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प्रश्न
Name the following:
A halogen which is a solid at room temperature.
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उत्तर
Iodine
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संबंधित प्रश्न
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Generally, non-metals react with acids. ( )
How does the electrical conductivity of copper alloys, brass and bronze, differ from that of pure copper?
How are the properties of an alloy different from those of the constitutent elements?
Mention two uses of the following metals and non-metals
Iodine
Statements given below are incorrect. Write the correct statements :
Aluminium is best conductor of electricity.
State two important uses of following metal
Uses of tin
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Hydrochloric acid,
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Oxygen
What was Mendeleev's basis for the classification of elements?
State the position of the following in the periodic table:
Halogens
With reference to the following metal state its use in daily life:
Magnesium
Complete the following flow chart.
Which of the following is not a metal?
The liquid metal at room temperature ______.
The typical shine of metals is called ______.
Metals have high melting points.
Match the following
| i. | Softest metal | a. | Copper |
| ii. | Hardest metal | b. | Sodium |
| iii. | Hardest non–metal | c. | Osmium |
| iv. | Ductility | d. | Diamond |
Match the following
| i. | Silica | a. | Caustic potash |
| ii. | Potassium hydroxide | b. | Sand |
| iii. | Sodium hydroxide | c. | Calamine |
| iv. | Zinc carbonate | d. | Caustic soda |
Compare the conductivity of metals and non–metals.
