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प्रश्न
Out of aluminium, copper, calcium and tin, the most reactive metal is:
(a) aluminium
(b) copper
(c) tin
(d) calcium
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उत्तर
(d) calcium
Calcium lies above the other three metals in reactivity series.
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संबंधित प्रश्न
Iron is
(a) More reactive than zinc
(b) More reactive than aluminium
(c) Less reactive than copper
(d) Less reactive than aluminium
The solution of Aluminium sulphate in water is .....................
(a) Green
(b) Colourless
(c) Pink
(d) Blue
What will happen if a strip of copper is kept immersed in a solution of silver nitrate (AgNO3)?
Complete and balance the following equation:
Na2O + H2O →
Which of the following elements would yield a basic oxide.
Na, S, C, K, H
What type of oxides are formed when non-metals react with oxygen? Explain with an example.
Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.
How do metals react with hydrogen? Explain with an example.
Describe the reaction of potassium with water. Write the equation of the reaction involved.
What is meant by the reactivity series of metals? Arrange the following metals in an increasing order of their reactivities towards water:
Zinc, Iron, Magnesium, Sodium
One of the following is not a neutral oxide. This is:
(a) CO
(b) H2O
(c) N2O
(d) Na2O
In nature, metal A is found in a free state while metal B is found in the form of its compounds. Which of these two will be nearer to the top of the activity series of metals?
What are noble gases
Write the chemical equation of the above process.
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
(i) Good thermal conductivity
(ii) Good electrical conductivity
(iii) Ductility
(iv) High melting point
An element X is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in the air. It reacts vigorously with water. Identify the element from the following.
The substance that will be flattened on beating with a hammer is ______.
Metals are generally solid. Which of the following metals is in the liquid state at room temperature?
Why is acidified water considered to be a good conductor of electricity?
