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प्रश्न
Food cans are coated with tin and not with zinc because ______.
पर्याय
zinc is costlier than tin
zinc has a higher melting point than tin
zinc is more reactive than tin
zinc is less reactive than tin
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उत्तर
Food cans are coated with tin and not with zinc because zinc is more reactive than tin.
Explanation:
Zinc is more reactive than tin (zinc is above tin in the reactivity series), so it will react with organic acids (present in food) to form poisonous compounds. To avoid this, food cans are coated with tin and not with zinc.
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
Write equations for the reactions of iron with steam.
Differentiate between metal and non-metal on the basis of their chemical properties.
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.
A solution of _________________ in water is green in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
Name the metal which has been placed just below copper in the reactivity series.
What type of oxides are formed when non-metals react with oxygen? Explain with an example.
What type of oxides are formed when metals combine with oxygen? Explain with the help of an example.
How do non-metals react with hydrogen? Explain with an example.
Can we keep sodium immersed under water? Why?
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
Give one example, with equation, of the displacement of hydrogen by a metal from an acid.
Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why?
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
Which one of the following four metals would be displaced from the solution of its salt by the other three metals?
(a) Zn
(b) Ag
(c) Cu
(d) Mg
Rewrite the following statement by selecting the correct option.
A solution of Al2(SO4)3 in water is _____________.
Write the chemical equation for the following reaction:
Calcium metal reacts with water.
Metals are generally solid. Which of the following metals is in the liquid state at room temperature?
