List of top Chemistry Questions on General Chemistry asked in UP Board XII

The resistance of a column formed by a \(0.10\ \mathrm{mol\ L^{-1}}\) concentrated solution is \(6.5\times10^{3}\ \Omega\). Its diameter is \(1\ \text{cm}\) and length is \(50\ \text{cm}\). Calculate its resistivity, conductivity and molar conductivity.
Calculate molality of a solution of 5.0 g of ethanoic acid (\(CH_3COOH\)) in 150.0 g of benzene.
What is elevation of boiling point? A liquid has boiling point 353.23 K. The boiling point of solution becomes 354.11 K after dissolving 1.8 g non-volatile solute of molar mass 58 g mol$^{-1}$ to 90 g liquid. Calculate boiling point elevation constant for the liquid.
The colour of dilute solutions of [Fe(CN)$_6$]$^{4-}$ and [Fe(H$_2$O)$_6$]$^{2+}$ are different. Explain.
Gabriel-Pthalimide synthesis is given priority in the synthesis of primary amines.
Write the structure of the product for the reaction:
\[ \text{C}_6\text{H}_5\text{COOH} + \text{CH}_3\text{CH}_2\text{NH}_2 \xrightarrow{\text{H}^+} \text{C}_6\text{H}_5\text{CH}_2\text{NH}_2 \]
Write the structure of the product for the reaction:
\[ \text{CH}_3\text{C} \equiv \text{CH} \xrightarrow{\text{Hg}^{2+}, \text{H}_2\text{SO}_4} \text{CH}_3\text{C}(\text{OH})\text{CH}_3 \]
Write the structure of the product for the reaction:
\[ \text{C}_6\text{H}_6 + \text{C}_2\text{H}_5\text{Cl} \xrightarrow{\text{Anhydrous AlCl}_3} \text{C}_6\text{H}_5\text{C}_2\text{H}_5 \]
Write IUPAC name of the following complexes:
Write important structural and functional differences between DNA and RNA.
Explain Kohlrausch Law. Limiting molar conductances (\( \lambda^0 \)) of \( \text{Ca}^{2+} \) and \( \text{Cl}^- \) ions in water at 298 K are 119.0 S cm\(^2\) mol\(^{-1}\) and 76.3 S cm\(^2\) mol\(^{-1}\) respectively. Calculate \( \lambda^0_m \) of \( \text{CaCl}_2 \).
Why do the conductivity of a solution decreases with dilution? Explain with reason.
Transition metals generally form coloured compounds.
Give the name of two water-soluble vitamins and diseases due to deficiency of them.
Explain Raoult's Law. The vapour pressure of chloroform (\( \text{CHCl}_3 \)) and dichloromethane (\( \text{CH}_2\text{Cl}_2 \)) are 200 mm Hg and 4.5 mm Hg respectively at 298 K. Calculate the vapour pressure of the solution formed by mixing 51 g of \( \text{CHCl}_3 \) and 20 g of \( \text{CH}_2\text{Cl}_2 \) at 298 K.
Alcohols are more soluble in water in comparison to hydrocarbons of comparable molecular weight. Explain.
Sweetest sugar is:
Why is there always a decreasing tendency of solubility of gases in liquid on rising temperature?
Describe the method of identification of primary, secondary and tertiary amines. Write the chemical equations of these reactions also.
The boiling points of amines are lower than their comparable alcohols and carboxylic acids. Explain.
Give an example of such solid solution in which solute is gas.
Magnetic moment of a bivalent ion in aqueous solution will be, if its atomic number is 25:
Explain the following terms: (i) Zwitter ion
(ii) Peptide bond
(iii) Primary structure of protein
(iv) Polysaccharides
Explain in brief the Faraday's laws of Electrolysis. CuSO$_4$ solution was electrolysed for 20 minutes with 2.0 ampere current. What will be the mass of precipitated copper at cathode?
Boiling point of propanol is greater than butane. Explain.