General Science 9th Class English Medium Chapter 2 Online Test With Answers

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General Science 9th Class English Medium Chapter 2 Online Test

Sr. # Questions Answers Choice
1 Oxygen and nitrogen react to form. Nitric Acid Nitrogen oxide Nitrogen peroxide Nitrate
2 Teh process of converting atompspheric nitrogen to useable from is called. Nitrogen cycle. Carbon cycle Nitrogen fixation Water cycle
3 The form of carbon which is not crystalline is. Charcoal Graphite Bucky Ball Diamond
4 It is an important constituent of DNA and RNA our body Iron Chlorine Fluorine Phosphorus
5 An essential component of haemoglobin sodium Neon iron Aluminium
6 The process which increases the temperature in the temperatureis called Photosynthesis Oxidation Greenhouse effect Evaporation
7 Low iodine availability in humans causes the disease Goiter Cancer Tuberculosis Cholera
8 The density of ice at o°C is & nbsp 0.918g/cm3 0.618g/cm3 0.718g/cm3 0.8/8 g/cm3
9 The process which increases the amount of carbon dioxide in air is called photosynthesis respiration oxidation vaporization
10 The process which loops the amount of nitrogen constant in air is nitrogen fixation nitrogen cycle oxidation photosynthesis
11 The percentage of nitrogen in air is 76% 77% 78% 79%
12 The compounds consisting of Amino acids are called carbohydrate Fast Proteins organic compounds
13 The process by which green plants manufacture their food is respiration photosynthesis oxidation nitrogen fixation
14 The most common element in the universe is oxygen hydrogen nitrogen iron
15 The sun almost entirely consists to the element oxygen iron phosphorus hydrogen
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