METALS AND NON METALS
- What will happen if a strip of copper is kept immersed in a solution of silver nitrate?
- What is thermite reaction? Write reactions.
- Name the metal and non-metal found in liquid state.
- What is the role of activity series in the chemistry?
- What is pig and wrought iron?
- How is mercury extracted from its ore?
- What are non metals?
- Why hydrogen gas is not evolved when a metal reacts with nitric acid?
- What is difference between malleability and ductility?
- Why potassium is kept in kerosene?
- Which non metal is lustrous?
- Why gold is found in Free State?
- Why we use 22 carat gold?
- What is ore and gangue?
- What is metallurgy?
- Write a reaction between manganese di oxide and aluminum?
- Which metals do not corrode easily?
- What do you mean by electrolytic reduction? Explain this process?
- What are amphoteric oxides? Explain with an example?
- What happen when metals are burnt in air? Explain with examples of copper and aluminum?
- What are endothermic and exothermic reactions?
- What is roasting and calcination ? Explain?
- Write reactions to obtain copper by simple heating?
- How does following react with water
Calcium b) sodium c)iron d) aluminium
- Explain the electrolytic refining of copper?
- Explain the formation of magnesium chloride?
- Which non metal conducts electricity?
- What is galvanization?
- Why the surface of copper becomes green after exposed to air for sometime?
- Differentiate between metal and non metal?
- What are electrovalent bonds? Explain its properties?
- What is an alloy? What is use of it? What is the composition of solder, brass? Write its uses also?
- Show in a tabular form the various steps involved in the e extraction of metals from its ore?
- What is corrosion? Give two examples when it is useful? How it can be prevented?
- Which metal can be cut with knife?
- Which is lusturous non metal?
- What happen when metals are burnt in air?
- What are alkalis? How are these prepared?
- Why is potassium kept in kerosene?
- Why magnesium starts floating on the water?
- Why hydrogen gas is not evolved when a metal reacts with nitric acid?
- What do you mean by concentration of an ore?
- What is corrosion? Give two examples when it is useful? How it can be prevented?
- What are basic and acidic oxides? Give examples
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