Question

The pesticides that are used in the preparation of herbarium is
(a) 2,4-dichloro phenoxy acetic acid
(b) Naphthyl acetic acid(NAA)
(c) Mercuric chloride
(d) Carbon disulphide

Answer 1

Herbarium is a type of taxonomic aid in which studies take place in both lab and fields. This helps in the identification of species.
Fungicide like mercuric chloride and pesticides like DDT, naphthalene and other chemicals helps check the growth of fungi and other pests.

Complete answer:
A herbarium consists of a collection of plant specimens that are dried, pressed and arranged in that way that it is accepted everywhere. The herbaria get prepared by the first collection of specimens and information like area, habitat, season and time of collection get recorded. After specimen collection, the specimen is put for drying inside the fold of newspaper which gets changed after the regular interval to avoid fungal growth. After pasting the herbarium on herbarium sheets the specimen gets sprayed with fungicides like mercuric chloride and pesticides like DDT, naphthalene and carbon disulphide. At last, labelling is done with the botanical name, family name, locality, date of collection, name of collector and habits and habitats. The storage of herbarium is done inside the metallic cupboard, which gets disinfected and also kept dried. The information regarding the collected specimen is published in the form of a book which is known as flora. It describes the presence of plants in different places.

So, the correct answer is 'Carbon disulphide'.

Note:
The largest herbarium in the world is the Royal Botanical garden in England. In India, the largest herbarium is the central national herbarium at Kolkata and the other famous herbarium lies in Dehradun and Lucknow, which is a forest research institute and national botanical research institute.