Question

pls answer as soon as possible answer both pls or attach the answer​

Answer 1

Answer:

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Explanation:

Q2. A)

1) In an empty house, there is no sound absorbers present such as furnitures, curtains etc. Also, if the room is closed, the sound cannot escape from the room. Thus, the sound goes through multiple reflections from the rigid walls of a closed and empty room without the reflections of the sound being absorbed. Hence, the intensity of reflections do not fade which would have faded if the room was not empty (has sound absorbers). Due to this the intensity of reverberation is higher in a closed and empty room.

2) Carbon forms a large number of compounds because of the following reasons:

(a) Tetravalency: Carbon atoms readily form covalent bonds with the other atoms.

(b) Catenation: Two carbon atoms readily form covalent bonds and this bond is more stable than the bonds formed by the other elements.

(c) Carbon atoms have varying bond order and hybridisation that is it can form double or triple bonds. 

(d) The electronegativity of the carbon atom is average.