Which of he following statement is//are true. (1) The reaction of methyl magnesium bromide with acetone followed by hdrolysis gives secondary also (2) Aldehydes are more reactive than ketones. (3) The yield of ketone, when a secondary alcohol is oxidised, is more than the yield of aldehyde when primary alcohol is oxidised by K_(2)Cr_(2)O_(7)//H^(o+) (4) Both aldehydes and ketones reduce Tollen's reagent.
