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प्रश्न
Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.
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उत्तर
Magnesium and manganese are two metals that liberate hydrogen gas from very dilute nitric acid.
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संबंधित प्रश्न
.................... liberated when acetic acid reacts with sodium metal.
(a) Hydrogen
(b) Chlorine
(c) Oxygen
(d) Nitrogen
Iron is
(a) More reactive than zinc
(b) More reactive than aluminium
(c) Less reactive than copper
(d) Less reactive than aluminium
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
Write the electron-dot structures for sodium, oxygen and magnesium.
Food cans are coated with tin and not with zinc because ______.
Explain the following reaction with the help of a balanced chemical equation:
Magnesium reacts with hot water.
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.
Explain why, the surface of some metals acquires a dull appearance when exposed to air for a long time.
Complete and balance the following equation:
Fill in the following blank with suitable word:
Magnesium liberates ............... gas on reacting with hot boiling water.
What is the nature of the oxide Na2O? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.
You are given a solution of AgNO3. Which of the following do you think cannot displace Ag from AgNO3solution?
(a) Magnesium
(b) Zinc
(c) Gold
(d) Copper
The least reactive metal among the following is:
(a) sodium
(b) silver
(c) copper
(d) lead
An element X reacts with hydrogen, when heated, to form a covalent hydride H2X. If H2X has a smell of rotten eggs, the element X is likely to be:
(a) carbon
(b) sulphur
(c) chlorine
(d) phosphorus
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
Choose the correct alternative and rewrite the following:
Reaction of iron nails whith copper sulphate solution is an example of _____________________
Which property of metals is used for making bells and strings of musical instruments like Sitar and Violin?
Which one among the following is an acidic oxide?
