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प्रश्न
State the position of the following in the periodic table:
Alkali metals
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उत्तर
They are placed in IA group, the first column on the left of the periodic table.
संबंधित प्रश्न
Give reasons for the following.
Copper cannot displace zinc from its salt solution.
Name one ore of manganese. Which compound of manganese is present in this ore? Also write its chemical formula.
What is an alloy? How is an alloy made?
Give reasons
Graphite is used in the leads of pencils
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Hydrochloric acid,
State the position of the following in the periodic table:
Halogens
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
An amorphous substance which turns from pale green to black on strong heating evolving a colourless, acidic gas as the only gaseous product.
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.
Can you store pickle in an aluminium utensil? Give reason.
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.
