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प्रश्न
Fill in the following blank with suitable word:
Magnesium liberates ............... gas on reacting with hot boiling water.
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उत्तर
Magnesium liberates hydrogen gas on reacting with hot boiling water.
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संबंधित प्रश्न
_________ solution is blue in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
Why is sodium kept immersed in kerosene oil?
Write equations for the reactions of calcium and potassium with water.
What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place.
Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).
A student added few pieces of aluminium metal to two test tubes A and B containing aqueous solutions of iron sulphate and copper sulphate. In the second part of her experiment, she added iron metal to another test tubes C and D containing aqueous solutions of aluminium sulphate and copper sulphate.
In which test tube or test tubes will she observe colour change? On the basis of this experiment, state which one is the most reactive metal and why.
What name is given to those metal oxides which show basic as well as acidic behaviour?
A copper coin is kept immersed in a solution of silver nitrate for some time. What will happen to the coin and the colour of the solution?
Fill in the following blank with suitable word:
Ordinary aluminium strips are not attacked by water because of the presence of a layer of ................. on the surface of aluminium.
Fill in the following blank with suitable word:
Calcium is a ................. reactive metal than sodium.
Can we keep sodium immersed under water? Why?
Describe the reaction of potassium with water. Write the equation of the reaction involved.
Out of the following oxides, the amphoteric oxide is:
(a) Fe2O3
(b) Al2O3
(c) P2O5
(d) N2O
Which of the following pair of reactants can undergo a displacement reaction under appropriate conditions?
(a) MgSO4 + Fe
(b) ZnSO4 + Fe
(c) MgSO4 + Pb
(d) CuSO4 + Fe
Metal A burns in air, on heating, to form an oxide A2O3 whereas another metal B burns in air only on strong heating to form an oxide BO. The two oxides A2O3 and BO can react with hydrochloric acid as well as sodium hydroxide solution to form the corresponding salts and water.
(a) What is the nature of oxide A2O3?
(b) What is the nature of oxide BO?
(c) Name one metal like A.
(b) Name one metal like B.
A zinc plate was kept in a glass container having CuSO4 solution. On examining it was found that the blue colour of the solution is getting lighter and lighter. After a few days, when the zinc plate was taken out of the solution, a number of small holes were noticed in it. State the reason and give chemical equation of the reaction involved.
What is the characteristic of the electronic configuration of noble gases?
Where does the metal aluminium, used in the thermit process, occurs in the reactivity series of metals?
Which property of metals is used for making bells and strings of musical instruments like Sitar and Violin?
The substance that will be flattened on beating with a hammer is ______.
