1. Based on which principle electron in orbital of atom is not arranged?
Aufbau rule
VSEPR theory
Hunds rule
Pauli's exclusion rule
2. Which is known as "Milk of lime"?
CaCO3 \mathrm{CaCO}_{3} CaCO3
Ca(OH)2 \mathrm{Ca}(\mathrm{OH})_{2} Ca(OH)2
NaOH.CaO \mathrm{NaOH} . \mathrm{CaO} NaOH.CaO
CuO \mathrm{CuO} CuO
3. Which enzyme is present in pancreatic juice?
Pepsin
Maltose
Lactose
Trypsin
4. Which is the most harmful material of coal?
Nitrogen
Carbon
Sulphur
Silicon
5. Which is not antigen?
Protein
Polysaccharide
Lipoprotein
Lipid