List of top Chemistry Questions

In a reaction $A+B\rightarrow P$ rate is doubled when [B] is doubled, and the rate increases by 8 when both [A] and [B] are doubled. The rate law is:

Which of the following conditions are correct? A. $\Delta H$ is +ve, $\Delta S$ is -ve at any T (non-spontaneous). B. $\Delta H$ is -ve, $\Delta S$ is -ve at low T (non-spontaneous). C. $\Delta H$ is +ve, $\Delta S$ is +ve at low T (spontaneous). D. $\Delta H$ is -ve, $\Delta S$ is +ve at any T (spontaneous).

A molecule XY (mol. wt $180~g~mol^{-1}$) undergoes second order association in water. If the van't Hoff factor 'i' of the substance is 0.88; the degree of association of the substance is:

Arrange the following in order of their decreasing ionic strength: A. 0.1 m NaCl, B. 0.01 m $K_{2}SO_{4}$, C. 0.001 m $AlCl_{3}$, D. 0.01 m glucose.}

Arrange the following gases in increasing order of their critical temperatures: A. $W (a=4.0, b=0.027)$, B. $X (a=8.0, b=0.030)$, C. $Y (a=6.0, b=0.032)$, D. $Z (a=12, b=0.027)$.

0.28 g of the following are dissolved in 1 L of water. Arrange them in increasing order of their molarities: A. Glucose ($C_{6}H_{12}O_{6}$), B. Urea ($NH_{2}CONH_{2}$), C. Benzoic Acid ($C_{6}H_{5}COOH$), D. Sucrose ($C_{12}H_{22}O_{11}$).

Consider the redox reaction $Mg_{(s)}+2~Ag_{(aq)}^{+}\rightarrow Mg_{(aq)}^{2+}+2~Ag_{(s)}$. The expression of cell emf at 298 K is:

pH of a 0.01 M $Ca(OH)_{2}$ solution is: (Given $log_{10} 2 = 0.3010$)}

Which of the following are correct with reference to Maxwells-Boltzmann distribution of velocities? A. The fraction of molecules with very low ($c\rightarrow0$) and very high ($c\rightarrow\infty$) velocities is very small. B. The area under different curve obtained at different temperature is same. C. The maximum of the curve represent average velocity at a particular temperature. D. The area under the curve represents total number of molecules.

The capillary action tendency of a liquid is a consequence of:

Which of the following is/are intensive property/ies? A. Volume, B. Density, C. Energy, D. Pressure, E. Molar heat Capacity

Which of the following equation is not correct?

What is the number of unit particles present in a Body-Centered Cubic (BCC) unit cell?

Which of the following reagents are used to prepare primary amines by Hofmann bromamide degradation reaction?

The relative lowering of vapour pressure produced by dissolving 18 g of urea (Molar mass = 60 g mol\(^{-1}\)) in 100 g of water is

100 g of a mixture of $NaOH$ and $Na_{2}SO_{4}$ is neutralized by 100 ml of 0.5M $H_{2}SO_{4}$. What is the amount of $Na_{2}SO_{4}$ present in the mixture?}

Metamerism can be exhibited by the compounds containing

The shapes of $BrF_{5}$ and $XeF_{4}$, respectively are}

Which of the following mixture form an ideal solution?

The number of radial nodes in 3s and 2p orbitals, respectively are

Which of the following does not exist?

Which of the following is not a periodic property?

A balloon filled with an air sample occupies 3 L volume at 35 °C. On lowering the temperature to T, the volume decreases to 2.5 L. The temperature T is [Assume P constant]

The order of the average bond length of the given bonds is

Which of the following expression correctly represents molar conductivity?