ہوم / مشق / بارہویں جماعت / کیمیا / الکوحل اور فینول
5 سوالات: بارہویں جماعت کیمیا، جوابات اور وضاحت کے ساتھ۔
جوابی کنجی کے ساتھ قابلِ پرنٹ ورک شیٹ
Oxidation of a primary alcohol with acidified dichromate gives first:
درست جواب: An aldehyde
Primary alcohols give aldehydes and then carboxylic acids.
Oxidation of a secondary alcohol gives a:
Phenol is:
درست جواب: Weakly acidic
Phenol is a weak acid, stronger than alcohols.
Ethanol and ethanoic acid react in the presence of an acid catalyst to form:
Methanol is poisonous because it is metabolised to:
درست جواب: Methanal and methanoic acid
These products damage the optic nerve and other tissues.