IIT JEE Practice Question and Answer
8Q: Consumers that eat both plants and animals are 1607 05b5cc642e4d2b4197774bb68
5b5cc642e4d2b4197774bb68- 1Carnivoresfalse
- 2Herbivoresfalse
- 3Omnivorestrue
- 4Tertiary consumersfalse
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Answer : 3. "Omnivores"
Explanation :
Answer: C) Omnivores Explanation: An omnivore is an animal that eats food from both plants and animals. Animals that eat other animals are called carnivores. Carnivores that eat herbivores are called secondary consumers, and carnivores that eat other carnivores are called tertiary consumers.
Q: Which formula represents a nonpolar molecule? 1607 05b5cc67be4d2b4197774c216
5b5cc67be4d2b4197774c216- 1H2Ofalse
- 2CF4true
- 3HClfalse
- 4H2Sfalse
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Answer : 2. "CF4"
Explanation :
Answer: B) CF4 Explanation: You have to consider three things. 1. First, are the bonds polar? Look at differences in electronegativity and if it is >0.5, bonds are polar. 2. Second, does the molecule have unshared electron pairs? If so, they generally lead to a polar molecule. 3. Third, is the molecule symmetric? If so, then although the bonds may be polar, the symmetry cancels out the individual bond polarity and the molecule is non polar. CF4 follows all the rules above and has a symmetric distribution of charge, making it nonpolar. The others all have asymmetric charge distributions. Hence, CF4 represents a Non-polar molecule.
Q: LCD of 12 and 18 1607 05b5cc6b8e4d2b4197774d66b
5b5cc6b8e4d2b4197774d66b- 136true
- 242false
- 312false
- 46false
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Answer : 1. "36"
Explanation :
Answer: A) 36 Explanation: LCD is nothing but Lowest or Least Common Denominator Here LCD of 12 and 18 means LCD of two fractions with denominators 12 and 18 respectively. Therefore, LCM of 12 & 18 = 6 x 3 x 2 = 36 How to calculate LCD :: The lowest common denominator or least common denominator (LCD) is the least common multiple (LCM) of the denominators of a set of fractions.
Q: Find the Missing number in the given Series ? 2, 3, 6, 15, ? , 157.5 1607 05b5cc6bce4d2b4197774d8ac
5b5cc6bce4d2b4197774d8ac- 187false
- 278.5false
- 356.5false
- 445true
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Answer : 4. "45"
Explanation :
Answer: D) 45 Explanation: Here given 2, 3, 6, 15, ? , 157.5 2 x 1.5 = 3 3 x 2 = 6 6 x 2.5 = 15 15 x 3 = 45 45 x 3.5 = 157.5 Therefore, the missing number is 45
Q: Which player has won the Gold Medal at World Badminton Championship 2017 ? 1606 05b5cc6c9e4d2b4197774df79
5b5cc6c9e4d2b4197774df79- 1Nozomi Okuharatrue
- 2Saina Nehwalfalse
- 3Carolina Marinfalse
- 4P V Sindhufalse
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Answer : 1. "Nozomi Okuhara"
Explanation :
Answer: A) Nozomi Okuhara Explanation:
Q: Ozone is concentrated in the 1606 05b5cc6abe4d2b4197774d001
5b5cc6abe4d2b4197774d001- 1Stratospheretrue
- 2Tropospherefalse
- 3Ionospherefalse
- 4Mesospherefalse
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Answer : 1. "Stratosphere"
Explanation :
Answer: A) Stratosphere Explanation: Most of the ozone in the atmosphere is found in the layer of stratosphere, which begins about 10.16 kilometers (6.10 miles) above Earth's surface and extends up to about 50 kilometers (31 miles) altitude.
Q: Where do arteries carry blood? 1606 05b5cc655e4d2b4197774bd64
5b5cc655e4d2b4197774bd64- 1Hearttrue
- 2Lungsfalse
- 3Tissuesfalse
- 4Brainfalse
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Answer : 1. "Heart"
Explanation :
Answer: A) Heart Explanation: Arteries carry oxygenated blood away from the heart to the tissues, except for pulmonary arteries, which carry blood to the lungs for oxygenation (usually veins carry deoxygenated blood to the heart but the pulmonary veins carry oxygenated blood as well).
Q: Rs. 50000 is divided into two parts One part is given to a person with 10% interest and another part is given to a person with 20 % interest. At the end of first year he gets profit 7000 Find money given by 10% ? 1606 05b5cc711e4d2b4197774f3b9
5b5cc711e4d2b4197774f3b9- 1Rs. 20,000false
- 2Rs. 10,000false
- 3Rs. 30,000true
- 4Rs. 40,000false
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Answer : 3. "Rs. 30,000"
Explanation :
Answer: C) Rs. 30,000 Explanation: Let first part is 'K' and second part is 'L' then K + L = 50000---------eq1Total profit = profit on x + profit on y7000 = (K x 10 x 1)/100 + (L x 20 x 1)/10070000 = K + 2L-----------------------------------eq270000 = 50000 + Lso L = 20000 then K = 50000 - 20000 = 30000first part on 10% is = Rs.30000

