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Q. No.5.0 g of NaOH is dissolved in water to get a 450 mL solution. What volume of the solution is required to prepare 500 mL of 0.1 M NaOH solution?
1. 180 mL
2. 150 mL
3. 130 mL
4. 210 mL
Subtopic: Concentration Based Problem |
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Level 2: 60%+
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A hydrocarbon has a molar mass of 84 g/mol and contains 85.8% carbon by mass. How many hydrogen atoms are present in one molecule of this hydrocarbon?
1. 8
2. 10
3. 12
4. 14
1. 8
2. 10
3. 12
4. 14
Subtopic: Moles, Atoms & Electrons |
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Level 2: 60%+
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The mass ratio of ethylene glycol (62 g/mol) required to make (500 ml, 0.25 M) and (250 ml, 0.25 M) solutions is:
| 1. | 1:1 | 2. | 1:2 |
| 3. | 2:1 | 4. | 4:1 |
Subtopic: Concentration Based Problem |
79%
Level 2: 60%+
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Consider a mixture of CH4 and C2H4 having a volume of 16.8 L at 273 K and 1 atm. It undergoes combustion to form CO2 with a total volume of 28 L at the same temperature and pressure.
If the enthalpies of combustion of CH4 and C2H4 are -900 kJ/mol and -1400 kJ/mol respectively, then the magnitude of heat released on combustion of the given mixture in kJ is:
1. 875 kJ
2. 925 kJ
3. 945 kJ
4. 900 kJ
If the enthalpies of combustion of CH4 and C2H4 are -900 kJ/mol and -1400 kJ/mol respectively, then the magnitude of heat released on combustion of the given mixture in kJ is:
1. 875 kJ
2. 925 kJ
3. 945 kJ
4. 900 kJ
Subtopic: Equation Based Problem |
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Level 2: 60%+
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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 |
76%
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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 |
80%
Level 1: 80%+
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Subtopic: Introduction |
78%
Level 2: 60%+
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\(C(s) +O_2(g) \rightarrow CO_2(g) + 400~kJ\)
\(C(s) +\frac{1}{2}O_2(g) \rightarrow CO(g) + 100~kJ\)
When coal of purity 60% is allowed to burn in presence of insufficient oxygen, 60% of carbon is converted into'CO' and the remaining is converted into 'CO2'. The heat generated when 0.6 kg of coal is burnt is:
1. 1600 kJ
2. 3200 kJ
3. 4400 kJ
4. 6600 kJ
Subtopic: Equation Based Problem |
Level 3: 35%-60%
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Consider the following reaction:
\(\mathrm{4 {HNO}_3({l})+3 {KCl}({s})} → \\\mathrm{{Cl}_2({g})+{NOCl}({g})+2 {H}_2 {O}({g})+3 {KNO}_3({s})}\)
How much \(\text{HNO}_3\) (in grams) is required to produce 110.0 g of \(\text{KNO}_3\)?
(Given: Atomic masses of H, O, N, and K are 1, 16, 14, and 39, respectively.)
1. 32.2g
2. 69.4g
3. 91.5g
4. 162.5g
\(\mathrm{4 {HNO}_3({l})+3 {KCl}({s})} → \\\mathrm{{Cl}_2({g})+{NOCl}({g})+2 {H}_2 {O}({g})+3 {KNO}_3({s})}\)
How much \(\text{HNO}_3\) (in grams) is required to produce 110.0 g of \(\text{KNO}_3\)?
(Given: Atomic masses of H, O, N, and K are 1, 16, 14, and 39, respectively.)
1. 32.2g
2. 69.4g
3. 91.5g
4. 162.5g
Subtopic: Equation Based Problem |
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Level 2: 60%+
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6.1 gram of CNG on combustion with 208 grams of O2(g) produces, CO2(g) & H2O with a lot of heat. The amount of CO2 produced in grams is:
[Consider CNG as methane and report your answer to the nearest integer].
1. 15 g
2. 19 g
3. 17 g
4. 21 g
[Consider CNG as methane and report your answer to the nearest integer].
1. 15 g
2. 19 g
3. 17 g
4. 21 g
Subtopic: Equation Based Problem |
76%
Level 2: 60%+
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