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प्रश्न
Out of the following oxides, the amphoteric oxide is:
(a) Fe2O3
(b) Al2O3
(c) P2O5
(d) N2O
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उत्तर
(b) Al2O3
Al2O3 can react with acids as well as bases to form salt and water.
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संबंधित प्रश्न
Metal A has electronic configuration (2, 8, 1) and metal B has (2, 8, 8, 2). Which is more reactive? Why? Identify these metals.
Name the following:
Metals which forms an amphoteric oxide.
Write the electron-dot structures for sodium, oxygen and magnesium.
Food cans are coated with tin and not with zinc because ______.
Name the metal which has been placed at the bottom of the reactivity series.
What will happen if a strip of zinc is immersed in a solution of copper sulphate?
Complete and balance the following equation:
Cu (NO3)2 (aq) + Zn(s) →
How do metals react with hydrogen? Explain with an example.
How do non-metals react with hydrogen? Explain with an example.
Write the equation for the reaction of Magnesium with dilute hydrochloric acid.
Name the products formed. Also indicate the physical states of all the substances involved.
Name one metal which displaces copper from copper sulphate solution and one which does not.
The elements whose oxides can turn phenolphthalein solution pink are:
(a) Na and K
(b) K and C
(c) Na and S
(d) K and P
One of the following is not a neutral oxide. This is:
(a) CO
(b) H2O
(c) N2O
(d) Na2O
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.
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?
If A, B, C, D, E, F, G, H, I, J and K represent metals in the decreasing order of their reactivity, which one of them is most likely to occur in a free state in nature?
Rewrite the following statement by selecting the correct option.
A solution of Al2(SO4)3 in water is _____________.
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
Which property of metals is used for making bells and strings of musical instruments like Sitar and Violin?
Why is acidified water considered to be a good conductor of electricity?
