Assertion : In a mixture of Cd(II) and Cu(II),Cd²⁺ gets precipitated in presence of KCN by H₂S.

Reason : The stability constant of [Cu(CN)₄]^3- is greater than [Cd(CN)₄]^2-.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

42.

Assertion : The presence of a large number of Schottky defects in NaCl lowers its density.

Reason : In NaCl, there are approximately 10⁶ Schottky pairs per cm³ at room temperature. 

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false.

• If both assertion and reason are false.

Assertion : Magnesium is extracted by the electrolysis of fused mixture of MgCl₂, NaCl and CaCl₂.

Reason : Calcium chloride acts as a reducing agent.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Which of the following is a non-reducing sugar?

• Sucrose

• Maltose

• Lactose

• Mannose

Which of the following reaction will not produce ethylene glycol?

• 

• ClCH₂CH₂Cl $\underset{\mathrm{heat}}{\overset{{\mathrm{OH}}^{-}}{\to }}$

• HO-CH₂-CH₂-OCH₃ $\underset{\mathrm{heat}}{\overset{{\mathrm{OH}}^{-}}{\to }}$

• CH₂ = CH₂ $\underset{{\mathrm{KMnO}}_4}{\overset{\mathrm{alkaline}}{\to }}$

Salicylic acid can be easily prepared by reaction between

• phenol and CO₂

• benzoic acid and H₂O₂

• benzene diazonium chloride and CO₂

• phenol and formic acid.

Reaction of aniline with HNO₂ followed by treatment of dilute acid gives

• C₆H₅NHOH

• C₆H₅OH

• C₆H₅NHNH₂

• C₆H₆