Class : VIII
Subject : Science ...
Chemistry, 11.03.2021 14:00 itsyagirlbella
Class : VIII
Subject : Science
I .Choose the correct 10 X 1 = 10
1. The process of loosening of the soil is called
(a) Tilling (b) harvesting (c) Spraying (d)Weeding
2. Alcohol is produced with the help of
(a) Sodium chloride (b)Yeast (c) nitrogen (d) Carbondioxide
3. Which fibre is used as a artificial wool?
(a) Acrylic (b) Rayon (c) Nylon (d) Cotton
4. The metal which is liquid at room temperature
(a) Sodium (b) Bromine (c) Calcium (d)Mercury
5. Which one is not a coal product?
(a) Coal tar (b) coal gas (c) Lime (d)Coke
6. Name the process undertaken by plant for preparing their own food
(a) Industrialisation (b) Photosynthesis (c) stealing (d)Sterilisation
7. A friction is a
(a) non – contact force (b) contact force (c) Magnetic force
(d) Electrostatic force
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8. The voice box is also called as
(a) stomach (b) Heart (c) Larynx (d)Mouth
9. Beam of light striking the reflecting surface is called
(a) reflected ray (b) incident ray (c) normal ray (d) none of these
10. The force exerted by the earth to pull the object towards itself is called
(a) Electrostatic force (b) gravitational force (c) muscular force
(d) contact force answer all please I mark you brainlest
Answers: 3
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Ineed to find the answer of this question because i dont understand it
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If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?
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