Chemistry-Objective Related Question Answers
576. Water acts as?
neutral
577. The purest water on earth is?
Rain water
578. The poor conductor of electricity?
Water
579. The bonding of the molecules in water is called?
Polar bonding
580. Temporary hardness of water is due to the presence of?
bicarbonates of calcium and magnesium
581. Permanent hardness of water is due to the presence of?
sulphates and chlorides of calcium and magnesium
582. Temporary hardness of water can be removed by?
repeated boiling or adding lime
583. Permanent hardness of water can be removed by adding?
sodium carbonate or by distillation or by exchange method
584. Carbon dioxide was discovered by?
Joseph Black
585. The percentage of Carbon dioxide in atmosphere?
0.03%
586. Gaswhich causesglobal warming?
Carbon dioxide
587. Solid carbon dioxide is known as?
Dry Ice
588. The substance used as cooling agent?
Dry Ice
589. The substance known as Card Ice?
Dry Ice
590. The sewage material in Aeroplanes are turned into solid by?
Blue ice
591. The gas released during the process of fermentation?
Carbon dioxide
592. The gas used as fire extinguisher?
Carbon dioxide
593. The gas present in soda water?
Carbon dioxide
594. The gas caused for green noose effect?
Carbon dioxide
595. The gas absorbed at the time of photosynthesis?
Carbon diuxide
596. The gas emitted when the flour and toddy become sour?
Carbon dloxlde
597. The gas let out when the: lime stone is heated?
Carbon dioxide
598. The product released when the carbon is burned in air .?
Carbon dioxide
599. Compound of Nitrogen and Hydrogen is?
Ammonia
600. Ammonia gas was discovered by ?
Fritz Haber
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