IIT JEE Practice Question and Answer
8Q: Which statement is true of all atoms that are anions? 2531 05b5cc64de4d2b4197774bc7a
5b5cc64de4d2b4197774bc7a- 1The atom has fewer protons than does a neutral atom of the same element.false
- 2The atom has more protons than electrons.false
- 3The atom has more neutrons than protons.false
- 4The atom has more electrons than protons.true
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Answer : 4. "The atom has more electrons than protons."
Explanation :
Answer: D) The atom has more electrons than protons. Explanation: Anions are atoms or radicals (groups of atoms), that have gained electrons. Since they now have more electrons than protons, anions have a negative charge.
Q: Cup is to Coffee as Bowl is to 2530 05b5cc6afe4d2b4197774d206
5b5cc6afe4d2b4197774d206- 1Souptrue
- 2Foodfalse
- 3Forkfalse
- 4Mugfalse
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Answer : 1. "Soup"
Explanation :
Answer: A) Soup Explanation: Cup : Coffee :: Bowl : Soup Because Coffee goes into a Cup and Soup goes into a Bowl where Food is a general thing and Mug is an other utensil. So, Cup is to Coffee as Bowl is to Soup.
Q: In a class of 50 students M is eighth from top. H is 20th from bottom. How many students are there between M and H? 2529 05b5cc7f3e4d2b41977751ebb
5b5cc7f3e4d2b41977751ebb- 122true
- 223false
- 324false
- 4can't be determinedfalse
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Answer : 1. "22"
Explanation :
Answer: A) 22 Explanation: M is 8th from the top. H is (50 - 20 + 1 =) 31 st from the top. Number of students between M and H = (31 - 8- 1=)22
Q: If 15% of x = 20% of y, then x:y is ___? 2525 05b5cc6bde4d2b4197774d929
5b5cc6bde4d2b4197774d929- 14:3true
- 25:4false
- 34:5false
- 43:4false
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Answer : 1. "4:3"
Explanation :
Answer: A) 4:3 Explanation: Given 15% of x = 20% of y => 15x = 20y => x/y = 20/15 => x : y = 4 : 3
Q: Only if Sheela is happy, then she does not go to work. 2524 05b5cc761e4d2b4197774fd20
5b5cc761e4d2b4197774fd20- 1Sheela is not happy and she goes to work.true
- 2Sheela is happy and she does not go to workfalse
- 3Sheela is not happy and she does not go to work.false
- 4Sheela is happy and she goes to work.false
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Answer : 1. "Sheela is not happy and she goes to work."
Explanation :
Answer: A) Sheela is not happy and she goes to work. Explanation: The event of "Sheela is not going to work" happens only when the event "Sheela is happy" happens. Also, if the event "Sheela is happy" does not happen, then the event "Sheela is not going to work" will not happen. In other words, if it is true that Sheela is not happy, then it means that Sheela is going to work.
Q: Which of the following is not soluble in water? 2522 05b5cc690e4d2b4197774c422
5b5cc690e4d2b4197774c422- 1copper(II) hydroxidetrue
- 2sodium chloridefalse
- 3silver nitratefalse
- 4potassium sulfatefalse
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Answer : 1. "copper(II) hydroxide"
Explanation :
Answer: A) copper(II) hydroxide Explanation: Sodium chloride: The solubility rules tell you that all halides are soluble with the exception of those formed with siver, mercury, and lead ions. Since this is not the case here, sodium chloride will be soluble. Silver nitrate: It is soluble because all nitrates are soluble, without exception. Potassium sulfate: It is soluble because all sulfates are soluble with the exception of those formed with silver, calcium, barium, mercury, lead, and strontium ions. Copper (II) hydroxyde: It is insoluble because all hydroxides are insoluble with the exception of those formed with alkali metal ions and barium.
Q: The top and bottom of a tower were seen to be at angles of depression 30° and 60° from the top of a hill of height 100 m. Find the height of the tower ? 2522 15b5cc72ce4d2b4197774f79c
5b5cc72ce4d2b4197774f79c- 142.2 mtsfalse
- 233.45 mtsfalse
- 366.6 mtstrue
- 458.78 mtsfalse
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Answer : 3. "66.6 mts"
Explanation :
Answer: C) 66.6 mts Explanation: From above diagramAC represents the hill and DE represents the tower Given that AC = 100 m angleXAD = angleADB = 30° (∵ AX || BD ) angleXAE = angleAEC = 60° (∵ AX || CE) Let DE = h Then, BC = DE = h, AB = (100-h) (∵ AC=100 and BC = h), BD = CE tan 60°=AC/CE => √3 = 100/CE =>CE = 100/√3 ----- (1) tan 30° = AB/BD => 1/√3 = 100−h/BD => BD = 100−h(√3)∵ BD = CE and Substitute the value of CE from equation 1 100/√3 = 100−h(√3) => h = 66.66 mts The height of the tower = 66.66 mts.
Q: Which of the following statements about Woodrow Wilson is true? 2521 05b5cc60de4d2b4197774b613
5b5cc60de4d2b4197774b613- 1He wanted to place strict government controls on corporations.true
- 2He overturned discriminatory laws against African Americans.false
- 3He advocated eliminating the income tax.false
- 4He opposed reforms to the banking system.false
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Answer : 1. "He wanted to place strict government controls on corporations."
Explanation :
Answer: A) He wanted to place strict government controls on corporations. Explanation: Woodrow Wilson was one of the major "Progressives" in American government and so 'He wanted to place strict government controls on corporations.'

