Please select a subject first
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Answer the following question:
State the four blocks of the modern periodic table based on the electronic configuration of elements.
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When the positive charge on an ion increases or the negative charge on them decreases it is called as _______.
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_______ is used for electrical measurements.
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In hypermetropia human eye _______.
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Ionic compounds are electrically _______.
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Focal length : metre : : power of lens : _______
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: Concave lens : : 
: ______Find the odd one out and give its explanation.
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Write chemical formula for rust.
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Galvanometers are used for electrical measurements.
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Hypermetropia can be corrected using concave lens of proper focal length.
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The power of the magnifying glass depends on the distance of the magnifying glass from object.
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Electrolysis is used to obtain pure metal from impure metal.
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Write scientific reason.
Farsightedness, this defect can be corrected by using convex lens.
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Explain the factors affecting the rate of chemical reaction with example.
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Explain the following reaction with their balanced chemical equation.
Hydrogen sulphide reacts with sulphur dioxide.
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Explain the following reaction with the balanced equation.
Aluminium reacts with dil hydrochloric acid
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Explain the following reaction with the balanced equation.
Reaction of zinc with dil hydrochloric acid
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Write a short note on the galvanometer.
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