much is the energy spent in doing so?

A compound contains atoms of three elements $A, B$ and $C$. If the oxidation number of $A$ is $+ 2, B$ is $+5$ and that of $C$ is $- 2$, the possible formula of the compound is

A mass is performing vertical circular motion (see figure). The average velocity of the particle is increased, then at which point the string will break :

n identical mercury droplets charged to the same potential $V$ coalesce to form a single bigger drop. The potential of new drop will be

Which of the following is a characteristic temperature for the thermocouple?

The chief component of cement is:

$\tan^{-1}\frac{1}{3}+\tan^{-1}\frac{1}{7}+\tan^{-1}\frac{1}{18}+.........+\tan^{-1}\left(\frac{1}{n^2+n+1}\right)+....to\infty$ is equal to

Cell reaction is spontaneous when

Dihedral angle in staggered form of ethane is :

If $p \Rightarrow (q \vee r)$ is false, then the truth values of $p, q, r$ are respectively

Which factor is responsible for inhibition of enzymatic process during feedback:

What is the work of copper T ?

A compound formed by elements $A$ and $B$ crystallises in the cubic structure, where $A$ atoms are present at the corners of a cube and $B$ atoms are present at the face centres. The formula of the compound is

$F_2C = CF_2$ is a monomer of

For the reaction ${H^+ + BrO_3 ^- + 3Br^- -> 5Br+2 + H_2O}$ which of the following relation correctly represents the consumption & formation of reactants and products :

Which aquatic fern is used to increase the yield in paddy crop?

Characteristic of simple epithelium is: