Class VI

Element that builds up nitrates, proteins and is also used in chlorophyll, is
  1. oxygen
  2. carbon
  3. nitrogen
  4. hydrogen
Most countries make use of _________ for making coins
  1. Copper
  2. aluminum
  3. steel
  4. iron
Mixture of tartaric acid and sodium bicarbonate forms
  1. baking powder
  2. coco powder
  3. coconut powder
  4. talcum powder
Paper chromatography is a useful technique in separation and identification of different
  1. Siemens
  2. stigma
  3. plant pigments
  4. roots
A metal used in manufacturing of car batteries is known as
  1. copper
  2. gold
  3. lead
  4. Sulphur
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