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Chemistry in Everyday Life Test - 34

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Chemistry in Everyday Life Test - 34
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  • Question 1
    1 / -0
    Which of the following are the chemical substances that decrease anxiety?
    Solution

    A tranquilizer is a drug, that acts on the central nervous system and is used to calm a person and decrease anxiety, or help a person to sleep. Often called depressants because they suppress the central nervous system and slow the body down, they are used to treat mental illness as well as common anxiety and sleeplessness. Available only by prescription, they can cause dependence and certain ones can easily be abused.

  • Question 2
    1 / -0
    Which of the following is used in the management of psychoses and neuroses?
    Solution
    A tranquilizer is a drug, that acts on the central nervous system and is used to calm, decrease anxiety, or help a person to sleep. Often called depressants because they suppress the central nervous system and slow the body down, they are used to treat mental illness as well as common anxiety and sleeplessness. Available only by prescription, they can cause dependence and certain ones can easily be abused.
  • Question 3
    1 / -0
    Which of the following plays important role in controlling movement, motivation and cognition?
    Solution
    Dopamine is a neurotransmitter that helps control the brain's reward and pleasure centers. Dopamine also helps regulate movement and emotional responses, and it enables us not only to see rewards, but to take action to move toward them. Dopamine deficiency results in Parkinson's Disease, and people with low dopamine activity may be more prone to addiction. 
  • Question 4
    1 / -0
    An example of food preservative is:
    Solution
    An example of food preservative is sodium benzoate $$C_6H_5COONa$$. 

    It is safely used in limited amounts and is metabolized by conversion to hippuric acid $$C_6H_5CONHCH_2COOH$$, which is ultimately excreted into urine.

    It is bacteriostatic and fungistatic under acidic conditions. Thus, it prevents the growth of microorganisms in food materials.

    Option A is correct.
  • Question 5
    1 / -0

    The food is kept at low temperatures in a refrigerator because it:

    Solution
    Bacteria do not grow at low-temperatures. So, food is stored at low-temperatures in refrigerator.
  • Question 6
    1 / -0
    Ammonium hydroxide is found in:
    Solution
    $$\bullet$$ Composition of lime water is $$Ca(OH)_2$$
    $$\bullet$$ Composition of soap is Sodium stearate $$(C_{17}H_{35}COO^{\circleddash})$$ and $$Na^{\oplus}$$
    $$\bullet$$ Milk of magnesia has composition of $$Mg(OH)_2$$
    $$\bullet$$ Window cleaner has Ammonium hydroxide $$(NH_4OH)$$
  • Question 7
    1 / -0
    A synthetic material used for washing clothes, even when water is hard is:
    Solution
    Detergent is used for both surface activity and cleansing action. Detergents are made of Alkylbenzene sulfonates, which help cleansing action in hard water. 

    Synthetic detergents are cleansing agents which have all the properties of soaps, but which actually do not contain any soap. These can be used both in soft and hard water as they give foam even in hard water.

  • Question 8
    1 / -0
    An effective antacid contains:
    Solution
    Antacids are used to neutralize the acid level of the stomach. If a person experiences indigestion or heart burn. Antacid contain an alkaline reactant usually sodium bicarbonate, calcium carbonate, or Aluminium/ Magnesium hydroxide. 
  • Question 9
    1 / -0
    It is found in phosphorus and nitrogen
    Solution
    Nitrogen and phosphorous are nutrints that are natural parts of aquatic ecosystems.Nitrogen is also most abundant element in the air we breath nitrogen and phosphorous support the growth of a lgee and aquatic plants,which prouide food and habbit for fish and smaller organisma that line in water.







  • Question 10
    1 / -0
    Sodium hydroxide is found in:
    Solution
    When esters are treated with sodium hydroxide (an alkali) it forms alcohol and sodium salt of carboxylic acid. This reaction is known as the saponification reaction because it is used in the preparation of soap. Soaps are sodium or potassium salts of long-chain carboxylic acids. So we can say that sodium hydroxide is found in soap.
    $$\bullet$$ Lime water has $$Ca(OH)_2$$
    $$\bullet$$ Milk of magnesia has $$Mg(OH)_2$$
    $$\bullet$$ Window cleaner has $$NH_4OH$$
    Hence, option $$D$$ is correct.
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