Class 10 Science Objective Test

Av anti - 1 0 B 0 5 + 1 0 B 0 6 C ombined Obj test - Our E nv t. + Mg mt of Natural R es - Set A Tes t Code: X-S-19-16 Set A INST RUCT IONS 1. T his paper has 20 questions. 2. All questions are compulsory. 3. Each question has four options, out of which ONLY ONE is correct. 4. Each question carries 1 marks. 5. T he paper carries no negative marking. Maximum T ime: 30 Minutes Total Marks: 20 Name:_____________________________ Roll Number:__________________ SECT ION I-BIOLOGY Q1. Identify the wrong statement about biodegradable waste. A) It has comparatively low shelf life B) It undergo biological process D ) It takes part in biogeochemical cycle C) It requires more than centuries to degrade. Q2. In the table given below, some information regarding the trophic levels in a food chain of an ecosystem is provided. T rophic level Energy in trophic level (Joules) A B C D B ased on the information, selec t the option w hic h represents the c orrec t food c hain. A) B) C) D) Q3. What is the original source of the energy which flows through a food chain? A) carbon dioxide B) glucose C) oxygen D ) sunlight Q4. How much energy will be available to frog in the food chain comprising of hawk, snake, frog, grasshopper, grass and the source of energy would be sunlight of energy? A) B) C) D ) Avanti Learning Centres Pvt Ltd. All rights reserved. Page - 1 / 4

Av anti - 1 0 B 0 5 + 1 0 B 0 6 C ombined Obj test - Our E nv t. + Mg mt of Natural R es - Set A Q5. In the given food chain, humans form the topmost consumers. Which among the given food chains will make the efficient use of the solar energy? A) Both 1 and 4 B) Both 2 and 3 C) Both 3 and 4 D ) Both 2 and 1 Q6. A food chain comprising hawk, snake, frog, grasshopper and grass. If high amount of pesticide is sprayed on the grass, which organism of the given trophic level do you think would be most affected? A) Organism in the first trophic level B) Organism of the trophic level who has C) Organism at the top most trophic level direct contact with the grass D ) All the organisms will be equally affected Q7. T he energy decreases as the trophic level goes higher but the level of toxic substances increases as it moves to higher trophic level. Why does the concentration of toxic substances increases as the tropic level increases? A) T he concentration of toxic substances in higher trophic level increases because it relies on more than one such preys B) T he concentration of toxic substances in higher trophic level increases as the toxin spread throughout the body ceasing metabolic activity C) T he concentration of toxic substances in higher trophic level increases because when the lower trophic level (prey) consumes D D T containing food, its metabolic activity ceases and the concentration of toxin increases in their body. D ) T he concentration of toxic substances increases because as the trophic level progresses, the siz e of the prey inc reases thereby the lev el of c onc entration inc reases Q8. D uring the day time when the sun is bright, the of the water in a small pond with plenty of submerged green plants may rise whereas, at night, the of the water in small ponds may fall because A) T he concentration of dissolved oxygen in water affects the B) T he concentration of carbon dioxide in water affects the C) Change in the intensity of sunlight affects the of the pond water D ) All of the above Q9. We do not clean ponds or lakes but a well aerated aquarium needs to be cleaned because I. Aquarium lacks soil II. Aquarium lacks oxygen III. Aquarium lacks decomposers IV. High accumulation of large concentration of ammonia in the water A) All of the above B) Option D ) Option and C) Option and Avanti Learning Centres Pvt Ltd. All rights reserved. Page - 2 / 4

Av anti - 1 0 B 0 5 + 1 0 B 0 6 C ombined Obj test - Our E nv t. + Mg mt of Natural R es - Set A Q10. What will happen if you kill all the organisms of one trophic level? A) T he organisms from the higher trophic level would be over populated B) T he organisms from lower trophic level will starve to death C) T he organisms from lower trophic level will consume the population of its lower level in large amount making it extinct D ) D epletion of any trophic level will not affect food chain Q11. T he important message conveyed by the 'Chipko Movement' is A) to involve the community in forest conservation efforts. B) to ignore the community in forest conservation efforts. C) to cut down forest trees for developmental activities D ) to order destruction of trees in forests by the G overnment agencies Q12. T he three s to save the environment are A) Reserve, Reduce, Recycle C) Reserve, Reuse, Recycle B) Reuse, Reserve, Reduce D ) Reduce, Recycle, Reuse. Q13. G iven below are a few statements related to biodiversity. Pick the options that correctly describe the concept of biodiversity I. Biodiversity refers to the different species of flora and fauna present in an area II. Biodiversity refers to only the flora of a given area III. Biodiversity is greater in a forest IV. Biodiversity refers to the total number of individuals of a particular species living in an area A) All of the above B) Only C) Both and D ) Both and . Q14. In our country, there are attempts to increase the height of several existing dams like Tehri and Almati, dams across Narmada. Choose the correct statements among the following that are a consequence of raising the height of dams. I. Terrestrial flora and fauna of the area is destroyed completely II. D islocation of people and domestic animals living in the area III. Valuable agricultural land may be permanently lost IV. It will generate permanent employment for people A) All of the above B) Both and C) I, II and III D ) and Q15. Sana was reading about rainwater harvesting and its benefits. She came to learn about different types of structures that are built in different states to conserve rainwater. Select the correct option which represents such structures. A) Bundhis B) Khadins C) Both A and B D ) Compost pit Q16. T here are two important fuels and both of which are extracted from deep inside the earth. Fuel is a thick, dark, strong smelling liquid whereas fuel is a flammable black solid. Combustion of both the fuels produces products, and . Both and attack breathing system of humans and are mainly responsible for causing acid rain. I. What are fuel and fuel ? II. Name C, F and E A) Petroleum, coal, , , B) Tar, Natural gas, , , C) Methane, coal, D ) Coal, ethane, , Avanti Learning Centres Pvt Ltd. All rights reserved. Page - 3 / 4

Av anti - 1 0 B 0 5 + 1 0 B 0 6 C ombined Obj test - Our E nv t. + Mg mt of Natural R es - Set A Q17. T he of the river water sample was found to be . T he most likely reason for this would be the waste being discharged in the river from vinegar manufacturing company. A) baking soda manufacturing factory B) sodium carbonate manufacturing factory. C) alcohol manufacturing company. D) Q18. A man bought a device which could cook pulses, vegetables and rice without using any fuel like wood, coal, kerosene or , etc. T his device did not work at night. It also took a lot of time for cooking. T he device is A) Solar cooker B) Induction coil C) Solar panel D ) Stove Q19. Which of the following is not a direct stakeholder in the management (or conservation) of forests? A) T he people who have paper mills in the B) T he people who run the forest department vicinity. D ) T he people who live in urban areas C) T he people who campaign for the conservation of forests Q20. Which gas is formed due to combustion of coal and petroleum in the presence of insufficient air? A) B) C) D ) Avanti Learning Centres Pvt Ltd. All rights reserved. Page - 4 / 4