Which of these metals is most commonly used as control rods in the nuclear reactors? [A] Platinum [B] Cadmium [C] Cobalt [D] Silver
Adv.
Cadmium
Which of these is the only metal that is liquid at ordinary room temperature and pressure? [A] Copper [B] Zinc [C] Mercury [D] Beryllium
Which of the following non-metal has an isotope which can be used to detect secret nuclear fuel reprocessing facilities? [A] Selenium [B] Tellurium [C] Neon [D] Krypton
Which of the following non-metals is used in the manufacturing of match sticks? [A] Carbon [B] Nitrogen [C] Sulphur [D] Phosphorous
Which of the following non-metal is used for bleaching woodpulp? [A] Argon [B] Chlorine [C] Fluorine [D] Gallium
Which of these non-metals is mainly used as an inert shielding gas? [A] Xenon [B] Hydrogen [C] Argon [D] Krypton
Which of these non-metals is commonly used in fire-crackers? [A] Silicon [B] Neon [C] Sulphur [D] Fluorine
Which of these gases is produced on addition of Baking soda to food items? [A] Helium [B] Hydrogen [C] Carbon dioxide [D] Nitrogen
Which of the following gas is responsible for burning of eyes when we cut an onion? [A] Chlorine [B] Helium [C] Sulphur [D] Methane
Which is the most abundant metal in the Earth’s crust? [A] Iron [B] Aluminium [C] Copper [D] Silicon
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