91. Coal is heated in presence of air to a temperature of about __________ °C, while determining its ash content for proximate analysis.
92. During its calorific value determination by bomb calorimeter, coal is combusted by
93. Orsat apparatus
94. Orsat apparatus is meant for
95. 'Fat coals' are those coals which have very high
96. __________ has the widest inflammability limit (explosion limit) of all the gases.
97. Presence of force moisture in coal is most disadvantageous during its
98. Producer gas containing least amount of tar is produced by the
99. Coke oven gas constitutes mainly of
100. Which of the following is a poisonous fuel gas?
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