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प्रश्न
Select the appropriate option for the following statement:
The element placed in the extreme left of the Modern Periodic Table.
विकल्प
Boron
Chlorine
Potassium
Platinum
Radon
उत्तर
Potassium.
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संबंधित प्रश्न
Give an example of a metal which is the best conductor of heat.
Which of the following statements is correct?
Name two metals which are used for making domestic utensils and factory equipment.
Name one property which is characteristic of non-metals.
Name two physical properties of carbon in which it's behaviour is not as expected from it's classification as non-metal.
Name a non-metal having lustre (shining surface).
Name a metal that is most malleable
Name a metal used in making electric cables
Name a liquid non-metal.
Select from the following ist:
`Fe_2O_3, , NO, PbO, Mn_2O_7`
Acidic oxide ………………
Name:
a metal which is brittle
Give the balanced reactions for the following:
Iron reacts with dilute HCI
Give a short account of heating effect on metal carbonates based on the activity series ?
Give the effect of heat on metal oxides based on the activity series ?
The table below compares some properties of metals and non-metals. Write down the missing
statements (i) to (iv) :
| Metals | Non-metals |
| (i) ………………….. | Poor conductors of heat |
| (ii) Malleable | …………………… |
| (iii) Form positive ions | …………………… |
| (iv) ………………… | Form acidic oxides |
Which metal occurs as a halide also gives the name of their respective ore.
Diamond is a hard substance.
Pencil lead contains
Which non-metal is essential for our life and all living beings?
