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Chemistry in Everyday Life Test - 29

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Chemistry in Everyday Life Test - 29
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  • Question 1
    1 / -0
    Assertion : Preservatives are added to food items
    Reason : Preservatives inhibit the growth of microorganisms
    Solution
    A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

    Preservatives increase shelf life of food materials by inhibiting growth of micro organisms and that is the reason why they are added to food items. 
  • Question 2
    1 / -0
    Assertion : Receptors are crucial to body's communication process
    Reason : Receptors are proteins
    Solution
    Option (B) is correct. 
    Receptors are proteins that are crucial to body's communication process. They receives and responds to a neurotransmitter, or other substance. Majority of them are embedded in the cell membrane, in such a way their small part possessing active site projects out of the surface of the membrane and opens on the outer region of the cell membrane.
  • Question 3
    1 / -0
    The principal functional group in aspirin is:

    Solution
    Option (B) is correct. The principal functional group in aspirin is $$-COOH$$
    The common chemical name for aspirin is acetylsalicylic acid. Its systematic name is 2-(acetyloxy)benzoic acid. The chemical formula of aspirin is $$C_9H_8O_4$$ .
    Aspirin is commonly used as a medicinal drug to relieve headaches, minor pains and fevers. It also helps prevents blooding clotting but it higher doses may cause ulcers in stomach and the gastrointestinal tract.

  • Question 4
    1 / -0
    Assertion: All chemical added to food items are called food preservatives.
    Reason: All the chemicals increase the nutritive value of the food.
    Solution
    Various chemicals are added to food. They are called food additives and are flavours and sweeteners, food colours (dyes), fat emulsifiers and stablising agents, flour improvers antistaling agents and bleaches, antioxidants, preservatives and nutritional supplements.
    Thus, only few chemicals added to food items are called food preservatives.
    and Only few chemicals increase the nutritive value of the food.
    Hence, both Assertion and Reason are incorrect.
  • Question 5
    1 / -0
    Assertion : Receptor proteins show selectivity for one chemical messenger over the other
    Reason : Chemical messenger binds to the receptor site and inhibits is natural function
    Solution
    D. Assertion is correct but Reason is incorrect.
    Inhibitor binds to the receptor site and inhibits is natural function. Chemical messengers bind to the receptor site and convey the information to the interior of the cell. 
  • Question 6
    1 / -0
    What change will you observe if you test soap with litmus paper (red and blue)?
    Solution
    Since, soaps are basic in nature, thus, it turns red litmus paper to blue. When blue litmus paper is dipped in soap solution, it remains blue.

    Option A is correct.
  • Question 7
    1 / -0
    In the soap micelles
  • Question 8
    1 / -0

    The soap molecule has a

  • Question 9
    1 / -0
    In all depressions, it is likely that the transmission of ________ is reduced.
    Solution
    Serotonin is reduced when human brain gets into depression. When operating properly, your nervous system has natural checks and balance in form of inhibitory and excitatory neurotransmitters.
  • Question 10
    1 / -0
    Use of chemicals for therapeutic effect is called :
    Solution
    Chemotherapy is a category of cancer treatment that uses the chemical substance. Especially one or more anti-cancer drugs that are given as a part of the standardized chemotherapy regimen.

    Hence, the correct option is $$\text{B}$$
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