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प्रश्न
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
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उत्तर
When dilute hydrochloric acid is added to a reactive metal, hydrogen gas is produced.
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संबंधित प्रश्न
_________ solution is blue in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
Iron is
(a) More reactive than zinc
(b) More reactive than aluminium
(c) Less reactive than copper
(d) Less reactive than aluminium
Why are metals called electropositive elements whereas non-metals are called electronegative elements?
What changes in the colour of iron nails and copper sulphate solution do you observe after keeping the iron nails dipped in copper sulphate solution for about 30 minutes?
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) →
Which of the following elements would yield a basic oxide.
Na, S, C, K, H
What type of oxides are formed when metals combine with oxygen? Explain with the help of an example.
What is the action of water on sodium ? Write equation of the chemical reaction involved.
What is the action of water on aluminium ? Write equation of the chemical reaction involved.
One of the following is not a neutral oxide. This is:
(a) CO
(b) H2O
(c) N2O
(d) Na2O
A basic oxide will be formed by the element:
(a) K
(b) S
(c) P
(d) Kr
An element E forms an oxide E2O. An aqueous solution of E2O turns red litmus paper blue.
(a) What is the nature of the oxide E2O?
(b) State whether element E is a metal or a non-metal.
(c) Give one example of an element like E.
Which of the following reactions will not occur? Why not?
(a) MgSO4 (aq) + Cu (s) → CuSO4 (aq) + Mg (s)
(b) CuSO4 (aq) + Fe (s) → FeSO4 (aq) + Cu (s)
(c) MgSO4 (aq) + Fe (s) → FeSO4 (aq) + Mg (s)
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?
Name a metal which It does not react with any physical state of water?
Write the chemical equation for the following reaction:
Manganese dioxide is heated with aluminum powder.
Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?
Find the odd one out:
