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Q. No.Which of the following statements is incorrect?
1.
In a homogeneous mixture, the composition is uniform.
2.
Compounds are formed when atoms of different elements combine in any ratio.
3.
Atoms of the same element have identical atomic mass and properties.
4.
In a heterogeneous mixture, the composition is not uniform.
Subtopic: Introduction |
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Level 2: 60%+
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Consider the following combustion reaction:
\(\mathrm{CH}_4+\mathrm{O}_2 \longrightarrow \mathrm{CO}_2+\mathrm{H}_2 \mathrm{O}\)
How many moles of methane (\(\mathrm{CH_4}\)) will be required for the formation of 11 g of carbon dioxide (\(\mathrm{CO_2}\))?
\(\mathrm{CH}_4+\mathrm{O}_2 \longrightarrow \mathrm{CO}_2+\mathrm{H}_2 \mathrm{O}\)
How many moles of methane (\(\mathrm{CH_4}\)) will be required for the formation of 11 g of carbon dioxide (\(\mathrm{CO_2}\))?
| 1. | 0.25 | 2. | 0.62 |
| 3. | 0.17 | 4. | 1.23 |
Subtopic: Equation Based Problem |
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Level 1: 80%+
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x g of ethylamine on reaction with NaNO2 and HCl, produces 2.24 L of N2(g) at NTP. The value of 2x will be:
1. 8
2. 6
3. 0
4. 9
1. 8
2. 6
3. 0
4. 9
Subtopic: Concentration Based Problem |
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Calculate the molarity of NaCl solution, if 5.85 gm of NaCl is dissolved in 500 ml of solution.
1. 0.1 M
2. 0.2 M
3. 0.32 M
4. 0.4 M
1. 0.1 M
2. 0.2 M
3. 0.32 M
4. 0.4 M
Subtopic: Concentration Based Problem |
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Level 1: 80%+
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If \(\mathrm{C}=42.1 \%, \mathrm{H}=6.4 \%, \mathrm{O}=52.5 \%\) and molar mass is \(342~\text{g/mol},\) then the molecular formula of that compound is:
1. \(\mathrm{C}_{11} \mathrm{H}_{22} \mathrm{O}_{12}\)
2. \(\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}\)
3. \(\mathrm{C}_{10} \mathrm{H}_{20} \mathrm{O}_{11}\)
4. \(\mathrm{C}_{11} \mathrm{H}_{22} \mathrm{O}_{11}\)
1. \(\mathrm{C}_{11} \mathrm{H}_{22} \mathrm{O}_{12}\)
2. \(\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}\)
3. \(\mathrm{C}_{10} \mathrm{H}_{20} \mathrm{O}_{11}\)
4. \(\mathrm{C}_{11} \mathrm{H}_{22} \mathrm{O}_{11}\)
Subtopic: Empirical & Molecular Formula |
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Level 2: 60%+
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Hints
We are provided with the graph depicting the relationship between pressure (P) and temperature (T).
Choose the correct option:
1. \(\rho_1>\rho_2>\rho_3 \)
2. \(\rho_1<\rho_2<\rho_3 \)
3. \(\rho_1=\rho_2=\rho_3 \)
4. \(\rho_2>\rho_1>\rho_3\)
Choose the correct option:
1. \(\rho_1>\rho_2>\rho_3 \)
2. \(\rho_1<\rho_2<\rho_3 \)
3. \(\rho_1=\rho_2=\rho_3 \)
4. \(\rho_2>\rho_1>\rho_3\)
Subtopic: Concentration Based Problem |
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Find the mass (in g) of \(\mathrm{O}_2\) required for the complete combustion of 900 g glucose.
1. 960
2. 800
3. 500
4. 780
1. 960
2. 800
3. 500
4. 780
Subtopic: Equation Based Problem |
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Molality of aqueous solution of urea is 4.44 m. Then mole fraction of urea is \(x \times 10^{-3}.\) The value of \(\mathrm{x}\) is:
1. 67
2. 74
3. 93
4. 87
1. 67
2. 74
3. 93
4. 87
Subtopic: Concentration Based Problem |
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Moles of \(\text{CH}_4\) required for the formation of 22 gm of \(\text{CO}_2\) is \(\text{m}\times10^{-2}.\)
The value of m is:
1. 50
2. 67
3. 90
4. 78
The value of m is:
1. 50
2. 67
3. 90
4. 78
Subtopic: Moles, Atoms & Electrons |
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Level 1: 80%+
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Methane reacts with oxygen according to the following chemical equation:
CH₄ + 2O₂ → CO₂ + 2H₂O
Calculate the mass of methane required to produce 22 g of carbon dioxide:
1. Eight (8)
2. One (1)
3. Nine (9)
4. Seven (7)
Subtopic: Equation Based Problem |
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