The major organic product in the reaction is

CH₃ $$-$$ O $$-$$ CH(CH₃)₂ + HI $$ \to $$ products

A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a racemic mixture of $$\alpha $$-hydrixy acid. The carbonyl compound is

Nucleophilic addition reaction will be most favoured in

A transistor-oscillator using a resonant circuit with an inductor L (of negligible resistance) and a capacitor C in series produce oscillations of frequency $$f$$. If L is doubled and C is changed to 4C, the frequency will be