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Notes of acid, bases and salts class 10

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Noteswala 2020     Acid, Bases and Salts   The taste of the food is due to presence of acids and bases in them. Acids Acids is defined as the one which produces hydrogen ions in water.  For Example , Sulphuric Acid, Hydrochloric Acid etc. They give sour taste. Acids turn blue litmus to red. This is used as confirmation test for the presence of acid. When acids react with metals, gases are evolved. Reactions with Acids 1. Reaction of Acid with Metal Acid + Metal → Salt + Hydrogen gas Mg + H 2  SO 4  → H 2  + Mg SO 4 2. Reaction of Acid with Carbonates Na 2  CO 3  (s) + 2 HCl (aq) → 2NaCl (aq) + H 2 O(l) + CO 2 (g) 3. Reaction of Acid with Bicarbonates NaHCO 3  (s) + HCl (aq) → NaCl(aq) + H 2 O (l) + CO 2  (g) Similarity between Acids and Bases Both acids and base react with water. They produce ions in water Both acids and bases acts as electrolytes, so are good conductors of electricity. Both of them changes the colour of the litmus paper. Classification of Acids Acids are classified as
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Notes of magnetic effect of electric current class 10

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  Noteswala 2020 Magnetic effect of Electric current Any substance that attracts iron and iron like objects is defined as magnet. When a wire carries an electric current, it behaves as a magnet. Properties of Magnet Every magnet has north and south poles. Same poles repel each other and unlike poles attract each other. A freely suspended magnet will align itself in north south direction, north facing north of the magnet and south facing south of the magnet. Characteristics of Field Lines Field lines arise from north pole and end into south pole of the magnet. They are closed curves. Field lines never intersect each other. Direction of magnetic field lines inside the magnet is from south to north. Magnetic Field of a Bar Magnet Hold the thumb, forefinger and middle finger of right hand at right angles to each other. If the forefinger is in direction of magnetic field and the thumb points in the direction of motion of conductor, than the direction of induced current is indicated by middl
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