NEET (UG) entrance exam Question Bank Solutions for Chemistry

In Duma's method for estimation of nitrogen 0.3 g of an organic compound gave 50 mL of nitrogen collected at 300 K temperature and 715 mm pressure. Calculate the % composition of nitrogen in the compound: (Aqueous tension at 300 k = 15 mm)

Peptide linkage is:

The molar conductance of NaCl, HCl and CH₃COONa at infinite dilution are 126.45, 426.16 and 91.0 S cm² mol⁻¹ respectively. The molar conductance of CH₃COOH at infinite dilution is ______.

Choose the right option for your answer.

The following solutions were prepared by dissolving 10 g of glucose (C₆H₁₂O₆) in 250 ml of water (P₁), 10 g of urea (CH₄N₂O) in 250 ml of water (P₂) and 10 g of sucrose (C₁₂H₂₂O₁₁) in 250 ml of water (P₃). The right option for the decreasing order of osmotic pressure of these solutions is

The molar conductivity of 0.007 M acetic acid is 20 S cm² mol⁻¹. What is the dissociation constant of acetic acid? Choose the correct option.

\[\begin{array}{cc}
\end{array}\]\[\begin{bmatrix}
\ce{\Lambda^{\circ}_{H^+} = 350 S cm^2 mol^{-1}}\\
\ce{\Lambda^{\circ}_{CH_3COO^-} = 50 S cm^2 mol^{-1}}
\end{bmatrix}\]

The major product of the following chemical reaction is:

\[\begin{array}{cc}
\ce{CH3}\phantom{.................................}\\
\backslash\phantom{...........................}\\
\phantom{............}\ce{CH - CH = CH2 + HBr ->[(C6H5CO)2O2]?}\\
/\phantom{...........................}\\
\ce{CH3}\phantom{.................................}\\
\end{array}\]

The molar conductance of NaCl, HCl, and CH₃COONa at infinite dilution are 126.45, 426.16, and 91.0 S cm² mol⁻¹ respectively. The molar conductance of CH₃COOH at infinite dilution is. Choose the right option for your answer.

Which of the following reactions is NOT correct according to the law of conservation of mass?

Phenols possess a dipole moment which is ______.

Phenoxide ion is more stable than phenol due to the ______.

Assertion: The most electronegative element in the periodic table is F.

Reason: Fluorine has the highest negative electron gain enthalpy.

Denaturing of proteins means ______.

Which of the following is WRONG about \[\ce{H2O2}\]?

Schottky defect is noticed in ______

The quantity of electricity needed to separately electrolyse 1 M solution of ZnSO₄, AlCl₃, and AgNO₃ completely is in the ratio of ______.

Fog is a colloidal solution of ______.

Which of the following is low-grade ore of copper?

Valence bond theory is based on the assumption that the bonds formed between the metal ions and ligands are ______

Predict the conditions for forward reaction on the basis of Le-Chatelier's principle.

\[\ce{2SO2(g) + O2(g) ⇌ 2SO3(g)}\]; ΔH = −198 kJ

Alkynes exhibit: