Please select a subject first
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Match the following:
| 1. | Soil erosion | energy saving |
| 2. | Bio gas | acid rain |
| 3. | Natural gas | removal of vegetation |
| 4. | Green house gas | renewable energy |
| 5. | CFL bulbs | CO2 |
| 6. | Wind | non-renewable energy |
| 7. | Solid waste | lead and heavy metals |
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Soil erosion can be prevented by ______.
Concept: undefined >> undefined
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A renewable source of energy is ______.
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Soil erosion is more where there is ______.
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What will happen if trees are cut down?
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What are the agents of soil erosion?
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How will you prevent soil erosion?
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What are the consequences of soil erosion?
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The gram molecular mass of oxygen molecule is ______.
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Molar mass of CO2 is 42g.
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Answer the following question using the data given below:
- Assertion: The Relative Molecular Mass of Chlorine is 35.5 a.m.u.
- Reason: The natural abundance of Chlorine isotopes are not equal.
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Calcium carbonate is decomposed on heating in the following reaction
CaCO3 → CaO + CO2
How many moles of Calcium carbonate is involved in this reaction?
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Calcium carbonate is decomposed on heating in the following reaction
CaCO3 → CaO + CO2
Calculate the gram molecular mass of calcium carbonate involved in this reaction.
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Calcium carbonate is decomposed on heating in the following reaction
CaCO3 → CaO + CO2
How many moles of CO2 are there in this equation?
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Volume percentage decreases with increases in temperature because ______
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3.5 litres of ethanol is present in 15 litres of an aqueous solution of ethanol. Calculate volume percent of ethanol solution.
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A solution is prepared by dissolving 45 g of sugar in 180 g of water. Calculate the mass percentage of solute.
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A single displacement reaction is represented by X(s) + 2HCl(aq) → XCl2(aq) + H2(g). Which of the following(s) could be X.
(i) Zn
(ii) Ag
(iii) Cu
(iv) Mg.
Choose the best pair.
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Match the following
Identify the types of reactions.
| REACTION | TYPE |
| NH4OH(aq) + CH3COOH(aq) → CH3COONH4(aq) + H2O(l) | Single Displacement |
| Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s) | Combustion |
| \[\ce{ZnCO3_{(s)} + ->[Heat]ZnO_{(s)} + CO2_{(g)}}\] | Neutralization |
| C2H4(g) + 4O2(g) → 2CO2(g) + 2H2 O(g) + Heat | Thermal decomposition |
Concept: undefined >> undefined
