Tiêu đề 1.Carbonyl Compounds (A _ R).pdf ✅

CHEMISTRY The following questions given below consist of an "Assertion" (A) and "Reason" (R) Type questions. Use the following Key to choose the appropriate answer. (A) If both (A) and (R) are true, and (R) is the correct explanation of (A). (B) If both (A) and (R) are true but (R) is not the correct explanation of (A). (C) If (A) is true but (R) is false. (D) If (A) is false but (R) is true. Q. 1 Assertion: Bakelite is a phenol-formaldehyde resin formed from the base catalysed reaction. Reason :.Basic nature increases the electrophicity of HCHO [C] Q.2 Observe the following reaction O KMnO4/H2SO4 P NaOH/CaO/ Q + CaCO3 Assertion : Molecular mass of Q is 58 g/mol. Reason : Boiling point of P is greater than Q. [B] 21 May 2009 Thursday _________________________ Q.3 Assertion : Acetaldehyde undergoes aldol condensation instead of hydrate formation in the presence of OH– /H2O. Reason : Enolate of aldehyde is better nucleophile than OH– . [A] Sol. CH2=CH | O – CH2–CH || O (better nucleophile)