Chemistry In Everyday Life Test

Chemistry In Everyday Life

This is chemistry in everyday life Test-04 for CBSE class 12 Chemistry.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Effluents of washing may cause pollution, if
  • A
    they contain soap water
  • B
    they contain dirt
  • C
    they contain disinfectants
  • D
    they contain highly branched detergent molecules
    Correct
2
Narcotic drugs are used in medicinal doses because
  • A
    They kill both the normal and diseased cells
  • B
    They cause acidity
  • C
    They are addictive
    Correct
  • D
    They cause kidney damage
3
Potassium metabisulphite $\left( {{{\text{K}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{5}}}} \right)$ is a food – preservative as it is
  • A
    source of potassium
  • B
    source of minerals
  • C
    source of $SO_2$
    Correct
  • D
    source of benzoic acid
4
Some of the detergents are non – biodegradable because
  • A
    They have a long straight carbon chain difficult to degrade
  • B
    They do not dissolve in water completely
  • C
    They have highly branched carbon chain difficult to degrade
    Correct
  • D
    They kill the bacteria in water which help in degradation
5
Artificial sweetening agents are given to diabetics because
  • A
    They do not get metabolized and hence don’t add calories
    Correct
  • B
    They get easily metabolized in the body
  • C
    They add flavor to sweets
  • D
    They add calories but do not get metabolized in the body
6
Anti – histamines stop allergic reactions by
  • A
    reacting with the allergens like pollen
  • B
    competing with histamine for binding sites of histamine receptor
    Correct
  • C
    reacting with allergy reactions orally
  • D
    inhibiting histamine production
7
Tranquilisers act as antidepressant by
  • A
    Increasing the degradation of noradrenaline
  • B
    Binding itself to noradrenaline
  • C
    Performing the function of neurotransmitters
  • D
    Decreasing the degradation of noradrenaline
    Correct
8
The colloidal soap is precipitated by
  • A
    Adding sodium chloride
    Correct
  • B
    Cooling the colloidal soap solution
  • C
    Boiling the colloidal soap solution
  • D
    Centrifuging the colloidal solution
9
Anionic detergents have
  • A
    A molecule whose anionic part helps in cleansing action
    Correct
  • B
    Only cations in their constitution which take part in cleansing action
  • C
    Only anions in their constitution which take part in cleansing action
  • D
    A molecule whose anionic part does not take part in cleansing action
10
Neurologically active drugs are
  • A
    Tranquilisers and Analgesics
    Correct
  • B
    Antibiotics
  • C
    Antihistaminses
  • D
    Tranquilisers
11
Sodium – bi – carbonate is not a preferred antacid because
  • A
    It is insoluble in water
  • B
    It causes irritation and pain
  • C
    It increases the pH above neutrality
    Correct
  • D
    It is a very mild antacid
12
Analgesics inhibit
  • A
    The synthesis of prostaglandins
    Correct
  • B
    The synthesis of histamine
  • C
    The synthesis of progesterone
  • D
    The synthesis of noradrenaline
13
Soaps are not ${\text{C}}{{\text{a}}^{{\text{2}} + }}and\,{\text{M}}{{\text{g}}^{{\text{2}} + }}$ salts of long chain acids because
  • A
    These salts cannot be obtained by saponification
  • B
    These soaps make the water soft
  • C
    These salts change the pH of water which decreases its cleansing action
  • D
    These salts are insoluble in water
    Correct
14
Enzyme inhibitor drugs
  • A
    Form a strong covalent bond between itself and enzyme
    Correct
  • B
    Allows the substrate to bind with the enzyme at the allosteric site
  • C
    Attaches itself to the substrate changing the shape of the substrate
  • D
    Allow enzymes to bind strongly to the substrate by hydrogen bonding
15
Broad spectrum antibiotic are used to
  • A
    kills both gram – positive and gram – negative bacteria
    Correct
  • B
    kill gram – negative bacteria
  • C
    kill gram – positive bacteria
  • D
    kills only one type of bacteria