General Science For UPSC/SSC/Railways/CTET

CHEMISTRY PART 1

Q1. In how many states does matter exists ?
Ans. 4 { solid,liquid,gas,plasma }

Q2. Common names of following ?
Ans. NaOH -  Caustic Soda
          KOH - Caustic Potash
          Na2CO3 - Washing Soda
          NaHCO3 - Baking Soda
          CaCO3 - limestone
          CaO - Quick Lime
          Ca(OH)2 - Lime Water/ Slaked Lime

Q3. The only metal which is liquid at room temperature ?
Ans. Mercury.

Q4. Composition of following alloys ?
Ans. Duralumin - Al/Cu/Mn
          Gun Metal - Cu/Zn/Sn
          German Silver - Cu/Zn/Ni
          Solder - Pb/Sn

Q5. Formula of Rust ?
Ans. Fe3O4

Q6. Formula of Ozone ?
Ans. O3

Q7. Plaster of Paris ?
Ans.  CaSO4.1/2 H2O

Q8. Who discovered eletron , proton, neutron ?
Ans. Electron - J J Thomson 
          Proton - Ernest Rutherford
          Neutron - James Chadwick

Q9. Who discovered radioactivity ?
Ans. Henry Bacquerrel.

Q10. Which acid is present in stomach ?
Ans. Hydrochloric Acid/ HCl