Question

Q13. All metals are solids, with the exception of:
i) aluminum ii) graphite iii) mercury
iv) silver
Q14. The hardest naturally occurring substance, that is a non-metal, is:
i) graphite ii) diamond iii) carbon iv) none of these
Q15. The least reactive metal is:
i) gold
ii) silver
iii) iron
iv) sodium
Q16. Oxides of non-metals are:
i) acidic ii) neutral
iii) alkaline iv) both (i) and (ii)
Q17. A dark coloured, viscous, strong smelling liquid is:
i) Alcohol ii) Kerosene iii) Petroleum
iv) CNG
Q18. A renewable source of energy is:
i) air ii) coal
iii) petroleum
iv) natural gas
Q19. Natural gas is stored under high pressure as:
i) CNG ii) Petrol iii) Coal iv) none of these​

Answer 1

Answer:

13. Mercury

14. Diamond

15. Gold

16. Acidic

17. petrol

18. Air

19. CNG

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