Why is Octopus grouped in Cephalopoda?

Explain why is OH group in phenols more strongly held as compared to OH group in alcohols ?

Explain why is OH group in phenols more strongly held as compared to OH group in alcohols ?

Why is +l-effect of t-butyl group greater than that of isopropyl group?

Why is blood group identification not required for transfusing serum?

Why is NH_(2) group of aniline acetylated before carrying our nitration

Match and choose the correct pair {:((a),"Cephalopoda "-,"Closed circulatory "-, "Pinctada"),((b),"Echinoidea "-, "Aristotle's lantern "-,"Sea Urchin"),((c),"Tentaculat "-,"Cnodolasts "-,"Pleurobrachia"),((d),"Hexactinellida "-,"Siliceous spicules "-,"Venus flower basket"-):}

Why do we group data?

In qualitative analysis. Explain why The cations of group II are precipitated , in acidic medium while those of group IV in alkaline medium.

Why beryllium is different from other members of its group in some properties?

Why is -CH_(3) group ortho and para directing in toluene ?