Which of the following is not a covalent crystal ?
`(d iamond,grap hite,ca r b o rundum,ice)`

Which one of the following is a covalent crystal?

Which one of the following exists as covalent crystals in the solid state?

Which of the following is not a molecular crystal ? ( I_2 , P_4 , Solid CO_2 , ice, brass)

Which of the following is not an invasive alien species in the Indian context? (a) Lantana (b) Cynodon (c) Parthenium (d) Eichhornia

Which of the following is not a features of biodiversity hotspots? (a) Large number of species (b) Abundance of endemic species (c) Mostly located in the polar regions (d) Mostly located in the tropics

Which of the following is not a cause for loss of biodiversity ? (a) Destruction of habitat (b) Invasion of alien species (c) Keeping animals in zoological parks (d) Over-exploitation of natural resources

Which of the following is not a source of restriction endonuclease ? (a) Haemophilus influenzea (b) Escherichia coil (c) Entamoeba coil (d) Bacillus amyloliquifaciens

Which of the following is not an objective of Convention of Biodiversity? (a) Conservation of biodiversity (b) Sustainable use of biodiversity (c) Fair and equitable sharing of benefits arising out of genetic resources (d) Selective hunting of dangerous and threatening species