List of practice Questions

Which of the following statement is true?

Consider a parallel plate capacitor of $10\,\mu F$ (micro-farad) with air filled in the gap between the plates. Now one-half of the space between the plates is filled with a dielectric of dielectric constant $4$, as shown in the figure. The capacity of the capacitor changes to

Which of the following molecules is expected to rotate the plane of plane-polarized light?

The lactic acid shows the geometrical isomerism. Lactic acid has carbon-carbon double bond.

Which is purified by steam distillation?

Permanent magnet has properties retentivity and coercivity respectively

At $25^{\circ} C$, the dissociation constant of a base, $BOH$, is $1.0 \times 10^{-12}$. The concentration of hydroxyl ions in $0.01\, M$ aqueous solution of the base would be

Equilibrium constants $ K_{1}$ and $ K_{2} $ for the following equilibria

$H_{2}S $ gas when passed through a solution of cations containing $ HCl $ precipitates the cations of second group of qualitative analysis but not those belonging to the fourth group. It is because:

According to Lowry and Bronsted, the strength of an acid depends upon

Calculate the pH of a solution in which hydrogen ion concentration is $0.005\, g$-equi/$L$?

The solubility product of $ BaC{{l}_{2}} $ is $ 4\times {{10}^{-9}}. $ Its solubility in mol/L is

For the reaction, $H _{2}+ I _{2} \rightleftharpoons 2 HI$, the equilibrium concentration of $H _{2}, I _{2}$ and $HI$ are $8.0, 3.0$ and $28.0 \,mol / L$ respectively. The equilibrium constant is

Reaction $BaO _{2}( s ) \rightleftharpoons BaO ( s )+ O _{2}(g)$ . In equilibrium condition, pressure of $O_{2}$ depends on

Solubility of $M X_{2}$-type electrolytes is $0.5 \times 10^{-4}$ $mol / L$ Then find out $K_{s p}$ of electrolytes

Which has highest pH?

Solution of $0.1\, N\, NH _{4} OH$ and $0.1\, N\, NH _{4} Cl$ has $pH 9.25$, then find out $pK _{ b }$ of $NH _{4} OH$.

The $pK_a$ of a weak acid (HA) is 4.5. The pOH of an aqueous buffered solution of HA in which $50\%$ of the acid is ionized is

Mixture of $CH_3COOH$ and $CH_3COONH_4$ is an example of acidic buffer. Acidic buffer contains equimolar mixture of weak acid and its salt with weak base.

When hydrogen molecules decomposed into its atoms which conditions gives maximum yields of $ H $ atoms?

In a sautrated solution of the sparingly soluble strong electrolyte $AgIO_3$ (Molecular mass $= 283$) the equilibrium which sets in is $ {AgIO_{3(s)}<=>Ag^+_{(aq)} +IO^{-}_{3(aq)}}$ If the solubility product constant $K_{sp}$ of $AgIO_3$ at a given temperature is $1.0 ??10^{-8}$, what is the mass of $AgIO_3$ contained in $100\, ml$ of its saturated solution?

A frictionless track $A B C D E$ ends in a circular loop of radius $R. A$ body slides down the track from point $A$ which is at a height $h = 5 \,cm$ . Maximum value of $R$ for the body to successfully complete the loop is

The angle for which maximum height and horizontal range are same for a projectile is

Figure shows four paths for a kicked football. Ignoring the effects of air on the flight, rank the paths according to initial horizontal velocity component, highest first

Synaptic vesicle is found in