List of practice Questions

Beilstein test is used for the estimation of which one of the following elements?

$C_{2}H_{2}$ molecule is

Dipole moment is shown by

How many cyclic structures are possible for $C_4H_6?$

Only $sp$ and $sp$ hybrid orbitals are involved in the formation of

If a magnet is suspended at an angle $ 30{}^\circ $ to the magnetic meridian, the dip needle makes angle of $ 45{}^\circ $ with the horizontal. The real dip is

Three long, straight parallel wires, carrying current, are arranged as shown in figure. The force experienced by a 25 cm length of wire C is

$5\, ml$ of $0.4\, N\, NaOH$ is mixed with $20\, ml$ of $0.1\, N\, HCl$. The $pH$ of the resulting solution will be

In chemical equilibrium, the value of $\Delta n$ is negative, then the relationship between $K_p$ and $K_c$ will be

For a diprotic acid, which of the following is true for first and second ionization constants? $ (K_{a_1} $ and $ K_{a_2} $ ).

In a reversible chemical reaction at equilibrium, if the concentration of any one of the reactants is doubled, then the equilibrium constant will

Which of the following will not function as a buffer solution? [a] $ NaCl $ and $ NaOH $ [b] $ NaOH $ and $ N{{H}_{4}}OH $ [c] $ C{{H}_{3}}COON{{H}_{4}} $ and $ HCl $ [d] Borax and boric acid

At equilibrium which is correct?

If $K_{sp}$ of $CaF_2$ at $25^??$ is $1.7 \times 10^{-10}$, the combination amongst the following which gives a precipitate of $CaF_2$ is

$\frac{K_{p}}{K_{c}}$ for following reaction will be $\quad\quad$$CO_{\left(g\right)}+\frac{1}{2}O_{2\left(g\right)}\rightarrow CO_{2\left(g\right)}$

On adding which of the following, the pH of $20\, ml$ of $0.1\, N\, HCl$ will not alter ?

The equilibrium constant $\left(K_{c}\right)$ for the reaction $N_{2}$$_{(g)}$ + $O_{2}$ $_{(g)} \to 2NO \left(g\right)$ at temperature T is $4 � 10^{-4}$. Thevalue of Kc for the reaction $NO$$_{(g)} \to \frac{1}{2} N_{2}$$_{(g)} + \frac{1}{2} O_{2}$$_{(g)}$ at the same temperature is :

Two cars of masses $m_1$ and $m_2$ are moving in circles of radii $r_1$ and $r_2$, respectively. Their speeds are such that they make complete circles in the same time $t$. The ratio of their centripetal acceleration is :

The horizontal range and the maximum height of a projectile are equal. The angle of projection of the projectile is

The horizontal range is four times the maximum height attained by a projectile. The angle of projection is

Inflorescence found in grasses and sedges is

Principal cereal crop of India is

The boiling point of water is exceptionally high because

In a normal adult human, the average cardiac output (stroke volume) is

Which of the following is soluble in yellow ammonium sulphide?