Ncert Solutions Chemistry Class 11th
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Zr(Z = 40) and Hf(Z = 72) have similar atomic and ionic radii because of :
Zr(Z = 40) and Hf(Z = 72) have similar atomic and ionic radii because of :
Due to lanthanoid contraction Zr and Hf has similar atomic and ionic radii.
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Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are :
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Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are :
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No. of atoms in Hexagonal primitive unit cell = 6
No. of Tetrahedral voids = 2 * No. of atoms per unit cell
= 2 * 6 = 12
No. of Octahedral voids = No. of atoms per unit cell = 6
Upvote The pollution due to oxides of sulphur get enhanced due to the presence of:
(a) particulate matter
(b) ozone
(c) hydrocarbons
(d) hydrogen peroxide
Choose the most appropriate answer from the options given below:
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The pollution due to oxides of sulphur get enhanced due to the presence of:
(a) particulate matter
(b) ozone
(c) hydrocarbons
(d) hydrogen peroxide
Choose the most appropriate answer from the options given below:
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Pollution due to oxides of sulphur gets enhanced due to hydrocarbons and oxidizing agents like O? & H? O?
Upvote A 10.0 L flask contains 64 g of oxygen at 27°C. (Assume O2 gas is behaving ideally). The pressure inside the flask in bar is (Given R = 0.0831 LbarK-1 mol-1)
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A 10.0 L flask contains 64 g of oxygen at 27°C. (Assume O2 gas is behaving ideally). The pressure inside the flask in bar is (Given R = 0.0831 LbarK-1 mol-1)
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M = (a³ × d × N_A) / Z = (3.608 × 10? )³ × 8.92 × 6.022 × 10²³) / 4
M = (46.96 × 10? ²? × 8.92 × 6.022 × 10²³) / 4 = 63 g/mole
the closest answer is choice (1)
P = (nRT) / V = (2 × 0.0831 × 300) / 10 = 4.986 bar
Upvote What mass of 95% pure CaCO3 will be require neutralise 50 mL of 0.5M HCl solution according to the following reaction?
CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + 2H2O(l) [Calculate upto second place of decimal point]
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What mass of 95% pure CaCO3 will be require neutralise 50 mL of 0.5M HCl solution according to the following reaction?
CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + 2H2O(l) [Calculate upto second place of decimal point]
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Moles of HCl = (50 / 1000) × 0.5 = 0.025 moles
So, moles of CaCO? used = 0.025 / 2 = 0.0125 moles = 1.25 g
95% (Total mass of CaCO? ) = 1.25 g
Total mass of CaCO? = 1.25 / 0.95 = 1.32 g
Upvote Which one is not correct mathematical equation for Dalton's Law of partial pressure? Here p = total pressure of gaseous mixture.
Which one is not correct mathematical equation for Dalton's Law of partial pressure? Here p = total pressure of gaseous mixture.
p? = p? x? is not a correct form of Dalton's law of partial pressures.
Upvote Identify the incorrect statement from the following.
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Identify the incorrect statement from the following.
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Shapes of d? ²? ² and d? ² are not similar to each other.
Upvote Given below are two statements:
Statement I:
The acidic strength of monosubstituted nitrophenol is higher than phenol because of electron withdrawing nitro group.
Statement II:
o-nitrophenol, m-nitrophenol and p-nitrophenol will have same acidic strength as they have one nitro group attached to the phenolic ring.
In the light of the above statements, choose the most appropriate answer from the options given below:
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Given below are two statements:
Statement I:
The acidic strength of monosubstituted nitrophenol is higher than phenol because of electron withdrawing nitro group.
Statement II:
o-nitrophenol, m-nitrophenol and p-nitrophenol will have same acidic strength as they have one nitro group attached to the phenolic ring.
In the light of the above statements, choose the most appropriate answer from the options given below:
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At different positions -NO? affects acidic strength differently. The order of acidic strength is p-nitrophenol > o-nitrophenol > m-nitrophenol.
Upvote <p><strong>Given below are two statements:</strong></p>
<p><strong>Statement I:</strong><br><strong>The acidic strength of monosubstituted nitrophenol is higher than phenol because of electron withdrawing nitro group.</strong></p>
<p><strong>Statement II:</strong><br><strong>o-nitrophenol, m-nitrophenol and p-nitrophenol will have same acidic strength as they have one nitro group attached to the phenolic ring.</strong></p>
<p><strong>In the light of the above statements, choose the most appropriate answer from the options given below:</strong><br><strong><!-- [if !supportLineBreakNewLine]--></strong><br><!--[endif]--></p>
Which of the following p – V curve represents maximum work done?
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Which of the following p – V curve represents maximum work done?
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Maximum work is done in the case where area under the curve is maximum.
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