(i) Whether Raj would be held responsible?
In the instant case, Raj is the manufacturer. As a manufacturer of talcum powder, there is an implied condition that the product is fit for human skin usage. Since the powder contained a chemical residue that caused skin irritation, it was not of merchantable quality, meaning it was not fit for its ordinary purpose (application to the body).
Raj, the manufacturer of the talcum powder, is responsible for the skin irritation of Vikas. Raj cannot deny liability based on the buyer's selection because the product was not of "merchantable quality," which is an implied condition in sale of goods. Vikas can claim damages from Raj for the skin irritation caused by the defective talcum powder.
Even if Raj is merely a trader selling a popular brand in a sealed container, the goods must still be merchantable (i.e., fit for use). A product that causes skin irritation due to chemical residue is not of merchantable quality. The seller is liable for latent defects in the goods even if they are sold in a sealed container, as the seller is expected to sell goods that are fit for consumption/use.
Raj is still responsible for selling goods of unmerchantable quality, even if he is just a trader.
Alternate Answer (ii)
Here, the buyer is relying on the particular brand name. However, when goods are sold in a sealed container of a reputed brand, the trader does not manufacture the goods and has no control over the contents.
Here, Raj is only a trader, not a manufacturer. So, the manufacturer is responsible and not Raj.