IIT JEE Practice Question and Answer
8Q: How many seconds will a 800 meter long train moving with a speed of 63 km/hr take to cross a man walking with a speed of 3 km/hr in the direction of the train ? 1536 05b5cc6dde4d2b4197774ea0f
5b5cc6dde4d2b4197774ea0f- 148true
- 252false
- 338false
- 442false
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Answer : 1. "48"
Explanation :
Answer: A) 48 Explanation: Here distance d = 800 mts speed s = 63 - 3 = 60 kmph = 60 x 5/18 m/s time t = 800x1860x5= 48 sec.
Q: What two countries have nearly 50% of global coal reserves? 1536 05b5cc62fe4d2b4197774b99d
5b5cc62fe4d2b4197774b99d- 1Iran & USAfalse
- 2USA & Chinafalse
- 3Russia & USAtrue
- 4Brazil & Russiafalse
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Answer : 3. "Russia & USA"
Explanation :
Answer: C) Russia & USA Explanation: United States and Russia have together almost 400 billion tones. Which represents nearly 50% of world's reserves of coal.
Q: What will come in the place of the (?) in the following number series ? 5 14 45 130 (?) 1182 1535 05b5cc6cae4d2b4197774e095
5b5cc6cae4d2b4197774e095- 1222false
- 2397true
- 3404false
- 4415false
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Answer : 2. "397"
Explanation :
Answer: B) 397 Explanation: The pattern of given series is : 5 14 = (5x3) - 1 45 = (14x3) + 3 130 = (45x3) - 5 (?) = (130x3) + 7 => (?) = 397 1182 = (397x3) - 9 Thus, the missing number is 397.
Q: The law of demand states that other things equal 1535 05b5cc678e4d2b4197774c17e
5b5cc678e4d2b4197774c17e- 1as the price increases, the quantity demanded will decrease.true
- 2as the price increases, the quantity demanded will increase.false
- 3as the price decreases, the demand curve will shift to the right.false
- 4as the price increases, the demand will decrease.false
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Answer : 1. "as the price increases, the quantity demanded will decrease."
Explanation :
Answer: A) as the price increases, the quantity demanded will decrease. Explanation:
Q: Energy is measured in units called 1535 05b5cc658e4d2b4197774bdcd
5b5cc658e4d2b4197774bdcd- 1Newtonsfalse
- 2Wattsfalse
- 3Joulestrue
- 4Ohm/mtrfalse
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Answer : 3. "Joules"
Explanation :
Answer: C) Joules Explanation: Energy is measured in units called Joules. Joule is unit of work or energy in the International System of Units (SI) which is equal to the work done by a force of one newton acting through one metre. 1 Joule = 107 ergs or 0.7377 foot-pounds.
Q: What is the main purpose of state legislatures? 1534 05b5cc699e4d2b4197774c67f
5b5cc699e4d2b4197774c67f- 1to make and pass laws at the state leveltrue
- 2to control the legislation of local governmentsfalse
- 3to provide legislative support for Congressfalse
- 4to challenge the legality of federal lawsfalse
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Answer : 1. "to make and pass laws at the state level"
Explanation :
Answer: A) to make and pass laws at the state level Explanation: Each state in the U.S. has a state legislature. The state legislatures main purpose is to make and pass laws at the state level. An integral part to each state government - indeed where the people of each state are best represented - is the state legislature. State legislatures are the respective representative bodies for the people of each state. The primary responsibility of any state legislature is to design, draft, and vote on bills and laws to govern each state. Bills and laws generally go through several committees prior to being voted on in the entire assembly, through which the bills and laws are changed, amended, or killed altogether.
Q: What will come in place of the question mark (?) in the following number series? 5, 7, ?, 25, 45, 75 1533 05b5cc6cae4d2b4197774dfc0
5b5cc6cae4d2b4197774dfc0- 111false
- 213true
- 315false
- 419false
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Answer : 2. "13"
Explanation :
Answer: B) 13 Explanation: The series given follow the pattern +2, +2+4, +2+4+6, +2+4+6+8, +2+4+6+8+10,... Here ? = 7 + 2 + 4 = 13.
Q: What element is found in all organic compounds? 1533 05b5cc69de4d2b4197774c956
5b5cc69de4d2b4197774c956- 1Hydrogenfalse
- 2Calciumfalse
- 3Nitrogenfalse
- 4Carbontrue
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Answer : 4. "Carbon"
Explanation :
Answer: D) Carbon Explanation: Carbon is found in all organic compounds.

