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Report | Shashank mishra asks : : Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which of these statements gives the correct picture? 1.In alkali metals the reactivity increases, but in the halogens it decreases with increase in atomic number down the group. 2.The reactivity decreases in the alkali metals, but increases in the halogens with increase in atomic number down the group. 3.In both the alkali metals and the halogens the chemical reactivity decreases with increase in atomic number down the group. 4.Chemical reactivity increases with incr |
Report | Gokul .s asks : How is the increase in demand of fossil fuels affecting the environment adversely?suggest 2 way to minimize the problem |
Report | Ranjita asks : Now a days the metal electrodes r replaced with amalgams in electrochemical cells for better efficiency. How does the mercury tends to increase the metal activity so tht it acts as a better anode ??? |
Report | Aishwary srivastava asks : .A metal cube is placed in an empty vessel. When water is filled in the vessel so that the cube is completely immersed in the water,the force on the bottom of the vessel in contact with the cube (A) will increase (B)will decrease (C)will remain same (D) will become zero |
Report | Surabhi sinha asks : How does mass of a body increases with increase in speed |
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