Advertisements
Advertisements
प्रश्न
Why are alkali metals kept in kerosene oil?
Advertisements
उत्तर १
Alkali metals like sodium and potassium are kept in kerosene as they react with moisture and air.
उत्तर २
Alkali metals are very reactive. They react with atmospheric reagents like oxygen, carbon dioxide and water vapour and form compounds, so they are kept in an inert solvent.
APPEARS IN
संबंधित प्रश्न
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Sodium is a very reactive metal. ( )
Give reasons for the following.
Copper cannot displace zinc from its salt solution.
The atomic number of an element X is 12.
- What must an atom of X do to attain the nearest inert gas electron configuration?
- Which inert gas is nearest to X?
Mention two uses of the following metals and non-metals
Oxygen
Statements given below are incorrect. Write the correct statements :
Aluminium is best conductor of electricity.
With reference to the following metals state their use in daily life metal:
Silver
Write the name.
Two highly reactive metals-
Give reasons for the following.
- Aluminum foils are used to wrap food items.
- Immersion rods for heating liquids are made up of metallic substances.
- Sodium and potassium are stored in kerosene.
- Mercury is used in thermometers.
Metals have high melting points.
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
Metal atoms tend to have a maximum of ______ electrons in the outermost shell.
