List of top Chemistry Questions

Evaluate the correctness of the given statements.
Number of deactivating groups among: \( -Cl, -SO_3H, -OH, -NHC_2H_5, -COOCH_3, -CH_3 \)
What are \( X \) and \( Y \) respectively in the following reaction sequence? \begin{center} \includegraphics[]{139.png} \end{center}
What is the boiling point (in K) of the urea solution from the given graph?
Consider the following standard electrode potentials (\(E^\circ\) in volts) in aqueous solution: \includegraphics[]{135.png} Based on this data, which of the following statements is correct?
The number of extensive properties in the following list is: Enthalpy, density, volume, internal energy, temperature.
The values of \( a \) and \( b \) in the solubility product equation for barium phosphate are:
The equilibrium constant for the dissociation of HI at 773 K is:
Which one of the following statements is NOT correct about the compounds of alkaline earth metals?
Hydrated sodium aluminum silicate is called:
Which of the allotropic forms of carbon is aromatic in nature?
At \( T(K) \), the \( P, V \) and \( u_{{rms}} \) of 1 mole of an ideal gas were measured. The following graph is obtained. What is its slope (\( m \))? (x-axis = \( PV \); y-axis = \( u_{{rms}}^2 \); \( M \) = Molar mass) \includegraphics[]{126.png}
Identify the correct equation relating \( \Delta H \), \( \Delta U \), and \( \Delta T \) for 1 mole of an ideal gas (R = gas constant):
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}
A flask contains 98 mg of H₂SO₄. If \( 3.01 \times 10^{20} \) molecules of H₂SO₄ are removed from the flask, the number of moles of H₂SO₄ remaining in the flask is (\( N = 6.02 \times 10^{23} \)):
The correct order of covalent bond character of \( BCl_3, CCl_4, BeCl_2, LiCl \) is:
The correct order of atomic radii of N, F, Al, Si is:
In which of the following pairs, both molecules possess dipole moment?
The difference in radii between fourth and third Bohr orbits of \( He^+ \) (in m) is:
If \( \lambda_0 \) and \( \lambda \) are respectively the threshold wavelength and wavelength of incident light, the velocity of photoelectrons ejected from the metal surface is:
The major product(P) in the following reaction is
Reaction

What are X and Y respectively in the following reactions? 

Which of the following sequence of reagents convert propene to 1-chloropropane?

What are A and B in the following reaction sequence? 

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?