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Question 11 Mark

Write balanced equations when the substances are heated strongly:
Iodine I2(s)

Answer

2I (g)

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Question 21 Mark

Write balanced equations when the substances are heated strongly:
Ammonium chloride

Answer

NH 4 Cl s → NH 3 g + HCl g

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Question 31 Mark

Write balanced equations when the substances are heated strongly:
Ammonium dichromate

Answer

(NH4)2Cr2O7Heat→Cr2O3+4H2O+N2.

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Question 41 Mark

Write balanced equations when the substances are heated strongly:
Zinc nitrate hexahydrate

Answer

2Zn(NO3)2(6H2O) → 2ZnO + 4NO2 + O2 +12H2O

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Question 51 Mark

Write balanced equations when the substances are heated strongly:
Lead nitrate

Answer

2Pb(NO3)2→2PbO+4NO2+O2.

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Question 61 Mark

Write balanced equations when the substances are heated strongly:
Copper (II) carbonate

Answer

C u C O 3 → C u O + C O 2 [ g ] CuCO_3→CuO+CO_2[g] CuCO3→CuO+CO2[g]

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Question 71 Mark

Write balanced equations when the substances are heated strongly:
Copper (II) nitrate hexahydrate

Answer

2Cu(NO3)2(6H2O)⟶Heat2CuO(s)+O2(g)+4NO2(g)+12H2O

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Question 81 Mark

Write balanced equations when the substances are heated strongly:
Copper (II) sulphate pentahydrate

Answer

CuSO4•5H2O → CuSO4 + 5 H2O

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Question 91 Mark

Write balanced equations when the substances are heated strongly:
Zinc carbonate

Answer

ZnCO 3 s → Heat ZnO s + CO 2 g

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Question 101 Mark

Write balanced equations when the substances are heated strongly:
Washing soda crystals

Answer

Na 2 CO 3 . 10 H 2 O ( s ) → heat Na 2 CO 3 ( s ) + 10 H 2 O ( g )

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