Materials Metal...

Which of the following is an insulator?

Soft metal(s) which can be cut with a knife is(are) :

Which of the following observations most strongly suggest that a solid element X is a non- metal?​

Generally, metallic oxides are basic and non-metallic oxides are acidic in nature. Solution of which of the following oxides in water will change the colour of blue litmus to red?

Non-metals which are present in fertilizers and enhance the growth of plants is:

Paheli prepared a blue coloured solution of copper sulphate in beaker A and placed an iron nail in it. Boojho prepared a yellowish green solution of ferrous sulphate in beaker B and placed a copper wire in it. Changes they observe in the two beakers after an hour will be :

An alloy which is sonorous is:

Compound can be reduced to copper when heated with coke is 

X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus.  If X is a non metal, then the litmus will turn: