Question
Which of the following is an example of an olfactory
indicator?Solution
Olfactory indicators are substances that change their smell in the presence of acids or bases. Onion is an olfactory indicator because its characteristic smell diminishes in the presence of a base but remains unchanged in an acidic medium. This property helps distinguish between acidic and basic solutions through the sense of smell. Other examples of olfactory indicators include vanilla extract and clove oil, which behave similarly. In contrast, turmeric, China rose, and methyl orange are visual pH indicators that change color rather than smell in different pH environments.
The Polymerisation of which of the following is used in the manufacturing of polythene in industry?
What is dehydration?Â
What is heavy water?
In the synthesis of aspirin (acetylsalicylic acid) from salicylic acid, which reagent is used?
Which radioactive element is used in heart pacemakers?
The device that converts AC into DC is:
On a clean glass plate, a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because:
Which of the following statement regarding Rutherford nuclear model is NOT correct?
Which of the following organic compounds undergo nucleophilic substitution reaction most easily?
Ethane gas has a slightly _____ taste.
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