IIT JEE Practice Question and Answer
8Q: Simplify 413 + 215 + 414 = ? 947 05b5cc6afe4d2b4197774d235
5b5cc6afe4d2b4197774d235- 110 47/60true
- 211 45/73false
- 311 47/36false
- 410 35/48false
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Answer : 1. "10 47/60"
Explanation :
Answer: A) 10 47/60 Explanation: The given equation is in Mixed fraction. Now to solve this type of fractions, 413 + 215 + 414 =?? = 4 + 2 + 4 + 13 + 15 + 14 ? = 10 + 4760? = 104760
Q: Who has Indian gymnast become the first Indian to win an individual medal at the Gymnastics World Cup? 946 05b5cc6a6e4d2b4197774cde3
5b5cc6a6e4d2b4197774cde3- 1Dipa Karmakarfalse
- 2Swati Narangfalse
- 3Veenita Kumarifalse
- 4Aruna Budda Reddytrue
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Answer : 4. "Aruna Budda Reddy"
Explanation :
Answer: D) Aruna Budda Reddy Explanation: Aruna Budda Reddy has created history by becoming the first Indian to win an individual medal at the Gymnastics World Cup in Melbourne, Australia. She clinched a Bronze medal in the Women’s Vault.
Q: What is the four-digit number in which the first digit is 1/3 of the second,the third is the sum of the first and second, and the last is three times the second ? 945 05b5cc71be4d2b4197774f558
5b5cc71be4d2b4197774f558- Show AnswerHide Answer
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Answer :
Explanation :
It is given that the first digit is 1/3 of the second. There are 3 such possibilities 1)1 and 32)2 and 63)3 and 9 Now, the third digit is the sum of the first and second digits.1)1 + 3 = 4 2)2 + 6 = 83)3 + 9 = 12It is clear that option 3 is not possible. So we are left with only two options. Also, the last digit is three times the second, which rules out the second option. Hence, the answer is 1349.
Q: Why are hydrocarbons insoluble in water? 942 05b5cc690e4d2b4197774c474
5b5cc690e4d2b4197774c474- Show AnswerHide Answer
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Answer :
Explanation :
We know that polar substances are soluble in polar solvents and non polar substances are soluble in non-polar solvents only. Here the hydrocarbons are non-polar molecular substances and water is a polar solvent. So water can't dissolve hydrocabons. Hence, as hydrocarbons are non-polar substances, they are insoluble in water as it is a highly polar solvent.
Q: A certain amount earns simple interest of Rs. 2260 after 3 years. Had the interest been 1 % more how much more interest would it have earned ? 942 05b5cc6c1e4d2b4197774db78
5b5cc6c1e4d2b4197774db78- 1Rs. 175false
- 2Rs. 220.75false
- 3Rs. 126false
- 4Can't be determinedtrue
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Answer : 4. "Can't be determined"
Explanation :
Answer: D) Can't be determined Explanation: Here given Interest earned = Rs. 2260 Time = 3 years Rate of interest = ? Principal Amount = ? So, it can't be determined.
Q: One-third of the boys and one-half of the girls of a college participated in a sport. If the number of participating students is 300, out of which 100 are boys. What is the total number of students in the college ? 942 05b5cc6c3e4d2b4197774dc8b
5b5cc6c3e4d2b4197774dc8b- 1550false
- 2575false
- 3625false
- 4700true
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Answer : 4. "700"
Explanation :
Answer: D) 700 Explanation: Let number of boys = B Number of girls = G From the given data, 1B/3 + 1G/2 = 300 But given B/3 = 100 => B = 300 G/2 = 300 - 100 G = 200 x 2 => G = 400 Therefore, total number of students in the college = B + G = 700.
Q: Which of the following is the strongest acid? 941 05b5cc6b7e4d2b4197774d5ec
5b5cc6b7e4d2b4197774d5ec- 1ClCH2COOHfalse
- 2BrCH2COOHfalse
- 3FCH2COOHtrue
- 4ICH2COOHfalse
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Answer : 3. "FCH2COOH"
Explanation :
Answer: C) FCH2COOH Explanation: FCH2COOH is the strongest acid out of all .Since the electron withdrawing inductive effect (-I effect) of the halogens decreases in the order F>Cl> Br> I , therefore the acidic strength of the α- halo acids decreases in the same order. FCH2COOH > ClCH2COOH > BrCH2COOH > ICH2COOH.
Q: Who has been appointed as the first woman Secretary General of the Lok Sabha? 941 05b5cc6bce4d2b4197774d8c5
5b5cc6bce4d2b4197774d8c5- 1Rama Devifalse
- 2Sumitra Mahajanfalse
- 3Anupama Karefalse
- 4Snehlata Shrivastavatrue
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Answer : 4. "Snehlata Shrivastava"
Explanation :
Answer: D) Snehlata Shrivastava Explanation: Snehlata Shrivastava, appointed as the first woman Secretary General of the Lok Sabha. The appointment was made by Lok Sabha Speaker Sumitra Mahajan. Ms. Shrivastava will replace Anoop Mishra, who retired on November 30, 2017. Ms. Shrivastava, a senior civil servant with 35 years of rich and varied administrative experience is a 1982 batch IAS officer from the Madhya Pradesh cadre. Rama Devi holds the distinction of the being the first woman secretary general of the Rajya Sabha.