IIT JEE Practice Question and Answer
8Q: Digitized information can be used by computers. 1664 05b5cc699e4d2b4197774c73d
5b5cc699e4d2b4197774c73d- 1TRUEtrue
- 2FALSE Answer & Explanation Answer:false
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Answer : 1. "TRUE"
Explanation :
Answer: A) TRUE Explanation: TRUE. The computers and electronic devices use digitized information which is easily understood by them. Digitization is the process of converting analog signals or information of any form into a digital format that can be understood by computer systems or electronic devices. The term is used when converting information, like text, images or voices, and sounds, into binary code.
Q: A jogger running at 9 kmph alongside a railway track is 240 metres ahead of the engine of a 120 metre long train running at 45 kmph in the same direction. In how much time will the train pass the jogger ? 1664 05b5cc6dee4d2b4197774ea5b
5b5cc6dee4d2b4197774ea5b- 110 secfalse
- 248 secfalse
- 336 sectrue
- 456 secfalse
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Answer : 3. "36 sec"
Explanation :
Answer: C) 36 sec Explanation: Given speed of jogger = 9 kmph Speed of train = 45 kmphAs they are in same direction, Relative speed = 45 - 9 = 36 kmph = 36x5/18 = 10 m/sDistance = 240 + 120 = 360 mts Time = distance/speed = 360/10 = 36 sec.
Q: What type of bone is a phalanx? 1663 05b5cc632e4d2b4197774b9d0
5b5cc632e4d2b4197774b9d0- 1Short bonesfalse
- 2Jointsfalse
- 3Long bonestrue
- 4None of the abovefalse
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Answer : 3. "Long bones"
Explanation :
Answer: C) Long bones Explanation: The phalanges or a phalanx are/is digital bones in the hands and feet of most vertebrates. In primates, the thumbs and big toes have two phalanges while the other digits have three phalanges. The phalanges are classed as long bones.
Q: What goes up and down the stairs without moving? 1663 05b5cc636e4d2b4197774b9f0
5b5cc636e4d2b4197774b9f0- 1Umbrellafalse
- 2Liftfalse
- 3Stairstrue
- 4All the abovefalse
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Answer : 3. "Stairs"
Explanation :
Answer: C) Stairs Explanation: Those are stairs which goes up and down without moving.
Q: Find the odd one out of the following words ? 1663 05b5cc6d9e4d2b4197774e81b
5b5cc6d9e4d2b4197774e81b- 1cruisetrue
- 2crusadefalse
- 3expeditionfalse
- 4campaignfalse
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Answer : 1. "cruise"
Explanation :
Answer: A) cruise Explanation: Cruise = a sea voyage for pleasure. All other words are related to ‘journey on land, sea with an aim’.
Q: Which of these molecules are polar? Check all that apply. 1663 05b5cc683e4d2b4197774c2d1
5b5cc683e4d2b4197774c2d1- 1SO2false
- 2CH2Cl2false
- 3PCl3false
- 4All the abovetrue
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Answer : 4. "All the above"
Explanation :
Answer: D) All the above Explanation: 1) SO2 2) CH2Cl2 3) PCl3 How to check the given molecules are polar or non polar : If the electronegativity of the two bonded atoms are different then the bond is polar. Although, some molecules contain polar bonds, the molecule may be non-polar. If the polarity of all the bonds present in the molecule are cancel each other then molecule is non-polar. In the given options, SO2 is polar because the dipole moments on the O do not cancel. PCl3 is polar because the P-Cl bonds do not cancel out. CH2Cl2 polar because the C-Cl bonds do not cancel. Hence, in brief, Polar molecules are molecules with net dipole due to the presence of partial positive and partial negative charge. For example, water is a polar molecule that has partial positive and partial negative charge on it. CO2 is a non polar compound. Therefore, all the given options SO2, CH2Cl2 and PCl3 are Polar molecules.
Q: A gland below the bladder and surrounding the urethra? 1663 05b5cc699e4d2b4197774c67a
5b5cc699e4d2b4197774c67a- 1Prostatetrue
- 2Vas deferensfalse
- 3Seminal vesiclefalse
- 4Bulbourethralfalse
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Answer : 1. "Prostate"
Explanation :
Answer: A) Prostate Explanation: The prostate gland is a walnut-sized structure that is located below the urinary bladder in front of the rectum. The prostate gland contributes additional fluid to the ejaculate. Prostate fluids also help to nourish the sperm. The urethra, which carries the ejaculate to be expelled during orgasm, runs through the center of the prostate gland.
Q: Microwave communication uses high-frequency. 1662 05b5cc69be4d2b4197774c7fe
5b5cc69be4d2b4197774c7fe- 1TRUEtrue
- 2FALSE Answer & Explanation Answer:false
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Answer : 1. "TRUE"
Explanation :
Answer: A) TRUE Explanation: Microwaves are high-frequency signals in the 300 MHz to 300 GHz range. This is in contrast to radio signals, which are typically broadcast in all directions. Radio signals operate in the 3 Hz to 300 MHz range. Microwave signals are used for both satellite and ground-based communications.

