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1. Ventilation in room is due to __ (a) conduction (b) convection (c) radiation (d) all of these 2. which of the following is a good conductor of heat? (a) rubber (b) wood (c) iron (d) plastic 3. if the given solution does not change the colour of litmus paper, it is_____ (a) an acid (b) a base (c) a neutral (d) none of these 4. An acid reacts with a base to produce___ (a) acid (b) base (c) salt (d) salt and water 5. fruits such as oranges, lemons, etc.contain__________ acid. (a) citric (b) lactric (c) ascorbic (d) acetic

1.(b) convection 2.(c) iron 3.(c) a neutral 4.(d) salt and water 5.(a) citric... View Article