What chemical process is used for obtaining a metal from its oxide?
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Write the balanced equation for the following chemical reactions. (i) Hydrogen + Chlorine → Hydrogen chloride (ii) Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride (iii) Sodium + Water → Sodium hydroxide + Hydrogen
What is the role of DNA in biology?
If a trait A exists in 10% of a population of an asexually reproducing species and a trait B ists in 60% of the same population, which trait is likely to have arisen earlier?
Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it, as shown in figure below. (a) What will be the action of gas on (i) dry litmus paper? (ii) moist litmus ...Read more
Write the balanced chemical equations for the following reactions. (a) Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water (b) Zinc + Silver nitrate → Zinc nitrate + Silver (c) Aluminium + Copper chloride → Aluminium chloride + CopperRead more
1. Give an example of a metal which (i) Is a liquid at room temperature? (ii) Can be easily cut with a knife? (iii) Is the best conductor of heat? (iv) Is a poor conductor of heat?
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You have two solutions, A and B. The pH of solution A is 6 and pH of solution B is 8. Which of this is acidic and which is basic?
Which metals do not corrode easily?