Which of the following weeds has been found useful to check water pollution caused by industrial affluents?
Parthenium
Elephant grass
Water hyacinth
(a) and (b)
C.
Water hyacinth
Which one of the following is obtained as slag in a blast furnace?
Calcium Carbonate
Calcium Sulphate
Calcium Chloride
Calcium Silicate
In which year the Chernobyl Nuclear Power Plant of the former USSR had accident that caused escape of radio nuclides into atmosphere?
1979
1980
1984
1986
Which one is regarded as World heritage forest?
Nandan Kanan in Odisha
Kaziranga in Asom
Sunderbans in Paschim Banga
Indian Botanical Garden, Shibpur in Paschim Banga
Certain desert lizard excrete their wastes in dry form. This serves as a means of
protective mechanism against their predators
limiting factor of the organism
adaptation of the organization to the environment
countering the problem of food scarcity
In the industrial production of vegetable ghee, the process involved is
dissociation
reduction
oxidation
ionization
What is the name of the network topology in which there are bi-directional links between each possible node?
Ring
Star
Tree
Mesh
Dry Ice is nothing but
gaseous carbon dioxide
washing soda
solid carbon dioxide
carbon monoxide
When H2 gas is allowed to expand from a region of high pressure to a region of low pressure the temperature of the gas
decrease to a small extent
increases
does not change
decreases suddenly