Which one of the following is the purest form of carbon?
Diamond is the hardest and purest form of carbon, as it consists entirely of carbon atoms arranged in a crystal lattice structure.
Graphite, although composed of carbon, has a different atomic arrangement, making it a less pure form than diamond.
Carbon black and wood charcoal contain impurities along with carbon, which disqualifies them as pure forms of carbon.
Which statement best reflects the role of non-metallic minerals in India?
Which one of the following pairs (Metals or Minerals) is not correctly matched?
Which one of the following is a non-metallic mineral?
Compounds of carbon containing carbon-carbon double bond are known as:
Which of the given statements about non-metals is true?
Which metal is placed at the top of the reactivity series?
Which of the statements about the reaction below is/are correct?
2ZnO (s) + C (s) = 2 Zn (s) + CO_2 (g)
(i) Zinc is getting reduced
(ii) Carbon is getting oxidized
(iii) Zinc is getting oxidized.
(iv) Carbon is getting reduced
Which of the following statements are correct?
(i) Tin-lead alloy is used for making fuse wires.
(ii) Fuse is connected to live wire.
(iii) The material chosen for making fuse should have high melting point.
Which of the following non—metals is a liquid?
