IIT JEE Practice Question and Answer
8Q: Which elements are most abundant in living organisms? 1715 05b5cc698e4d2b4197774c60e
5b5cc698e4d2b4197774c60e- 1oxygen, nitrogen, carbon, hydrogen, sulfur, and phosphorustrue
- 2carbon, potassium, iron, magnesium, hydrogen, and nitrogenfalse
- 3hydrogen, carbon, calcium, potassium, oxygen, and phosphorusfalse
- 4oxygen, calcium, phosphorus, sodium, hydrogen, and carbonfalse
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Answer : 1. "oxygen, nitrogen, carbon, hydrogen, sulfur, and phosphorus"
Explanation :
Answer: A) oxygen, nitrogen, carbon, hydrogen, sulfur, and phosphorus Explanation: Living organisms often contain trace amounts of several elements, but the most abundant ones are oxygen, carbon, hydrogen, nitrogen, calcium, sulphur and phosphorus.
Q: 5x - 6 = 3x - 8 Solve the above equation. 1714 05b5cc63de4d2b4197774baf3
5b5cc63de4d2b4197774baf3- 12false
- 2-1true
- 3-2false
- 41false
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Answer : 2. "-1"
Explanation :
Answer: B) -1 Explanation: Given 5x - 6 = 3x - 8 5x - 3x = -8 + 6 2x = -2 => x = -1.
Q: What fields did progressives aim to reform? 1714 05b5cc615e4d2b4197774b6bf
5b5cc615e4d2b4197774b6bf- 1workplace conditionsfalse
- 2educationfalse
- 3governmentfalse
- 4All of the abovetrue
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Answer : 4. "All of the above"
Explanation :
Answer: D) All of the above Explanation:
Q: Which one of the following is often called "Twitter of China" ? 1714 05b5cc6c1e4d2b4197774db91
5b5cc6c1e4d2b4197774db91- 1Youkufalse
- 2Sina weibotrue
- 3We chatfalse
- 4Nonefalse
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Answer : 2. "Sina weibo"
Explanation :
Answer: B) Sina weibo Explanation:
Q: What is the first step when supervising detainee operations? 1713 05b5cc622e4d2b4197774b7d3
5b5cc622e4d2b4197774b7d3- Show AnswerHide Answer
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Answer :
Explanation :
The first step is to disarm and secure detainees when supervising detainee operations.
Q: What does the term Jim Crow refer to? 1713 05b5cc64ae4d2b4197774bc51
5b5cc64ae4d2b4197774bc51- 1the civil rights movement of the mid-twentieth centuryfalse
- 2northern whites who sympathized with African Americansfalse
- 3African American politicians during Reconstructionfalse
- 4the system of racial segregation in the South after Reconstructiontrue
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Answer : 4. "the system of racial segregation in the South after Reconstruction"
Explanation :
Answer: D) the system of racial segregation in the South after Reconstruction Explanation:
Q: The percentage of irrigated land in India is about 1712 05b5cc6bae4d2b4197774d7b2
5b5cc6bae4d2b4197774d7b2- 166%false
- 235%true
- 371%false
- 422%false
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Answer : 2. "35%"
Explanation :
Answer: B) 35% Explanation: According to World Bank Indicator India - Land use: Agriculture Land - 1797090 sq. Km (about 60.4%). Forest Area - 677598 sq. Km. (about 22.08%). Agriculture Irrigated land - 35 %.
Q: If 25% of a number is subtracted from a second number, the second number reduces to its four-sixth. What is the ratio of the first number to the second number ? 1711 05b5cc6dee4d2b4197774ea46
5b5cc6dee4d2b4197774ea46- 14:3true
- 22:3false
- 33:2false
- 45:3false
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Answer : 1. "4:3"
Explanation :
Answer: A) 4:3 Explanation: Let the numbers be p & q q-p/4 = 4q/6 => q-4q/6 = p/4 => 2q/6 = p/4 => p/q = 4/3