Question

2
ral Questions
1. Name a material which loses its shine when exposed to moist air.
2. Which material is the hardest known material ?
3. Name any two properties on the basis of which materials can be classified
4. Name two materials which do not dissolve in water and are lighter than water.
5. Name a substance which is soluble in water.
6. A substance when placed in water floats on it. What do you conclude from this​

Answer 1

Answer:

1) copper

2) diamond

3) conductance,lustre etc...

4)wood and ice

5)Nacl( table salt)

6)from this we will conclude that the object which is floating is having a density less than 1...

Explanation:

hope this will help u....

Answer 2

iron

wurtzite boron

Objects are grouped on the basis of properties like lustre, hard/softness, transparency, solubility, floatation, attraction towards magnet, conduction of heat and conduction of electricity. Property - Lustre: Materials can be grouped as lustrous and non-lustrous on the basis of lustre/shine possessed by them.