V. Short answer type questions :-
1. Why the sulphur is non ductile in nature ? Why the metals can't cut with a knife except sodium?
2. Why the copper not react with hydrochloric acid even on heating?
3. A doctor prescribed a tablet to a patient suffering from iron deficiency. The tablet does not look like iron Explain why?
4. Iron is more reactive than copper. Can you write an activity to show this?
VI. Long answer type questions :-
1. Write the three chemical properties of metal along with the equation.
2. Write three physical properties of non metal.
Answers
Hy here is your answer ✌️
Short answer type question ✔️
1. Sodium, potassium, lithium are soft metals and can be easily cut. It is the secong least dense metal after lithium. It is a soft solid that has a low melting point and can be cut with knife while iron and gold are hard and dense metals which are melleable and ductile.
2. These metals are placed above hydrogen in the reactivity series. As copper is less reactive than hydrogen, therefore it will not liberate hydrogen gas from the acids like HCl, HNO. ... Hence it does not react with copper metal at all.
3. Because our stomach can't take and digest iron or ferum directly so the tablets of iron contain iron compounds which our stomach accepts and can digest. Later this iron taken in compound form fulfills our body iron requirements. That's why iron tablets do not look like iron.
4. Material required- Copper sulphate solution, Iron nail, test tube.
Method- In the test tube, pour copper sulphate solution. Drop the iron nails it and wait for the reaction to take place.
Observation- Solution turns blue. The nail which is in the contact with the solution turns reddish-brown.
Conclusion- The above process can be understood by the following equation-
-Fe+CuSo4 ➜ FeSo4+Cu
Thsi reaction is a type of displacement reaction.
Long answer type question ✔️
1. Chemical properties of metal =>
- The density of metals is usually high.
- Metals are malleable and ductile.
- Metals form an alloy with other metals or non – metals.
2. Physcial property of non - metal =>
- They are dull, they do not have lustre like metals.
- Nonmetals are poor conductors of heat. They’re poor thermal conductors.
- They are very weak and brittle. They tend to easily break or shatter.