Chemical Changes / Name the following

1. A bluish-green compound on heating leaves a black residue and evolves a gas that turns lime water milky – Copper Carbonate

2. A red compound undergoes thermal decomposition yielding a yellow residue and oxygen – Red Lead

3. Two colourless gases which when mixed form a coloured gas – Nitric Oxide, Oxygen

4. A white crystalline salt decrepitates on heating liberating a reddish brown gas – Lead Nitrate

5. Orange crystals which decomposes exothermically and forms a green fluffy residue – Ammonium Dichromate

6. A metal which reacts reversibly with steam – Iron

7. A white salt on heating gives a residue which is yellow when hot, white when cold and a colourless gas which turns lime water milky – Zinc Carbonate

8. A white salt on heating gives a residue which is yellow when hot and white when cold and a reddish brown gas – Zinc Nitrate

9. A nitrate which when heated leaves no residue – Ammonium Nitrate

10. A white crystalline compound melts when heated and evolves a colourless gas which relights a glowing splinter – Sodium Nitrate or Potassium Nitrate

11. A metal which reacts with water to form a turbid solution – Calcium

12. A non-metal which reduces water to hydrogen – Carbon

13. An oxide that dissolves in water to form a solution that turns blue litmus paper red – Acidic Oxide

14. A metal that reacts violently with cold water – Potassium or Sodium

15. Blue crystalline salt that becomes white on heating – Blue Vitriol

16. A metallic nitrate that when heated does not produce a coloured gas – Sodium or Potassium Nitrate

17. A carbonate on heating evolves two gases – Silver Carbonate

18. A carbonate that does not undergo thermal decomposition – Sodium Carbonate

19. A metal oxide that when heated liberates oxygen along with a gaseous product which condenses as a liquid – Mercuric Oxide

20. A red oxide that forms two products on heating – a solid product and a gaseous product. -- Trilead Tetroxide ( Red Lead )

21. A nitrogenous compound that evolves nitrogen on heating – Ammonium Dichromate

22. A nitrate on heating gives a metal as one of the products – Silver Nitrate

23. A black compound formed when a bluish green nitrate is heated – Copper Oxide

24. A nitrate that does not liberate oxygen on heating – Ammonium Nitrate

25. A metal that is above hydrogen in the activity series but does not displace hydrogen from water – Lead

26. The gaseous mixture formed when steam is passed over heated coke – Water Gas

27. The compound responsible for the milkyness of clear lime water when CO₂ is passed through it – Calcium Carbonate

28. A gas that puts off a burning splinter with a pop-sound – Hydrogen

29. A mixed acid anhydride – Nitrogen Dioxide

30. The other name of Nitric Anhydride – Dinitrogen Pentoxide

31. The anhydride of sulphurous acid – Sulphur Dioxide

32. The anhydride of phosphoric acid – Phosphorus Pentoxide

33. Metallic oxide that reacts with acid as well as alkali – Zinc Oxide or Aluminium Oxide

34. Two metals that liberate hydrogen gas with dilute acid as well as alkali – Zinc / Aluminium

35. Two metals that react with 1%, cold nitric acid to give hydrogen gas – Manganese or Magnesium