Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
Which one of the following statements about alkaline earth metals is not true?
Strontium salts burn with a red flame
Barium metal is used in medicine to examine the alimentary canal of a patient by X-ray.
Green plants need magnesium to make the chlorophyll that traps the energy from sunlight in photosynthesis
Red color of gemstone Ruby is due to the element beryllium present in it.
Which one of the following gases produces a red light when electricity flows through it?
Helium
Argon
Nitrogen
Neon
Which one of the following methods can be used to remove the permanent hardness of water?
Boiling
Ion-exchange
Lime treatment
Bubbling Sulphur dioxide gas
The eukaryotic chromatin is composed of
DNA only
DNA and Protein
DNA and RNA
RNA and Protein
In which of the following phylum, would you place an animal with a bilaterally symmetrical, triploblastic body without a true internal cavity (coelom)?
Porifera
Platyhelminthes
Cnidaria
Annelida
