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Displaying 5 out
of 28
questions & answers.
Q1.
Explain the term 'chemical formula'. State why the molecular formula of zinc carbonate is 'ZnCO3'.
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answer not shownQ2.
Write the formula of the following compounds :
| 1] Potassium - | a. chloride | b. nitrate | c.carbonate | d. bisulphate |
| e. sulphite | f. dichromate | g. permanganate | h. zincate | |
| i. plumbite | j. sulphate | k. bicarbonate | l. aluminate | |
| m. hydroxide | n. iodide | o. nitrite | p. bisulphate | |
| 2] Sodium - | a. chloride | b. nitrate | c. carbonate | d. bisulphate |
| e. sulphite | f. dichromate | g. permanganate | h. zincate | |
| i. plumbite | j. sulphate | k. bicarbonate | l. aluminate | |
| m. hydroxide | n. iodide | o. nitrite | p. bisulphite | |
| 3] Calcium - | a. chloride | b. nitrate | c. carbonate | d. bisulphite |
| e. sulphite | f. sulphate | g. bicarbonate | h. hydroxide | |
| 4] Magnesium - | a. chloride | b. nitrate | c. carbonate | d. sulphate |
| e. bicarbonate | f. hydroxide | g. oxide | ||
| 5] Zinc - | a. chloride | b. nitrate | c. carbonate | d. sulphate |
| e. hydroxide | f. oxide | |||
| 6] Aluminium - | a. chloride | b. nitrate | c. carbonate | d. sulphate |
| e. hydroxide | f. oxide | |||
| 7] Copper - | a. Copper [I] chloride; Copper [II] chloride | b. Copper [I] oxide; Copper [II] oxide | ||
| c. Copper [II] nitrate; Copper [II] sulphate | d. Tetra amine copper [II] sulphate | |||
| 8] Iron - | a. Iron [II] chloride; Iron [III] chloride | b. Iron [II] oxide; Iron [III] oxide | ||
| c. Iron [II] sulphate; Iron [III] sulphate | d. Iron [II] sulphide; Iron [III] sulphide | |||
| e. Iron [II] hydroxide; Iron [III] hydroxide | ||||
| 9] Lead - | a. Lead [II] chloride; Lead [II] oxide; | b. Lead [II] hydroxide; Lead [II] nitrate | ||
| c. Lead [II] sulphate | ||||
| 10] Silver - | a. Silver [I]chloride; Silver [II] chloride; | b. Diamine silver chloride | ||
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answer not shownQ3.
Write the names of the following compounds :
| a. KCIO | b. HCIO | c. NaClO3 | d. AlN | e. K2Cr2O7 |
| f. KMnO4 | g. Ca3N2 | h. Ca3(PO4)2 | i. H2SO3 | j. HCI |
| k. HNO3 | l. H2SO4 | m. NH4OH | n. NaOH | o. H2CO3 |
| p. HNO2 | q. Mg(HCO3)2 | r. NaAlO2 | s. K2PbO2 | t. Cr2(SO4)3 |
| u. Na2O |
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answer not shownQ4.
Explain the term 'chemical equation'. What is meant by 'reactants' and 'products' in a chemical equation.
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answer not shownQ5.
Give an example of a chemical equation in which two reactants form -
- one product
- two products
- three products
- four products
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- N2 +3H2 ---> 2NH3
- 2Na + 2H2O → 2NaOH + H2
- Cu + H2SO4 → CuSO4 + SO2 + H2O
- K2Cr2O7 + HCl → KCl + CrCl3 + H2O + Cl2
