Which one is a weak acid?
Citric acid
Nitric acid
Sulphuric acid
Hydrochloric acid
C.
Sulphuric acid
Citric acid is a carboxylic acid and carboxylic acid is a weaker acid than mineral acids like nitric acid, sulphuric acid, and hydrochloric acid because it does not easily release H ion.
Magnetic quantum number determines
shape of orbitals
orientation of orbitals
total energy of an-orbital
spin of an electron
Down's syndrome is caused due to
monosomy of 21st chromosome
trisomy of 21st chromosome
an extra chromosome in male
an extra chromosome in female
Which scientist was developed the 'key' for the identification of animals?
Goethe
Cuvier
John Ray
Theophrastus
HIV mainly infects
Cytotoxic T-lymphocytes
Helper lymphocytes
Killer lymphocytes
Cell mediated T-lymphocytes