Question 81 : A solid of density d is dropped in a liquid of density D, if d>D then,
1. Solid will completely sink
2. Solid will completely float
3. Solid will partially sink
4. None of the mentioned
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Question 82 : What is the density of a substance of mass 10 grams and volume 5 liters?
1. 2 kg/m³
2. 20 kg/m³
3. 200 kg/m³
4. 2000 kg/m³
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Question 83 : Which of the following is not a unit of density?
1. Kg/m³
2. N/m³
3. N.s²/m⁴
4. g/cm³
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Question 84 : What are the number of molecules of water in CuSO₄•5H₂O, if the weight of oxygen in it is 36 grams?
1. 3.25 X 10²³
2. 5.25 X 10²³
3. 7.52 X 10²³
4. 9.52 X 10²³
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Question 85 : What are the number of moles of hydrogen in NH₄[Cr(SCN)₄(NH₃)₂] if the weight of nitrogen in it is 49 grams?
1. 3.5
2. 5
3. 7
4. 10
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Question 86 : What are the number of moles of nitrogen in 274 grams of (NH₄)₂Ce(NO₃)₆?
1. 16
2. 8
3. 6
4. 4
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Question 87 : What are the number of moles of Hydrogen in 158 grams of Ammonium Bicarbonate?
1. 5
2. 10
3. 15
4. 20
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Question 88 : What are the number of atoms of chlorine in 250.5 grams of Cl₂O₆?
1. 1.806 X 10²⁴
2. 2.408 X 10²⁴
3. 9.033 X 10²³
4. 6.022 X 10²³
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Question 89 : Which of the following has the same number of moles as in 398 grams of CuSO₄?
1. 2 grams of hydrogen
2. 40 grams of oxygen
3. 35 grams of nitrogen
4. 58.5 grams of Sodium chloride
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Question 90 : Calculate the number of moles in 369 grams of CaOCl₂?
1. 1
2. 2
3. 3
4. 4
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