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MWWMPAMWTE19. Which gas in the air supports burning(a) Oxygen(b) Hydrogen(c) Helium20. Which gas is used of making fertilisers?(c) Neorn(a) NitrogernWhich of the following is used for the construction of buildings and(a) MarbleThe molten matter inside the Earth is called-(b) Krypton21.(b) Pumice(c) Emeral22.(a) Lava ] (b) Magma ⥠(c) IgneoThe modified form of sedimentary and igneous rocks are called-(a) Metamorphic rocks(b) Sedimentary rocks23. |
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