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Chemistry in Everyday Life

Short Answer Type

91.

Why are cimetidine and ranitidine better antacids than sodium hydrogencarbonate or magnesium or aluminium hydroxide?

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92.

Can aspartame be used as artifical sweetner by all people. Explain.

98 Views

93. Why is use of aspartame is limited to cold food and soft drinks?

115 Views

94.

What are artificial sweetening agents? Give two examples.

310 Views

95. What problem arises in using alitame as artificial sweetener?

163 Views

96. How are synthetic detergents better than soaps?

229 Views

Long Answer Type

97.

Explain the following terms with suitable examples:
(i) cationic detergents,
(ii) anionic detergents and
(iii) neutral detergents.

1151 Views

Short Answer Type

98.

What are biodegradable and non-biodegradable detergents? Give one example of each.

295 Views

99.
Why do soaps not work in hard water?

Hard water contains calcium and magnesium ions. These ions form insoluble calcium and magnesium soaps respectively when soaps are dissolved in hard water.

These insoluble soaps separate as scum in water and are useless as cleansing agent. Therefore, soaps are not work in hard water.

274 Views

100.

Can you use soaps and synthetic detergents to check the hardness of water?

149 Views

Previous Year Papers

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99. Why do soaps not work in hard water?

99.
Why do soaps not work in hard water?