Q441
Open questionWhere does the oxygen that keeps us alive come from?
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Q442
Open questionIn chemical terms, what are alums used for purifying water for drinking purposes ?
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Q443
Open questionBrown stains in vessels and clothes indicate the presence of high quantities of ________ in water.
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Q444
Open questionIf water smells bad, then that odour can be removed by adding
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Q445
Open questionSurface water is a better source of drinking water because it is poor in
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Q446
Open questionWhich one of the following acids is used in battery ?
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Q447
Open questionWhich of the following is the strongest base in aqueous solution ?
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Q448
Open questionWhich of the following acids serves as an electrolyte in a lead storage battery?
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Q449
Open questionWhich is known as carbolic acid?
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Q450
Open questionCitric acid is present in free form in
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Q451
Open questionSour taste of ‘Coca Cola’ is due to the presence of
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Q452
Open questionAn acid having basicity one is
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Q453
Open questionThe acid present in red ants is
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Q454
Open questionBee sting contains
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Q455
Open questionSweat contains water and ________
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Q456
Open questionThe substance most commonly used as a food preservative is
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Q457
Open questionCurd is sour due to presence of
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Q458
Open questionDrinking soda is
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Q459
Open questionWhich of the following has pH value 7?
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Q460
Open questionMuscle fatigue is caused by the accumulation of :
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