List of practice Questions

The necessary condition for an interference by two sources of light is that

The magnifying power of a compound microscope increase with

The length of the seconds pendulum is decreased by $0.3\, cm$ when it is shifted to Chennai from London. If the acceleration due to gravity at London is $ 981\,cm/{{s}^{2}}, $ the acceleration due to gravity at Chennai is (assume $ {{n}^{2}}=10 $ )

The length of a given cylindrical wire is increased by 100%. Due to the consequent decrease in diameter the change in the resistance of the wire will be

The ionic mobility of alkali metal ions in aqueous solution is maximum for :

The integrated rate equation is $ kt=\log \,C_{0}-\log C_{t} $ . The straight line graph is obtained by plotting

The functional groups present in salol are

The flame colours of metal ions are due to

The excretory material of marine bony fish is

The electric flux through a closed surface area $S$ enclosing charge $Q$ is $ \phi $ . If the surface area is doubled, then the flux is

pH of $ HCl $ (conc. $ 0.1 \, mol/L $ ) is one. Compute the pH of $0.05\, mol/L$ solution of $ H_{2}SO_{4} $ .

What is the $pH$ at equivalence point in the titration of $0.1 \,M \,CH _{3} COOH$ and $0.1 \,M \,NaOH ?\left( K _{a}\right.$ for acetic acid is $1.8 \times 10^{-5}$ )

A basic buffer solution is formed by selecting the pair

For the reaction, $ C(s)+CO_{2}(g)2CO(g) $ the partial pressure of $ CO_{2} $ and $ CO $ are $2.0$ and $4.0$ arm respectively then equilibrium $ K_{p} $ for the reaction will be

Solubility of $ AgCl $ will be minimum in

The dipole moment of HBr is $1.6 \times 10^{-30} $C-m and interatomic spacing is $1 \mathring{A}$. The per cent ionic character of HBr is

$ HCl $ is completely neutralised by $ NaOH $ solution. The resulting solution contains the following species

The coordinates of a moving particle at any time t are given by $ x=\alpha {{t}^{3}} $ and $ y={{t}^{3}}. $ The speed of the particle at time t is given by

The compounds formed at anode in the electrolysis of an aqueous solution of potassium acetate are

tert-butyl methyl ether on heating with anhydrous $HI$ in ether gives

Scala Naturae was written by

Royal jelly is secreted from

Resonant frequency of a series LCR circuit is 600 Hz. Quality factor of the circuit is 4. Band width is

Replum is present in the ovary of flower of

Which of the following represents total kineticenergy of one mole of the gas