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Draw a neat and labelled diagram for dispersion of light.
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Classify the following metals based on their reactivity.
Cu, Zn, Ca, Mg, Fe, Na, Li, Hg
| More reactive | Moderately reactive | Less reactive |
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Explain the following reaction with the balanced equation.
Sodium burns in air
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Explain the following reaction with the balanced equation.
Reaction of aluminium with oxygen
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Explain the following reaction with the balanced equation.
Magnesium reacts with dil HCl
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Explain the following reaction with the balanced equation.
Sulphur burns in air
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Describe the merits of Mendeleev’s periodic table?
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Describe the merits of Mendeleev’s periodic table?
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Rainbow is a beautiful natural phenomenon. It is the combined effect of a natural three processes together produced by light. Write it into the circle.
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Observe the given figure and write appropriate phenomenon of light in the box.
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Observe the given figure and answer the following questions.
- Which colour light rays bend most?
- Which colour light rays bend least.
- What is the wavelength of violet light rays?
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Observe the following diagram and identify the type of reaction and write observation.
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Explain why spacecraft take longer to reach the moon than light?
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______ colour is deviated the least in the spectrum of white light obtained with a glass prism.
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Observe the given figure of Fleming's Left Hand Rule and write the labels of 'A' and 'B':
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Identify the type of chemical reaction given below:
\[\ce{CuSO4 + Fe -> FeSO4 + Cu}\]
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Complete the following chemical reaction:
\[\ce{CuSO4 (aq) + Pb (s) -> \underline{}\underline{}\underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{}\underline{}\underline{}}\]
Name the chemical reaction type.
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Metal ‘A’ has electronic configuration 2, 8, 1 and metal ‘B’ has electronic configuration 2, 8, 8, 2. Out of these, which metal is more reactive? Write the reaction of this metal with dilute HCl acid.
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Complete the given chemical equation:
\[\ce{Zn(s) + CuSO4(aq) -> \underline{}\underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{}\underline{}}\]
Name the type of reaction.
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When a spacecraft is launched into outer space, the velocity attained by it should be greater than the escape velocity.
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