IIT JEE Practice Question and Answer

Q: I have keys but no locks, I have space but no room. You can enter but can't go outside. What am I? 1174 0

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Answer :
Explanation :

I am Keyboard. A Keyboard has keys of letters, space button and enter button.

Q: The hot holding temperature for potentially hazardous foods must be 1604 0

  • 1
    not less than 60 deg
    Correct
    Wrong
  • 2
    less than 60 deg
    Correct
    Wrong
  • 3
    less than 5 deg
    Correct
    Wrong
  • 4
    None of the above
    Correct
    Wrong
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Answer : 1. "not less than 60 deg"
Explanation :

Answer: A) not less than 60 deg Explanation: Potentially hazardous foods are foods that might contain food poisoning bacteria and are capable of supporting growth of these bacteria or formation of toxins to levels that are unsafe for consumers, if the foods are not stored at correct temperatures. Toxins are poisonous chemicals produced by some types of bacteria. The food can be left at room temperature until it reaches 60 deg C because food-poisoning bacteria will not multiply at 60 deg C or above. However, do not leave food cooling at room temperature unless you are sure that the temperature of the food is still at least above 60 C.

Q: What is the first step when supervising detainee operations? 1570 0

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Answer :
Explanation :

The first step is to disarm and secure detainees when supervising detainee operations.

Q: Which of the following elements is a metalloid? 1525 0

  • 1
    arsenic
    Correct
    Wrong
  • 2
    boron
    Correct
    Wrong
  • 3
    antimony
    Correct
    Wrong
  • 4
    All of the above
    Correct
    Wrong
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Answer : 4. "All of the above"
Explanation :

Answer: D) All of the above Explanation: A metalloid is any chemical element which has properties in between those of metals and nonmetals, or that has a mixture of them. The six commonly recognised metalloids are boron, silicon, germanium, arsenic, antimony, and tellurium.

Q: What name is given to the bond between water molecules? 1431 0

  • 1
    Polar
    Correct
    Wrong
  • 2
    Polar covalent
    Correct
    Wrong
  • 3
    Hydrogen
    Correct
    Wrong
  • 4
    None of the above
    Correct
    Wrong
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Answer : 3. "Hydrogen"
Explanation :

Answer: C) Hydrogen Explanation: The name given to the bond between water molecules is a hydrogen bond. These bonds occur between the slightly negative oxygen of one water molecule and the slightly positive hydrogen of another water molecule. Hydrogen bonding gives water special physical properties.   The differences in electronegativity between hydrogen and oxygen lead to an unequal sharing of electrons. Electronegativity measures how strongly an atom attracts electrons. Oxygen, with its higher electronegativity, pulls on the shared electrons more, giving the oxygen atom a partial net negative charge. The shared electrons spend less time with the hydrogen atoms; therefore, the hydrogen regions of water have partial positive charges.

Q: Which statement best compares a line and a point? 2180 0

  • 1
    A point has no dimension and a line has one dimension.
    Correct
    Wrong
  • 2
    A line can have line segments on it whereas a point cannot be on any line segment.
    Correct
    Wrong
  • 3
    point is a location whereas a line has several planes located on it
    Correct
    Wrong
  • 4
    A line can lie on a plane whereas a point cannot lie on a plane.
    Correct
    Wrong
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Answer : 1. "A point has no dimension and a line has one dimension."
Explanation :

Answer: A) A point has no dimension and a line has one dimension. Explanation: A point has no dimension and a line has one dimension is the statement that best compares a line and a point.

Q: The food and drug administration sets standards for 3105 0

  • 1
    product labeling
    Correct
    Wrong
  • 2
    traffic safety
    Correct
    Wrong
  • 3
    advertising
    Correct
    Wrong
  • 4
    the environment
    Correct
    Wrong
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Answer : 1. "product labeling"
Explanation :

Answer: A) product labeling Explanation: The FDA is responsible for protecting and promoting public health through the control and supervision of food safety, tobacco products, dietary supplements, prescription and over-the-counter pharmaceutical drugs (medications), vaccines, biopharmaceuticals, blood transfusions, medical devices, electromagnetic radiation emitting devices (ERED), cosmetics, animal foods & feed and veterinary products.

Q: What was the goal of the temperance movement? 1750 0

  • 1
    No alcohol
    Correct
    Wrong
  • 2
    No tobacco
    Correct
    Wrong
  • 3
    Both A & B
    Correct
    Wrong
  • 4
    None of the above
    Correct
    Wrong
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Answer : 1. "No alcohol"
Explanation :

Answer: A) No alcohol Explanation: The temperance movement of the late nineteenth and early twentieth centuries was an exception in many ways: "Temperance" refers to the moderate consumption of alcoholic beverages.   However, in the context of the temperance movement, the term usually indicated complete abstinence, which means drinking no alcohol at all. The goal of the temperance movement in the United States was to make the production and sale of alcohol illegal. Supporters believed that prohibiting alcohol would solve a number of society's problems, making people safer, healthier, and more productive.

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