(b) Ethhylene glycol
(c) Propyl alcohol
Which one of the following was used as a chemical weapon in the first world war?
(a) Water gas
(b) Hydrogen cyanide
(c) Carbon monoxide
(d) Mustard gas
Which one of the following elements is essential for the construction of nuclear reactors?
Aluminium surface are often 'anodized'. This means the deposition of a layer of
(a) Nickel oxide
(b) Zinc oxide
(c) Chromium oxide
(d) Aluminium oxide
An aqueous solution of copper sulphate is acidic in nature because the salt undergoes
Salts of which of the following elements provide colours to fireworks?
(a) Chromium and nickel
(b) Strontium and barium
(c) Potassium and mercury
(d) Zinc and sulphur
Which one of the following is produced during the formation of photochemical smog?
(d) Nitrogen Oxide
Which one of the following hormones contains iodine?
Which one of the following is a modified stem?
(d) Sweet potato
Corpus luteum is a mass of cell found in