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Chemistry |
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196)The type of water which does not lather easily is called is called | |||
hard water | soft water | ||
heavy water | mineral water | ||
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197)The gas used for inflating balloons is | |||
oxygen | helium | ||
nitrogen | hydrogen | ||
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198)Inert gases are | |||
not stable | chemically very active | ||
mixable in water | chemically unreactive | ||
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199)Indigo is used in the | |||
perfumery industry | dyeing industry | ||
pharmaceutical industry | food industry | ||
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200)Linseed cake is used for | |||
feeding cattle | washing purpose | ||
filling crackers | feeding newborns | ||
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201)The process of leaching involves | |||
filtration | evaporation | ||
the removal of dark colours | dissolving out a soluble compound | ||
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202)The main use of magnesia is as a (an) | |||
mild laxative | painkiller | ||
antibiotic | antiseptic | ||
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203)Denatured alcohol | |||
is a very pure form of alcohol | contains coloured impurities | ||
is unfit for drinking as it contains poisonous substances | is sweet to test | ||
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204)Ehtyl alcohol is commonly made unfit for drinking by by the addition of | |||
methyl alcohol | chloroform | ||
potassium chloride | potassium cyanide | ||
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205)Mordants are substances that | |||
have the capacity of increasing the intensity of colour | have a bleaching action | ||
are very hard solids | fix colours on fabrics | ||
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206)The sugar unit present in DNA is | |||
sucrose | glucose | ||
deoxyribose | fructose | ||
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207)Morphine is a drug under the classification | |||
narcotics | antimalarials | ||
antiseptics | antibiotics | ||
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208)The poisonous substance that is the main constituent of tobacco is | |||
aspirin | morphine | ||
nicotine | reserpine | ||
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209)The main active constituent of tea and coffee is | |||
aspirin | morphine | ||
caffeine | nicotine | ||
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210)Containers for carrying strong acids are made of | |||
brass | copper | ||
platinum | lead | ||
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