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Compound $(C)$ is

Which of the following are oxidised by $NaOCl$ ?
$I. RCH(OH)CH_3$
$II. RCH_2CH_2-CO-CH_2CH_3$
$III. R-COCH_3$
$IV. CH_3CHO$
$V. (CH_3)_2C=C(CH_3)COCH_3$

Find the major product of the following reaction:
$Ph-CHO + CH_3-CHO \xrightarrow[\Delta]{Ca(OH)_2}$ Major product

Ketone reacts with $NH_2OH$ to give oxime. The reaction is as follows:
$R_2C=O + H_2N-OH \rightarrow R_2C=N-OH + H_2O$
The total number of organic products (ketoxime) formed when the simplest ketone and its next higher homologue react with $NH_2OH$,is:

Methyl ketone group is identified by