SilverZone iOS Sample Paper Class 9

International Olympiad of Science - iOS’ 22 CLASS 9th SAMPLE QUESTIONS The Actual Question Paper Contains 40 Questions. The Duration of the Test Paper is 50 Minutes. 1. Which one of the following is the acrocentric 7. Which of the following is not a characteristic of pure chromosome? substances? (A) A pure substance contains only one type of particles. (B) A pure substance has definite composition. (C) A pure substance may be homogeneous or heterogeneous. (D) A pure substance has definite melting and boiling point. (A) A (B) B (C) C (D) D 8. Fill in the blanks with the correct combination of terms. 2. Which one of the following graphs shows uniform The disease which lasts for P periods of time is called acceleration? Q disease. R and S are its two examples. A. P-very long, Q-acute, R-common cold, S-dysentery (A) (B) B. P-very short, Q-acute, R-common cold, S-dysentery C. P-very short, Q-acute, R-cancer, S-dysentery D. P-very long, Q-chronic, R-common cold, S-dysentery (C) (D) 9. Which one of the following shows that cathode rays are negatively charged particles? 3. Choose the isobar from the following. (A) Cathode rays produce greenish light on striking the wall of discharge tube (A) 6C12 and 6C14 (B) U235 and 92C238 92 (B) Cathode rays cast shadows of the objects placed in their path (C) H1 and 1C2 1 (D) Ar40 and 20Ca40 18 (C) Cathode rays move the blades of a paddle wheel 4. Humans are classified according to the following placed in their path hierarchy: (D) Cathode rays are deflected towards the positive Animalia → Chordata → Mammalia → Primates → plate of an electric field Hominidae → Homo → Sapiens 10. Classify the following materials into elements, Which category is represented by Primates in the above compounds and mixtures: hierarchy? Methane, granite, blood, sodium, silver, iron, sugar (A) Order (B) Genus (A) Elements: Sodium and silver (C) Kingdom (D) Family Compounds: Methane, Granite, sugar 5. What is the number of water molecules contained in a Mixtures: Iron, blood drop of water weighing 0.12 g? (B) Elements: Sodium, silver, iron, (A) 2.007 × 1021 (B) 4.014 × 1021 Compounds: Methane, sugar Mixtures: Granite, blood (C) 2.007 × 1022 (D) 4.014 × 1022 (C) Elements: Sodium, silver, iron, 6. Calculate the number of molecules of chloroform Compounds: Methane, blood (CHCl3)weighing 0.0239 g (H =1, C=12, Cl=35.5). Mixtures: Granite, sugar (A) 0.2046 × 1017 (B) 1.2046 × 1020 (D) Elements: Methane, silver, iron, Compounds: Sodium, sugar (C) 2.2046 × 1022 (D) 3.1046 × 1021 Mixtures: Granite, blood ANSWERS 1. (B) 2. (A) 3. (D) 4. (A) 5. (B) 6. (B) 7. (C) 8. (B) 9. (D) 10. (B) 14