Science Questions Secretariat Assistant - 2018 SUDHEESH RAGHAVAN unacademy
21. The gas in a balloon of volume 2 L is released into an empty vessel of volume 7 L. What will be the volume of the yas? (A) 2L (C) 9L (B) 7L (D) 5L 22. Identify the element which shows variable valency. (A) Helium (C) Sodium (B) Magnesium (D) ron 23. The speed of chemical reaction between gases increases with increase in pressure due to an increase in (A) Number of molecules (C) Concentration (B) Volume (D) Distance between molecules
24. The scientific principle behind the working of a transformer is (A) Mutual induction (C) Rectification (B) Transmission (D) Amplification 25. The outermost shell contigurat ion of an element is 4s 4p. The period to which the element belongs is (A) 5 (C) 3 (B) 8 (D) 4 26. Nucleus is discovered by (A) Robert Brown (C) Bowman (B) Golgi (D) Fountain
27. Relationship between sea anemone and hermit crab is (A) Symbiosis (C) Commensalism (B) Mutualism (D) None of these 28. Acid rain is due to (A) O, and dust (C) SO, and CO (B) (D) SO, and NO2 CO, and CO 29. Green house ffect is mainly due to (A) CH (C) CF (B) So, (D) CO, 30. Which of the following is a water soluble Vitamin? (A) Calciferol (C) Ascorbic acid (B) Tocoferol (D) Phyloquinone
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