Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(D)>Q 6

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9th ICSE

IMPORTANT

Earn 100

Divide the following redox reaction into oxidation and reduction half reactions.

$Zn + {Pb}^{2 +} \to {Zn}^{2 +} + Pb$

Important Questions on Study of the First Elements-Hydrogen

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9th ICSE

IMPORTANT

Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(D)>Q 6

Divide the following redox reaction into oxidation and reduction half reactions.

Z n + {C u}^{2 +} \to Z n^{+} + C u

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9th ICSE

IMPORTANT

Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(D)>Q 6

Divide the following redox reaction into oxidation and reduction half reactions.

{C l}_{2} + 2 B r^{-} \to B r_{2} + 2 C l^{-}

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9th ICSE

IMPORTANT

Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(D)>Q 7

Write the equation in the ionic form ${CuSO}_{4} (aq) + Fe (s) \to {FeSO}_{4} (aq) + Cu (s)$ .

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9th ICSE

IMPORTANT

Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(D)>Q 7

Divide the equation into oxidation and reduction half reactions.

${CuSO}_{4} (aq) + Fe (s) \to {FeSO}_{4} (aq) + Cu (s)$

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9th ICSE

IMPORTANT

Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(D)>Q 8

Give reason, hydrogen is collected by the downward displacement of water and not of air, even though it is lighter than air.

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9th ICSE

IMPORTANT

Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(D)>Q 8

Give reason, a candle brought near the mouth of a jar containing hydrogen gas starts burning but is extinguished when pushed inside the jar.

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9th ICSE

IMPORTANT

Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(D)>Q 8

Give reason, apparatus for laboratory preparation of hydrogen should be airtight and away from a naked flame.

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9th ICSE

IMPORTANT

Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(D)>Q 9

Select the odd one out and justify your answer.

$Zn, Fe, Mg$ and $Na$