Please select a subject first
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State the rule to determine the direction of a magnetic field produced around a straight conductor-carrying current.
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Why do we get a spectrum of seven colors when white light is dispersed by a prism?
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State the right-hand thumb rule.
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Write the merits of the modern periodic table over Mendeleev’s Periodic table
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Draw the diagram of refraction of light in the glass slab
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Observe the following figure and answer the questions given under it:
1) How many times does refraction take place in the above figure?
2) What happens to the ray of light when it passes from air to glass?
3) What happens to the ray of light when it passes from glass to air?
4) What are the rays AB and CD in the figure called?
5) Define refraction.
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Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
To prevent rusting, a layer of ______ metal is applied on iron sheets.
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What is the reaction called when oxidation and reduction take place simultaneously? Explain with one example.
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Tell the odd one out. Give a proper explanation.
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Explain the construction and working of the following. Draw a neat diagram and label it.
Electric motor
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Match the column in the following table.
| Reactants | Products | Type of chemical reaction |
| BaCl2(aq) + ZnSO4(aq) | H2CO3(aq) | Displacement |
| 2AgCl(s) | FeSO4(aq) + Cu(s) | Combination |
| CuSO4(aq) + Fe(s) | BaSO4↓ + ZnCl2(aq) | Decomposition |
| H2O(l) + CO2(g) | 2Ag(s) + Cl2(g) | Double displacement |
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Write a short note.
Structure of the modern periodic table.
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Write a short note.
Position of isotopes in the Mendeleev’s and the modern periodic table.
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How does the short circuit form?
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Give a scientific reason.
Tungsten metal is used to make a solenoid type coil in an electric bulb.
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Give Scientific reasons.
In the electric equipment producing heat e.g. iron, electric heater, boiler, toaster etc, an alloy such as Nichrome is used, not pure metals.
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Give a scientific reason:
For electric power transmission, copper or aluminium wire is used.
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Give Scientific reason.
In practice, the unit kWh is used for the measurement of electrical energy, rather than joule.
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Identify the figure and give its use.
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Identify the figure and give its use.
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