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Q. No.Subtopic: Introduction |
88%
From NCERT
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When 10 mL of an aqueous solution of \(\mathrm{Fe}^{2+}\) ons was titrated in the presence of dil \(\mathrm{H}_2 \mathrm{SO}_4\) using diphenylamine indicator, 15 mL of 0.02 M solution of \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\) was required to get the end point. The molarity of the solution containing \(\mathrm{Fe}^{2+}\) ions is \(\mathrm{x} \times 10^{-2} \mathrm{M}.\) The value of x is: (Nearest integer)
1. 18
2. 34
3. 12
4. 43
1. 18
2. 34
3. 12
4. 43
Subtopic: Concentration Based Problem |
From NCERT
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The density of \(NaOH\) solution is \(1.2~\text{g cm}^{-3}.\) The molality of this solution is _______ m. (Round off to the nearest integer)
[use: Atomic masses:
\(Na:23~u;~~~~~~~O:16.0~u;~~~~~~~~~~H:1.0~u]\)
[Density of \(H_2O:1.0~\text{g cm}^{-3}]\)
1. 12 m
2. 18 m
3. 5 m
4. 3 m
[use: Atomic masses:
\(Na:23~u;~~~~~~~O:16.0~u;~~~~~~~~~~H:1.0~u]\)
[Density of \(H_2O:1.0~\text{g cm}^{-3}]\)
1. 12 m
2. 18 m
3. 5 m
4. 3 m
Subtopic: Concentration Based Problem |
From NCERT
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Consider the complete combustion of butane, the amount of butane utilized to produce \( 72.0~ \text g\) of water is………..\(\times10^{–1}~ \text g.\) (in nearest integer)
1. 464
2. 345
3. 671
4. 124
1. 464
2. 345
3. 671
4. 124
Subtopic: Equation Based Problem |
84%
From NCERT
JEE
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NaClO3 is used, even in spacecrafts, to produce O2 . The daily consumption of pure O2 by a person is 492 L at 1 atm, 300 K. How much amount of NaClO3 , in grams, is required to produce O2 for the daily consumption of a person at 1 atm, 300 K?
\(\begin{aligned} & \mathrm{NaClO}_3(\mathrm{~s})+\mathrm{Fe}(\mathrm{s}) \rightarrow \mathrm{O}_2(\mathrm{~g})+\mathrm{NaCl}(\mathrm{s})+\mathrm{FeO}(\mathrm{s}) \\ & \mathrm{R}=0.082 \mathrm{~L} \text { atm } \mathrm{mol}^{-1} \mathrm{~K}^{-1} \end{aligned}\)
1. 2130 gm
2. 106.5 gm
3. 4123 gm
4. 2912 gm
\(\begin{aligned} & \mathrm{NaClO}_3(\mathrm{~s})+\mathrm{Fe}(\mathrm{s}) \rightarrow \mathrm{O}_2(\mathrm{~g})+\mathrm{NaCl}(\mathrm{s})+\mathrm{FeO}(\mathrm{s}) \\ & \mathrm{R}=0.082 \mathrm{~L} \text { atm } \mathrm{mol}^{-1} \mathrm{~K}^{-1} \end{aligned}\)
1. 2130 gm
2. 106.5 gm
3. 4123 gm
4. 2912 gm
Subtopic: Millimole/Equivalent Concept |
78%
From NCERT
JEE
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When \(35 ~mL\) of \(0.15~ M\) lead nitrate solution is mixed with \(20 ~mL\) of \(0.12 ~M\) chromic sulphate solution, \(x× 10^{–5}\) moles of lead sulfate precipitate out. Calculate the value of \(x\). (Round off to the Nearest Integer)
| 1. | 525 | 2. | 124 |
| 3. | 734 | 4. | 223 |
Subtopic: Limiting Reagent |
50%
From NCERT
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The number of chlorine atoms in \(20~\text{mL}\) of chlorine gas at STP is _____\(10^{21}.\) (Round off to the Nearest Integer). [Assume chlorine is an ideal gas at STP \(\mathrm{R = 0.083~ L~ bar~ mol^{–1} ~ K^{–1} , N_A = 6.023 × 10^{23}]}\)
1. 1.0755
2. 2.3456
3. 6.0223
4. 3.1034
1. 1.0755
2. 2.3456
3. 6.0223
4. 3.1034
Subtopic: Millimole/Equivalent Concept |
75%
From NCERT
JEE
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4 g equimolar mixture of \(\text{NaOH}\) and \(\mathrm{Na_2CO_3}\) contains x g of \(\text{NaOH}\) and y g of \(\mathrm{Na_2CO_3}.\) The value of x is ________ g. (Nearest integer)
1. 2.562
2. 9.354
3. 1.096
4. 3.096
1. 2.562
2. 9.354
3. 1.096
4. 3.096
Subtopic: Concentration Based Problem |
67%
From NCERT
JEE
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If the concentration of glucose \(\left(\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6\right)\) ) in blood is \(0.72 \mathrm{~g} \mathrm{~L}^{-1}\) the molarity of glucose in blood is _________ \(\times 10^{-3} \mathrm{M}.\) (Nearest integer)
(Given : Atomic mas of \(C=12, H=1, O=16 u\))
1. 4
2. 6
3. 2
4. 8
(Given : Atomic mas of \(C=12, H=1, O=16 u\))
1. 4
2. 6
3. 2
4. 8
Subtopic: Concentration Based Problem |
83%
From NCERT
JEE
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Methylation of 10 g of benzene gave 9.2 g of toluene. Calculate the percentage yield of toluene (Nearest integer).
1. 52%
2. 78%
3. 23%
4. 43%
1. 52%
2. 78%
3. 23%
4. 43%
Subtopic: Concentration Based Problem |
77%
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