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December 25, 2020 - Daily Quiz

1. Which of the following chemicals cause water pollution? 1. Arsenic 2. Copper 3. Zinc Select the correct answer from the following codes (a) Only 1 (b) Only 1 and 2 (c) Only 2 and 3 (d) 1, 2 and 3 2. A train moves past a telegraph post and a bridge 264 m long in 8 seconds and 20 seconds respectively. What is the speed of the train? (a) 69.5 km/hr    (b) 70 km/hr (c) 79 km/hr        (d) 79.2 km/hr
3. The founder of communism is: (a) Plato (b) Karl Marx (c) Mao-Tse-TUNG (d) None of these 4. A, B and C are employed to do a piece of work for Rs. 529. A and C are supposed to finished 19/23 of the work together. How much shall be paid to B? (a) Rs. 82 (b) Rs 92 (c) Rs 300 (d) Rs 437 5. The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere because it absorbs (a) the water vapor of the air and retains its heat (b) Infrared part of solar radiation (c) the ultraviolet part of the solar radiation (d) all the solar radiations ANSWERS 1. (d) Metals like lead, zinc, arsenic, copper, mercury, and cadmium in industrial waste waters adversely affect humans and other animals. arsenic polluted water leads to accumulation of arsenic in the body parts like blood, nails, and hairs causing skin lesions, rough skin, dry and thickening of the skin and ultimately skin cancer. 2. (d)  3. (a)  4. (b)  5. (b) Greenhouse gases absorb long-wave infrared radiations from the earth and emit it again towards the earth. The cycle continues till the earth’s surface has no long wave radiation to emit.  






POSTED ON 25-12-2020 BY ADMIN
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