List of top Chemistry Questions

When sodium nitroprusside is added to sodium fusion extract the presence of sulphur is indicated by the formation of a violet colored complex. Its formula is
The molar enthalpy of vaporization of water at 1 bar and $100^\circ$C is 41 kJ mol$^{-1}$. What is the internal energy change when 1 mol of water is vaporized at 1 bar pressure and $100^\circ$C? Assume water vapor as a perfect gas. (R = 8.3 J K$^{-1}$ mol$^{-1}$)
For the gas phase homogeneous equilibrium:

\[ 2X(g) \rightleftharpoons 2Y(g) + Z(g) \]

$K_C$ at 400K is $1 \times 10^{-3}$ mol L-1. What is the value of $K_P$ for the equilibrium at 400K?

\[ R = 0.082 \, \text{L atm K}^{-1} \, \text{mol}^{-1} \]

When propanoic acid is treated with bromine and red phosphorus in aqueous medium, 2-bromopropanoic acid is formed. This reaction is known as
Octet rule is obeyed in
Which of the following molecules has two sigma ($\sigma$) and two pi ($\pi$) bonds?

The values of X, Y, and Z in the following chemical equation are respectively: 
\( S_8 + X HNO_3 ({conc.}) \rightarrow Y H_2SO_4 + X NO_2 + Z H_2O \)

Which of the following pairs of aquated first transition metal ions have the same color?
Conformational isomerism is not possible in
Which of the 3d block element has the minimum melting point?
The correct electronic configuration of Uranium (Z=92) is
Which of the following groups is deactivating ortho-para directing in aromatic electrophilic substitution?
Animal starch is

The following results were obtained in the gas phase reaction between nitric oxide and oxygen at a given temperature.

Which of the following is an example of pseudo first order reaction?
The valence electron MO configuration of \( {C}_2 \) (atomic number of C = 6) molecule is:
Which of the following is used as an insect attractant?
Which of the following is used as anode in mercury cell?
Which of the following is true for a reaction that is spontaneous only at high temperature?
The rate constant of a first order reaction is \(4.606 \times 10^{-3} \, {s}^{-1}\). The time taken to reduce 20 g of reactant into 2 g is:
The rate law for the reaction, A + B → Product, is: \[ {rate} = [A][B]^{3/2} \] The total order of the reaction is:
The major products formed when one mole of \( \text{CH}_3\text{CH}_2\text{CH}(\text{CH}_3)\text{CH}_2\text{OCH}_2\text{CH}_3 \) is treated with one mole of HI are:
The type of d-d transition of the electron occurs in \([Ti(H_2O)_6]^{3+}\) is:
The reaction, \( 2I^- + S_2O_8^{2-} \rightarrow I_2 + 2SO_4^{2-} \), is catalysed by:
The volume of ethanol required to prepare 3 L of 0.25 M aqueous solution is (density of ethanol = 0.36 kg L\(^{-1}\), molar mass = 60 g mol\(^{-1}\)):