A compound contains atoms of three elements A, B and C, If the oxidation number of A is +2, B is +5 and that of C is -2, the possible formula of the compound is

The d-electron configuration of $Cr^{2+}, Mn^{2+} Fe^{2+} and Co^{2+} are d^4, d^5,d^6 and d^7$ drespectively. Which one of the following will exhibit minimum paramagnetic behaviour? (At. no. Cr = 24, Mn = 25, Fe = 26, CO = 27)

Which one is most reactive towards electrophilic reagent?

Taxonomically a species is ……….

Two plants can be conclusively said to belong to the same species if they …….

Find the correct statements for the following
A) The mission of museum is preserve cultuaral heritage
B) Ex-situ conservation had been done in Zoological Park
C) In-situ conservation had been done in Zoological Park
D) Breeding of extinct species

Where endangered animal species are kept for reproduction?

Unicellular eukaryotic microorganisms comprise ________ .

Example of blue green algae is in ________ .

Match the item in column I with column II and choose the option showing correctly mached pairs.