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Q. No.If 50 ml of water is added to 100 ml of 1 M NaCl (aq) solution, then the final molarity of the solution will be:
1.
0.5 M
2.
0.25 M
3.
0.67 M
4.
1.5 M
Subtopic: Concentration Based Problem |
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Level 2: 60%+
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The statement, "If two elements can combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element are in the ratio of small whole numbers," was given by:
1. Gay Lussac
2. Dalton
3. Antoine Lavoisier
4. Joseph Proust
1. Gay Lussac
2. Dalton
3. Antoine Lavoisier
4. Joseph Proust
Subtopic: Introduction |
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In the following reaction:
\(4HCl + MnO_2 \rightarrow 2H_2O + MnCl_2 + Cl_2\)
Amount(in g) of manganese dioxide that reacts with 7.3 g of HCl is: (Atomic weight of Mn is 55)
1. 0.23
2. 5.85
3. 4.35
4. 5.18
\(4HCl + MnO_2 \rightarrow 2H_2O + MnCl_2 + Cl_2\)
Amount(in g) of manganese dioxide that reacts with 7.3 g of HCl is: (Atomic weight of Mn is 55)
1. 0.23
2. 5.85
3. 4.35
4. 5.18
Subtopic: Equation Based Problem |
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The prefix peta used in the SI system is:
| 1. | \(10^{15}\) | 2. | \(10^{-15} \) |
| 3. | \(10^{18}\) | 4. | \(10^{-18} \) |
Subtopic: Introduction |
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The mass of a 2.5 mL solution (the density of the solution is 2.15 g/mL) in the correct significant figures is:
| 1. | 5375 × 10–3 g | 2. | 5.4 g |
| 3. | 5.38 g | 4. | 53.75 g |
Subtopic: Introduction |
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NEET - 2022
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What is the total volume of gases present after the completion of the reaction between 150 cm3 of F2 and 100 cm3 of Cl2?
3F2 (g) + Cl 2(g) → 2ClF3 (g)
(assuming the reaction occurs at constant temperature and pressure)
1. 250 cm3
2. 150 cm3
3. 350 cm3
4. 200 cm3
3F2 (g) + Cl 2(g) → 2ClF3 (g)
(assuming the reaction occurs at constant temperature and pressure)
1. 250 cm3
2. 150 cm3
3. 350 cm3
4. 200 cm3
Subtopic: Limiting Reagent | Introduction |
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For a given hydrocarbon, 11 moles of O2 is used and produces 4 moles of H2O. The formula of hydrocarbon is:
1. C11H8
2. C9H8
3. C11H16
4. C6H14
1. C11H8
2. C9H8
3. C11H16
4. C6H14
Subtopic: Equation Based Problem |
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JEE
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Given the chemical combustion of carbon:
C + O2 → CO2(g)If you mix 12 grams of Carbon with 48 grams of Oxygen gas, If the volume of CO2 gas produced at STP is t litres, calculate the final value of 2t:
(Given: Molar volume at STP = 22.4 L/mol)
2. 42
3. 45
4. 54
Subtopic: Concentration Based Problem |
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How much carbon disulphide is needed to yield 64 grams of SO2 in the following reaction?
CS2 + 3O2 → CO2 + 2SO2
1. 38 g
2. 57 g
3. 76 g
4. 114 g
Subtopic: Equation Based Problem |
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The number of moles of water present in a spherical water droplet of radius 1.0 cm are:
[Given: Density of water in the droplet = 1.0 g cm–3]
1. \( \dfrac{\pi}{18} \)
2. \( \dfrac{2\pi}{27} \)
3. \(24\pi\)
4. \( \dfrac{2\pi}{9} \)
[Given: Density of water in the droplet = 1.0 g cm–3]
1. \( \dfrac{\pi}{18} \)
2. \( \dfrac{2\pi}{27} \)
3. \(24\pi\)
4. \( \dfrac{2\pi}{9} \)
Subtopic: Introduction |
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