(Question)
Q: What happens when alkanes are mixed with oxygen at room temperature? Read this paragraph and choose the correct option from the provided answers: Neither positive ions nor negative ions are attracted to a nonpolar molecule. In fact, the alkanes undergo so few reactions that they are sometimes called paraffins, from the Latin parum affinis, meaning "little affinity. " Two important reactions that the alkanes do undergo are combustion and halogenation. Nothing happens when alkanes are merely mixed with oxygen (O2) at room temperature, but when a flame or spark provides the activation energy, a highly exothermic combustion reaction proceeds vigorously. For methane (CH4), the reaction is as follows:. Choices: - single replacement - redox - combustion - no reaction A:
(Answer)
no reaction

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Q: Coal, oil and natural gas are types of what formed from the remains of once living organisms? Read this paragraph and choose the correct option from the provided answers: Coal, oil and natural gas are all fossil fuels formed from the remains of once living organisms. Choices: - living fossils - fossil compounds - crop fuels - fossil fuels A:
(Answer)
fossil fuels

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Q: How much exercise should a person ideally get during a single day? Read this paragraph and choose the correct option from the provided answers: Physical activity is an important part of balanced eating. It helps you use up any extra Calories in the foods you eat. You should try to get at least an hour of exercise just about every day (see Figure below ). Exercise has many health benefits in addition to balancing the energy in food. For example, it strengthens the bones and muscles and may improve your mood. Choices: - six hours - three hours - fifteen minutes - hour A:
(Answer)
hour