2-Methylalkene: A branched alkene, with a methyl group connected to the second carbon atom in the main carbon chain. Density of hydrocarbons and linear alcohols and acids, Boiling points of hydrocarbons, alcohols and acids, Melting points of hydrocarbons, alcohols and acids, Autoignition temperature and flash point of different hydrocarbons. What is combustion? Question 8. Substances which have very low ignition temperature and can catch fire easily are called The list of uses of various alkenes like ethene, propene etc., is given below. Such arguments posit that a new generation of Africans free of colonial thought and mindset is emerging and that this is driving economic transformation. * 99th percentile, (i.e. Does magnesium produce heat and light during its combustion? The causes are as of yet unclear, but education is certainly a factor. Alkyl groups bonded to the sp2 hybridised carbon atoms of alkenes affect the stability of the double bond. Yes, Ammonium Hydroxide is a base just like pure ammonia. Wood is an example of _________ fuel. Recent decades have brought efforts at various degrees of regional economic integration. Water, sand. Combustible gases or a mixture of combustible gases are called gaseous fuels. Focus on its features and how it is used in different aspects. Physical Properties of Ammonium Hydroxide: Specific gravity - It is typically 0.9 and actually depends on the strength of the solution. Understand why it is basic from its structural features. Question 2. No. Foreign aid has been an integral part of African economic development since the 1980s. as tools for assessing the health benefits of such mitigation measures. [48] The private sector spending alone equals state capital expenditure, though the majority is focused on ICT infrastructure investments. The rate of return on investment in Africa is currently the highest in the developing world. [137][138][139] Nigeria is currently the largest manufacturer of cement in Sub-saharan Africa. [147] The banking sector has been experiencing record growth, among others due to various technological innovations. 7.1.2 Access to clean fuels and technologies. The fire will ultimately extinguish if it doesnt get the required supply of air. Required fields are marked *. The aggregate quantity in use and storage shall not exceed the quantity listed for storage. Comparing the calorific values of coal and petrol, state which fuel is better. Only emails and answers are saved in our archive. Question 12. Used in the manufacturing of rayon and other Textiles as well. The WHO Global air quality guidelines offer global guidance on thresholds and limits for key air pollutants that pose health risks. 3-Methylalkane: A branched alkane, with a methyl group connected to the third carbon atom in the main carbon chain. Alkylcycklopentane: A monosubstituted cyclopentane with one branching via the attachment of one alkyl group on one carbon of the cyclohexane ring, with the general formula CnH(2n+1)C5H9. levels. Although these subsidies and tariffs have been gradually reduced, they remain high. Any three characteristics of a good fuel are following: Question 21. The further an additional intermolecular mass, the higher the boiling point. ", "The World Factbook Central Intelligence Agency", The African Economy: Policy, Institutions and the Future, The Age of the Dragon: China's Conquest of Africa, Holding the door open for multinationals to extract Africa's wealth, Africa in the World Economy: the national, regional and international challenges, IMF World Economic Outlook (WEO) September 2003 Public Debt in Emerging Markets. Combustion is a physical process. New Holland Publishers. Spontaneous combustion happens when substances catch fire spontaneously without any heat and happen on their own. During combustion, generally, _________ and _________ energies are produced. [145] East African countries like Uganda also produce motorcycles for the domestic market. The WHO co-sponsored Pan European Programme on Transport Health and Environment (PEP), has built a model of regional, Member State, and multisectoral cooperation for mitigation of air pollution and other health impacts in the transport sector, as well When Ammonia dissolves in water it results in the formation of ammonia hydroxide. [59] Others such as J. D. Fage and David Eltis have rejected this view. For example, the burning of a matchstick, gas stove. Wood pollutes air very much and using wood as a fuel would also lead to deforestation on a large scale. Question 1. The substance that undergoes combustion is said to be 7. Answer: Many other minerals are also present in quantity. Sarita wondered why petrol cant be used as a fuel for household activity though its calorific value is high. Then pour vinegar into the dish of baking soda. A type of combustion in which the substance suddenly catches fire without the supply of heat or friction externally is called spontaneous combustion; e.g., forest fires. Why? How carbon-di-oxide helps to control fires. Define spontaneous combustion. Alkanes are called paraffins because they have a very low affinity with a general reagent. At 15.6 C (60.1 F), a saturated solution has a density of 0.88 g / ml and contains 35.6 percent ammonia by mass, 308 grams of ammonia per liter of solution, and molarity of about 18 mol / L. The molarity of the saturated solution decreases at higher temperatures, and the density increases. This is close to the IMF's global average for low-income developing nations, which is around 2% of 2020 GDP over a one-year period from the start of the COVID-19 pandemic. (c) LPG has a calorific value of _________ kJ/kg. Write in brief about the reasons of forest fires. * Note that some of the substances have a melting point above 20C, and that the given densities then are given for solid state. Why isnt hydrogen gas used as a domestic or industrial fuel, although it has a very high calorific value? Answer: It is a weak base as it does not associate completely with dissolution in water. lightning if strikes forest trees or areas may lead to forest fires. False ", "Nigeria overtakes South Africa as biggest cement manufacturer