- Which of the following has minimum ignition temperature? ?->(Show Answer!)

1. - Which of the following has minimum ignition temperature?

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MCQ-> The passage below is accompanied by a set of six questions. Choose the best answer to each question. During the frigid season... it's often necessary to nestle under a blanket to try to stay warm. The temperature difference between the blanket and the air outside is so palpable that we often have trouble leaving our warm refuge. Many plants and animals similarly hunker down, relying on snow cover for safety from winter's harsh conditions. The small area between the snowpack and the ground, called the subnivium... might be the most important ecosystem that you have never heard of.The subnivium is so well-insulated and stable that its temperature holds steady at around 32 degree Fahrenheit (0 degree Celsius). Although that might still sound cold, a constant temperature of 32 degree Fahrenheit can often be 30 to 40 degrees warmer than the air temperature during the peak of winter. Because of this large temperature difference, a wide variety of species...depend on the subnivium for winter protection.For many organisms living in temperate and Arctic regions, the difference between being under the snow or outside it is a matter of life and death. Consequently, disruptions to the subnivium brought about by climate change will affect everything from population dynamics to nutrient cycling through the ecosystem.The formation and stability of the subnivium requires more than a few flurries. Winter ecologists have suggested that eight inches of snow is necessary to develop a stable layer of insulation. Depth is not the only factor, however. More accurately, the stability of the subnivium depends on the interaction between snow depth and snow density. Imagine being under a stack of blankets that are all flattened and pressed together. When compressed, the blankets essentially form one compacted layer. In contrast, when they are lightly placed on top of one another, their insulative capacity increases because the air pockets between them trap heat. Greater depths of low-density snow are therefore better at insulating the ground.Both depth and density of snow are sensitive to temperature. Scientists are now beginning to explore how climate change will affect the subnivium, as well as the species that depend on it. At first glance, warmer winters seem beneficial for species that have difficulty surviving subzero temperatures; however, as with most ecological phenomena, the consequences are not so straightforward. Research has shown that the snow season (the period when snow is more likely than rain) has become shorter since l970. When rain falls on snow, it increases the density of the snow and reduces its insulative capacity. Therefore, even though winters are expected to become warmer overall from future climate change, the subnivium will tend to become colder and more variable with less protection from the above-ground temperatures.The effects of a colder subnivium are complex... For example, shrubs such as crowberry and alpine azalea that grow along the forest floor tend to block the wind and so retain higher depths of snow around them. This captured snow helps to keep soils insulated and in turn increases plant decomposition and nutrient release. In field experiments, researchers removed a portion. of the snow cover to investigate the importance of the subnivium's insulation. They found that soil frost in the snow-free area resulted in damage to plant roots and sometimes even the death of the plant.The purpose of this passage is to
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MCQ-> Read the following information carefully and answer the questions given below: Following are the conditions for short listing candidates for the post of Marketing officer for Payment bank. The candidate to be called for interview must (i) be a graduate in Science, i.e. B.Sc, with minimum 55% marks. (ii) have at least 3 years experience in selling/marketing (iii) have participated in debating or drama or sports at the intercollegiate level onwards. (iv) have secured minimum 60% marks in the Written Examination (WE) (v) be ready to deposit Rs 10,000 as security deposit. However, in case of a candidate who fulfils all these criteria except (a) (iv) above, but has secured minimum 60% at B.Sc, may be referred to the Chief Manager (b) (i) above, but has passed M.Sc, i.e. Post Graduation in Science, with minimum 50% marks, may be referred to DGM Based on these criteria and information provided below, decide the course of action in each case. You are not to assume anything. If the data provided is not adequate given course of action, your answer will be ‘data inadequate’. All the candidates given below fulfill the criterion for age. Mark Answer If the decision is as follows a: Selection for Interview b: Not to be selected c: Data inadequate d: Refer to Chief Manager (C.R) e: Refer to the DGM(C.R)Deepika is a 26 years girl having obtained 60% marks in Post-Graduation. I.e M.sc,. 53 % and 64 % in B.sc and W.E . respectively .Deepika has worked as sales executive for three and half years.She has obtained many prizes in intercollegiate events in debating and ready to deposit Rs 10,000 as security deposit.
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