IIT JEE Practice Question and Answer
8Q: Ticks and mites are actually 1488 05b5cc65ee4d2b4197774be0c
5b5cc65ee4d2b4197774be0c- 1Arachnidstrue
- 2Insectsfalse
- 3Myriapodsfalse
- 4Crustaceansfalse
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Answer : 1. "Arachnids"
Explanation :
Answer: A) Arachnids Explanation:
Q: 6 : 18 :: 4 : ? 1487 05b5cc6b5e4d2b4197774d520
5b5cc6b5e4d2b4197774d520- 114false
- 26false
- 316false
- 48true
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Answer : 4. "8"
Explanation :
Answer: D) 8 Explanation: Here the given number analogy follows two patterns that, 6 18 --> 6 x 3 4 12 --> 4 x 3 OR 6 18 ----> 6x6/2 = 18 4 8 ----> 4x4/2 = 8 As 12 is not available in the options, 8 is correct answer.
Q: What is the conjugate base of H2O? 1486 05b5cc63de4d2b4197774baf9
5b5cc63de4d2b4197774baf9- 1NH3+false
- 2OH-true
- 3H2Ofalse
- 4All the abovefalse
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Answer : 2. "OH-"
Explanation :
Answer: B) OH- Explanation: A conjugate acid, is a species formed by the reception of a proton (H+) by a base—in other words, it is a base with a hydrogen ion added to it. On the other hand, a conjugate base is what is left over after an acid has donated a proton during a chemical reaction. Hence, a conjugate base is a species formed by the removal of a proton from an acid. Because some acids are capable of releasing multiple protons, the conjugate base of an acid may itself be acidic. Represented as the following chemical reaction: Acid + Base ⇌ Conjugate Base + Conjugate Acid The water molecule is the conjugate acid of the hydroxide ion after the latter received the hydrogen proton donated by ammonium. On the other hand, ammonia is the conjugate base for the acid ammonium after ammonium has donated a hydrogen ion towards the production of the water molecule. We can also refer to OH- as a conjugate base of H2O, since the water molecule donates a proton towards the production of NH+4 in the reverse reaction, which is the predominating process in nature due to the strength of the base NH3 over the hydroxide ion.
Q: What is the difference between the compound interests on Rs. 5000 for 11⁄2 years at 4% per annum compounded yearly and half-yearly? 1486 05b5cc6ace4d2b4197774d08c
5b5cc6ace4d2b4197774d08c- 1Rs. 1.80false
- 2Rs. 2.04true
- 3Rs. 3.18false
- 4Rs. 4.15false
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Answer : 2. "Rs. 2.04"
Explanation :
Answer: B) Rs. 2.04 Explanation: Compound Interest for 1 1⁄2 years when interest is compounded yearly = Rs.(5304 - 5000) Amount after 11⁄2 years when interest is compounded half-yearly Compound Interest for 1 1⁄2 years when interest is compounded half-yearly = Rs.(5306.04 - 5000) Difference in the compound interests = (5306.04 - 5000) - (5304 - 5000)= 5306.04 - 5304 = Rs. 2.04
Q: Rajeev's age is four more than the age of Shilpa. The age of Shilpa can be obtained by subtracting four times her age 4 years ago from the four times her age after 4 years. What was Rajeev's age before 4 years ? 1485 05b5cc6c7e4d2b4197774dea5
5b5cc6c7e4d2b4197774dea5- 136 yearsfalse
- 228 yearsfalse
- 332 yearstrue
- 440 yearsfalse
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Answer : 3. "32 years"
Explanation :
Answer: C) 32 years Explanation: Let Shilpa's present age is p years According to question, p = 4(x+4) – 4(x–4) p = 4x+16 – 4x+16 p = 32 Shilpa's present age = 32 years Rajeev is four years older than Shilpa => Shilpa's present age = Rajeev's age 4 years before. => Rajeev's age 4 years before = 32 years.
Q: How many weekends in a year? 1485 05b5cc6afe4d2b4197774d244
5b5cc6afe4d2b4197774d244- 152false
- 253false
- 3103false
- 4104true
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Answer : 4. "104"
Explanation :
Answer: D) 104 Explanation: In normal we have 104 Weekend Days. We know that a Each normal year has 365 days or 52 weeks plus one day, and each week has two weekend days, which means there are approximately 104 weekend days each year. Whereas in a leap year we have 366 days it adds one more day to the year. And what makes the change is the starting day of the year.
Q: In the expansion phase of a business cycle 1483 05b5cc662e4d2b4197774be7a
5b5cc662e4d2b4197774be7a- 1economy moves from peak to troughfalse
- 2economy moves from contraction to peakfalse
- 3economy moves from trough to peaktrue
- 4economy moves from trough to troughfalse
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Answer : 3. "economy moves from trough to peak"
Explanation :
Answer: C) economy moves from trough to peak Explanation: Business cycles are identified as having four distinct phases: 1. Expansion, 2. Peak, 3. Contraction, and 4. Trough. Expansion is the phase of the business cycle when the economy moves from a trough to a peak. It is a period when the level of business activity surges and gross domestic product (GDP) expands until it reaches a peak. A period of expansion is also known as an economic recovery. An expansion is characterized by increasing employment, economic growth, and upward pressure on prices.
Q: What is true about certificates of deposit? 1483 05b5cc63de4d2b4197774bb00
5b5cc63de4d2b4197774bb00- 1the money has to remain in the account for a specified period of timetrue
- 2they are the most liquid account availablefalse
- 3they offer lower interest rates than savings accountsfalse
- 4All the abovefalse
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Answer : 1. "the money has to remain in the account for a specified period of time"
Explanation :
Answer: A) the money has to remain in the account for a specified period of time Explanation: A certificate of deposit (CD) is a savings certificate with a fixed maturity date, specified fixed interest rate and can be issued in any denomination aside from minimum investment requirements. CD's are generally issued by commercial banks

