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प्रश्न
Food cans are coated with tin and not with zinc because ______.
विकल्प
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
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
Write the chemical reaction when iron reacts with dilute H2SO4.
Write the electron-dot structures for sodium, oxygen and magnesium.
A solution of _________________ in water is green in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
State whether the following statement is true or false:
Non-metals react with dilute acids to produce a gas which burns with a 'pop' sound.
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?
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Name the metal which has been placed just below copper in the reactivity series.
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Complete and balance the following equation:
Fill in the following blank with suitable word:
Magnesium liberates ............... gas on reacting with hot boiling water.
Write the equation for the reaction of Magnesium with dilute hydrochloric acid.
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(a) an acidic oxide
(b) a basic oxide
(c) an amphoteric oxide
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Choose the correct alternative and rewrite the following:
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An element X on reacting with oxygen forms an oxide X2O. This oxide dissolves in water and turns red litmus blue. State whether element X is metal or a non - metal. Explain with a proper example.
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