List of top Chemistry Questions

Identify the basic oxide from the following

Which of the following structure of proteins represents its constitution?

The Tyndall effect is observed only when the following conditions are satisfied:

(A) The diameter of the dispersed particle is much smaller than the wavelength of the light used.
(B) The diameter of the dispersed particle is not much smaller than the wavelength of the light used.
(C) The refractive indices of the dispersed phase and the dispersion medium differ greatly in magnitude.
(D) The refractive indices of the dispersed phase and the dispersion medium are almost similar in magnitude.

Identify the non-biodegradable wastes from the following:

[I.] Thermal power plants which produce fly ash

[II.] Wastes generated by cotton mills

[III.] Wastes produced by food processing units

[IV.] Slag produced from blast furnace

What is Z in the following set of reactions?

The RMS velocity ($v_{{rms}}$) of one mole of an ideal gas was measured at different temperatures and the following graph is obtained. What is the slope (m) of the straight line?

Observe the following set of reactions:

Correct statement regarding Y and B is:

Identify the correct statement from the following:
UK 'copper' coins are Cu/Ni alloy. AgBr has special light-sensitive properties. Ti$^{2+}$, V$^{2+}$, Cr$^{2+}$ are strong oxidising agents. The magnetic moment of V$^{2+}$ is 2.84 BM.

Aqueous CuSO₄ solution was electrolysed by passing 2 amp of current for 10 min. What is the weight (in g) of copper deposited at cathode? (Cu = 63 u; F = 96500 C mol^-1)

Three layers of liquid are flowing over a fixed solid surface as shown below. The correct order of velocity of liquid in these layers is: \includegraphics[]{127.png}

Which of the following is incorrectly matched?

What is $R_f$ of B in the following reaction?

What is the radius of the second Bohr orbit of $ {He}^+ $ ion?

Identify the anomers from the following.

What are X and Y respectively in the following set of reactions?

What are X and Y respectively in the following reaction sequence?

Which of the following is an essential amino acid?

‘A’ is a protecting colloid. The following data is obtained for preventing the coagulation of 10 mL of gold sol to which 1 mL of 10% NaCl is added. What is the gold number of ‘A’?

In the extraction of iron, the reaction which occurs at 900-1500 K in blast furnace is

The volume of an ideal gas contracts from 10.0 L to 2.0 L under an applied pressure of 2.0 atm. During contraction, the system also evolved 90 J of heat. The change in internal energy (in J) involved in the system is (1 L·atm = 101.3 J):

In Kjeldahl's method of estimation of nitrogen, the ammonia evolved from 0.2 g of an organic compound was absorbed in 60 mL of 0.1 M $H_2SO_4$. If 40 mL of 0.1 M NaOH is required for complete neutralisation of the unused acid, the percentage of nitrogen in the compound is:

The total number of products formed in the following reactions:
LiNO$_3$ $\xrightarrow{\Delta}$ Products NaNO$_3$ $\xrightarrow{\Delta}$ Products Be(NO$_3$)$_2$ $\xrightarrow{\Delta}$ Products

For the reaction: $A_2(g) \rightleftharpoons B_2(g)$

The equilibrium constant $K_c$ is given as 99.0. In a 1 L closed flask, two moles of $B_2(g)$ is heated to $T(K)$. What is the concentration of $B_2(g)$ (in mol L$^{-1}$) at equilibrium?

Styrene on reaction with reagent X gave Y, which on hydrolysis followed by oxidation gave Z. Z gives positive 2,4-DNP test but does not give iodoform test. What are X and Z respectively?

At $T$K, for one mole of an ideal gas, $P$, $V$ and ${v}_{rms}$ were measured. A graph of $({v}_{rms})^2$ (on y-axis) and $PV$ (on x-axis) goes straight line passing through origin. Its slope is $m$. What is its molar mass (in kg mol$^{-1}$)?