in SSA", "Aliko Dangote Launches Nigeria's biggest cement plant", "Industrial hub: Why more companies are moving to Ogun", "Ogun State: Nigeria's new Industrial hub", "How manufacturing motorcycles can boost Uganda's economy", "Africa's banking industry set for impressive growth: study", "India to Step Up Trade and Investment in Africa", "China to maintain aid, investment in Africa 'regardless of financial crisis', "Sending money home to Africa is cheaper than it was, but still higher than anywhere else", "Angola oil tiger plans investment in Europe", "Minnesota: Investment opportunities abound in South Africa", "Liberian Leaders Predict Boom for Poor West African Country", "Could West Africa launch a single currency? For example Petrol, kerosene, diesel etc. Trade between African states accounts for only 11% of Africa's total commerce as of 2012, around five times less than in Asia. Google use cookies for serving our ads and handling visitor statistics. 5. True Kerosene [72] One of the biggest critics of the aid development model is economist Dambisa Moyo (a Zambian economist based in the US), who introduced the Dead Aid model, which highlights how foreign aid has been a deterrent for local development. Name the chemical process in which a substance reacts with oxygen to give out heat. Question 4. It is typically used for comparing the efficiency of internal combustion engines with a shaft output.. From this grass, very soon, it spreads to the whole forest. 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What type of process is combustion? It can also cause irritation in the lungs if inhaled. [45][49] Critics of colonialism charge colonial rule with injuring African pride, self-worth and belief in themselves. [29][30] Almost two-thirds of Banks surveyed tightened lending rules, but more than 80% expanded their use of restructuring or loan moratoriums. (c) As globalization has heightened the competition for foreign aid among developing countries, Africa has been trying to improve its struggle to receive foreign aid by taking more responsibility at the regional and international level. (b) Liquefied Petrol Gas Synthetic fuel or synfuel is a liquid fuel, or sometimes gaseous fuel, obtained from syngas, a mixture of carbon monoxide and hydrogen, in which the syngas was derived from gasification of solid feedstocks such as coal or biomass or by reforming of natural gas.. Common ways for refining synthetic fuels include the FischerTropsch conversion, [better source needed] Flame is a region where the burning or combustion of gaseous substances take place. (b) Africa's economy: A glimmer of light at last? Which of the following are required essentially for producing fire? 2. The idea of a single currency union across Africa has been floated, and plans exist to have it established by 2020, though many issues, such as bringing continental inflation rates below 5 percent, remain hurdles in its finalization. What is the ignition temperature of phosphorus? (d) magnesium sulphate, Question 3. [101] The result of this is that the global price of such products is continually reduced until Africans are unable to compete, except for cash crops that do not grow easily in a northern climate. [83] Ghana and Kenya, for example, have developed markets within the region for construction materials, machinery, and finished products, quite different from the mining and agriculture products that make up the bulk of their international exports. Economists who subscribe to this theory believe that poorer regions must break their trading ties with the developed world in order to prosper.[62]. In such situations, soda-acid fire extinguisher does not work as it contains water or uses water to take off fire by cooling down the place. [15] In 2013, Africa was home to seven of the world's fastest-growing economies. Observe the foaming reaction. Global warming is defined as the increase in the temperature of the atmosphere of the earth. [154], Remittances from the African diaspora and rising interest in investment from the West will be especially helpful for Africa's least developed and most devastated economies, such as Burundi, Togo and Comoros. p. 19. Other post-colonial scholars, most notably Frantz Fanon continuing along this line, have argued that the true effects of colonialism are psychological and that domination by a foreign power creates a lasting sense of inferiority and subjugation that creates a barrier to growth and innovation. WHO is custodial agency for 3 air pollution-related Sustainable Development Goals indicators: WHO develops and produces air quality guidelines recommending exposure limits to key air pollutants (indoor and outdoor). The Impact of Agricultural Trade Policies on Developing Countries", "Farm Subsidies: Devastating the World's Poor and the Environment", "Inter Press Service | News and Views from the Global South", "Targeted agricultural investments will slash poverty in Africa", "Private sector invests N1.7 trillion in Nigeria's agricultural sector Jonathan", "Govt targets agricultural boom Daily Monitor", "African Union support crucial for agricultural progress", "Though making 'very good progress,' Africa still faces challenges, says UN official", "African researchers: Tick vaccines can stop use of dangerous pesticides", "As Africa looks for clean power, interest in nuclear grows", "Africa strives to rebuild its domestic industries", "Resources Boom Represents Development Potential in Africa Mining Technology", "Namibia: Congo Copper Giant to Invest in Country", "ECONOMY-MAURITIUS: Textile Manufacturing Goes Green and Clean", "Market for renewable energy expected to boom in Africa", "Innoson cars will sell for N1 million in 2014 Chukwuma", "Local vehicles manufacturing INNOSON/FG pact commendable", "CHUKWUMA: BUSINESSMAN WHO DEFIED THE LIMITS", "Innoson Vehicle Manufacturing granted license to export its vehicles", "I Couldn't Meet Cut-off Mark to Study Engineering Innoson", "Zinox Introduces Tablet Range of Computers, Plans Commercial Launch", "Will the new automotive policy give us affordable made-in-Nigeria car?
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