what are strong bulky bases ? is NaNH2 AND liq. NH3 is bulky base

Q. Heavy and bulky goods are transported by

Q. bulky : streamlined :: ______ : neat

Q. In a base-catalyzed elimination reaction, the base takes away a proton from the $\beta$ position of the leaving group (the group that goes away with the bonding pair of electrons) and a double bond is formed. When the base is bulky it prefers to take away the proton from the less hindered position.
In the above process, $Y$ and $Z$ are:

Q. Cement industries are located close to sources of their raw material, since the material involved is usually heavy and bulky.

Q. ___________ manures are refuses of plants and animals which are bulky in nature and supply nutrients in small quantities, and organic matter in large quantities.