List of practice Questions

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

A tube of length $L$ is filled completely with an incompressible liquid of mass $M$ and closed at both the ends. The tube is then rotated in a horizontal plane about one of its ends with a uniform angular velocity $\omega.$ The force exerted by the liquid at the other end is

Styrene can be purified by

Glauber salt is

Which motion does not require force to maintain it?

$ O_{2} $ dissociation curve is

Which one of the following pairs is not correctly matched?

Plexiglass is a commercial name of

A ball of mass $m$ elastically collides with a wall with velocity $v$, the $n$ change in its momentum is equal to

An engine pumps up $100\, kg$ of water through a height of $10 \,m$ in $5 \,s$ . Given that, the efficiency of engine is $60\%$ If $ g=10\,ms^{-2}$ the power of this engine is

Value of $x$ in potash alum, $K_2SO_4\cdot Al_x(SO_4)_3\cdot 24H_2O$ is

Two particles of mass $m$ each are tied at the ends of a light string of length $2a$. The whole system is kept on a frictionless horizontal surface with the string held tight so that each mass is at a distance $a$ from the centre $P$ (as shown in the figure). 

Now, the mid-point of the string is pulled vertically upwards with a small but constant force $F$. As a result, the particles move towards each other on the surface. The magnitude of acceleration, when the separation between them becomes $2x $ is

In the following reaction, The produce X is