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प्रश्न
The elements whose oxides can turn litmus solution blue are:
(a) carbon and sulphur
(b) sodium and carbon
(c) potassium and magnesium
(d) magnesium and sulphur
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उत्तर
(c) potassium and magnesium
Potassium and magnesium are metals whose oxides are basic in nature. These oxides turn red litmus solution to blue.
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संबंधित प्रश्न
Name the following:
Metals which forms an amphoteric oxide.
What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place.
Name the metal which has been placed just below copper in the reactivity series.
Give reason for the following:
Blue colour of copper sulphate solution is destroyed when iron filings are added to it.
Complete and balance the following equation:
Cu (NO3)2 (aq) + Zn(s) →
Name two metals which cannot displace hydrogen from dilute acids.
Describe the reaction of potassium with water. Write the equation of the reaction involved.
Give one example, with equation, of the displacement of hydrogen by a metal from an acid.
What special name is given to substances like aluminium oxide.
Write the equation for the reaction of Iron with dilute hydrochloric acid.
Name the products formed. Also indicate the physical states of all the substances involved.
In a solution of lead acetate, a strip of metal M was dipped. After some time, lead from the solution was deposited on the metal strip. Which metal is more reactive, M or lead?
Name a metal which does not react with cold as well as hot water but reacts with steam.
What is the cause of chemical bonding (or chemical combination) of atoms of elements?
Choose the correct alternative and rewrite the following:
Reaction of iron nails whith copper sulphate solution is an example of _____________________
Write the chemical equation of the above process.
Answer the following question:
An element X on reacting with oxygen forms an oxide X2O. This oxide dissolves in water and turns red litmus blue. State whether element X is metal or a non - metal. Explain with a proper example.
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
- Good thermal conductivity
- Good electrical conductivity
- Ductility
- High melting point
The substance that will be flattened on beating with a hammer is ______.
