Page-12
Chemistry
166)The most abundant source of iron is
	eggs		milk
	beans		green vegetables
Answer :
167)Emeralds are made up of
	silica		gold
	berellium		carbon
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168)In human systems, vitamins cannot
	help in metabolising drugs		help in growth
	supply energy		help in digestion
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169)Gasohol is prepared by mixing gasoline and
	ethyl alcohol		methyl alcohol
	butane		tetraethyl lead
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170)For instance energy, athletes take
	vitamin c		glucose
	sucrose		sodium chloride
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171)While sowing seeds, the fertilizer commonly used contains
	potash		calcium
	nitrates		phosphorus
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172)While cooking food, the compounds lost to the maximum extent are
	vitamins		proteins
	fats		carbohydrates
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173)In refrigerators, the liquid used as refrigerant is
	supper cooled water		liquid ammonia
	liquid nitogen		liquid carbon dioxide
Answer :
174)In the manufacturing of bread, the dough rises because of
	the releasing action of carbon dioxide formed during the fermentation process		the capillary action of water in the dough
	the evaporation of water used in kneading the dough		the action of heat in the baking process
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175)The substance present in good amounts in the sea and administered in certain deficiency diseases is
	sodium chloride		iron
	fluorine		iodine
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176)All acid essentially contain the element
	nitrogen		hydrogen
	oxygen		sulphur
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177)Excessive consumption of ethanol causes damage of
	kidneys		lungs
	liver		heart
Answer :
178)In oil wells, oil, water and gas are present in the ascending order of depth -
	gas, oil, water		oil, water, gas
	water, gas, oil		water, oil, gas
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179)The use of gypsum is recomended mainly in soils which are
	saline		alkaline
	acidic		water logged
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180)Drinking soda is
	acidic in nature		basic in nature
	neutral		an oxidising agent
Answer :

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