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प्रश्न
Name the following:
A halogen which is a solid at room temperature.
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उत्तर
Iodine
APPEARS IN
संबंधित प्रश्न
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Copper displaces zinc from zinc sulphate solution. ( )
State one use of the following metal:
Aluminium
The alloy in which one of the metals is mercury is called an ______.
Mention two uses of the following metals and non-metals
Iodine
Give reasons
Magnesium is used in fire works.
Statements given below are incorrect. Write the correct statements :
Zinc is used for making power transmission wires.
State two important uses of following metal
Uses of tin
Why is hydrogen placed with alkali metals?
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Hydrochloric acid,
When a copper coin is dipped in silver nitrate solution, a glitter appears on the coin after some time. Why does this happen? Write the chemical equation.
Match the alloys given in column I to the uses given in column II :
| Column I | Column II |
| (i) Duralumin | A. Electrical fuse |
| (ii) Solder | B. Surgical instruments |
| (iii) Brass | C. Aircraft body |
| (iv) Stainless Steel | D. Decorative articles |
What is it made from? Why?
Ornaments
Give a reason why a green deposit is seen on the surface of an article of copper
Name the following:
The chemical compound responsible for the green deposit on the surface of articles of copper.
The minerals from which the metal can be separated economically are called _______.
When a copper coin is dipped in the solution of silver nitrate, it shows a lustre on its surface. Explain this process with the help of a chemical equation.
Electronic configuration of metal A is 2,8,1. Electronic configuration of metal B is 2,8,8,2. Which of the above metals is more reactive? Explain with reason.
A doctor prescribed a tablet to a patient suffering from iron deficiency. The tablet does not look like iron. Explain.
Metals are ______ conductors of heat and electricity.
Sodium is a hard metal.
