Identify the INCORRECT statement(s) among the | vedclass

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(C) Statement $(I)$ is $INCORRECT$: Ammonia reacts with anhydrous $CaCl_2$ to form an adduct $CaCl_2 \cdot 8NH_3$,so it cannot be used as a drying age

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$(I)$,$(III)$ & $(IV)$

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(C) Statement $(I)$ is $INCORRECT$: Ammonia reacts with anhydrous $CaCl_2$ to form an adduct $CaCl_2 \cdot 8NH_3$,so it cannot be used as a drying agent.Statement $(II)$ is $CORRECT$: Phosphine $(PH_3)$ is a much weaker base than ammonia $(NH_3)$ due to the larger size and lower electronegativity of the phosphorus atom,making the lone pair less available.Statement $(III)$ is $INCORRECT$: $R_3SiCl$ on hydrolysis produces $R_3SiOH$,which undergoes dimerization to form $R_3Si-O-SiR_3$ (a disiloxane). It does not form cross-linked polymers; only $R_2SiCl_2$ forms linear polymers and $RSiCl_3$ forms cross-linked polymers.Statement $(IV)$ is $INCORRECT$: When copper reacts with $6 \ M$ $HNO_3$ (dilute),the product is $NO$ (Nitric oxide),not $NO_2$. $NO_2$ is produced with concentrated $HNO_3$.Therefore,statements $(I)$,$(III)$,and $(IV)$ are incorrect.

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