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Q. No.The first and second ionisation enthalpies of a metal are 496 and 4560 \(KJ ~mol^{-1}\), respectively. How many moles of \(HCl\) and \(H_2SO_4\), respectively, will be needed to react completely with 1 mole of the metal hydroxide?
1. 1 and 1
2. 2 and 0.5
3. 1 and 2
4. 1 and 0.5
Subtopic: Ionization Energy (IE) |
From NCERT
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Which of the following will have a greater value for phosphorus than for magnesium?
1. I only.
2. I and II only.
3. II and III only.
4. I, II and III.
| I: | Atomic radius. |
| II: | Ionization energy. |
| III: | Electronegativity. |
2. I and II only.
3. II and III only.
4. I, II and III.
Subtopic: Ionization Energy (IE) |
82%
From NCERT
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Which of the following elements exhibits properties of both metals and nonmetals?
1. Si
2. Al
3. Zn
4. Hg
1. Si
2. Al
3. Zn
4. Hg
Subtopic: Nature of Compound |
69%
From NCERT
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The correct sequence given below contains neutral, acidic, basic, and amphoteric oxide each, respectively is:
| 1. | NO, ZnO, CO2, CaO | 2. | ZnO, NO, CaO, CO2 |
| 3. | NO, CO2, ZnO, CaO | 4. | NO, CO2, CaO, ZnO |
Subtopic: Nature of Compound |
77%
From NCERT
NEET - 2023
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Which of the following pair is correctly matched?
1. Basic oxides - \(\mathrm{In_2O_3 , K_2O , SnO_2}\)
2. Neutral oxides - \(\mathrm{CO, NO_2, N_2O}\)
3. Acidic oxides - \(\mathrm{Mn_2O_7, SO_2, TeO_3}\)
4. Amphoteric oxides -\(\mathrm{BeO , Ga_2O_3 , GeO }\)
1. Basic oxides - \(\mathrm{In_2O_3 , K_2O , SnO_2}\)
2. Neutral oxides - \(\mathrm{CO, NO_2, N_2O}\)
3. Acidic oxides - \(\mathrm{Mn_2O_7, SO_2, TeO_3}\)
4. Amphoteric oxides -\(\mathrm{BeO , Ga_2O_3 , GeO }\)
Subtopic: Nature of Compound |
From NCERT
NEET - 2023
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Which one of the following represents all isoelectronic species?
1. \(\mathrm{Na^+ , Cl^-, O^- , NO^+}\)
2. \(\mathrm{N_2O, N_2O_4 , NO^+, NO}\)
3. \(\mathrm{Na^+ , Mg^{2+} , O^- , F^-}\)
4. \(\mathrm{Ca^{2+} , Ar, K^+, Cl^-}\)
1. \(\mathrm{Na^+ , Cl^-, O^- , NO^+}\)
2. \(\mathrm{N_2O, N_2O_4 , NO^+, NO}\)
3. \(\mathrm{Na^+ , Mg^{2+} , O^- , F^-}\)
4. \(\mathrm{Ca^{2+} , Ar, K^+, Cl^-}\)
Subtopic: Ionization Energy (IE) |
76%
From NCERT
NEET - 2023
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The element expected to form the largest ion to achieve the nearest noble gas configuration is:
| 1. | Sodium(Na) | 2. | Oxygen(O) |
| 3. | Fluorine(F) | 4. | Nitrogen(N) |
Subtopic: Atomic Size |
55%
From NCERT
NEET - 2023
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Arrange the elements Li, Be, B, C, and N in increasing order of their first ionization enthalpies:
1. Li < B < Be < C < N
2. Li < Be < C < B < N
3. Li < Be < N < B < C
4. Li < Be < B < C < N
1. Li < B < Be < C < N
2. Li < Be < C < B < N
3. Li < Be < N < B < C
4. Li < Be < B < C < N
Subtopic: Ionization Energy (IE) |
77%
From NCERT
NEET - 2024
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Arrange the following elements in increasing order of electronegativity N, O, F, C, Si.
Choose the correct answer from the options given below:
1. Si < C < O < N < F
2. O < F < N < C < Si
3. F < O < N < C < Si
4. Si < C < N < O < F
Choose the correct answer from the options given below:
1. Si < C < O < N < F
2. O < F < N < C < Si
3. F < O < N < C < Si
4. Si < C < N < O < F
Subtopic: Electronegativity |
79%
From NCERT
NEET - 2024
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Identify the incorrect statement:
| 1. | The oxidation state and coordination number (or covalency) of \(\mathrm{Al}\) in\( \left[\mathrm{AlCl}\left(\mathrm{H}_2 \mathrm{O}\right)_5\right]^{2+} \) are +3 and 6, respectively. |
| 2. | \(\mathrm{Na}_2 \mathrm{O}\) is a basic oxide and \(\mathrm{Cl}_2 \mathrm{O}_7\) is an acidic oxide |
| 3. | The following four species are called isoelectronic species: \( \mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+} \mathrm{and}~ \mathrm{Mg}^{2+}\) |
| 4. | Among the four species \(\mathrm{Mg}, \mathrm{Al}, \mathrm{Mg}^{2+}\) and \(\mathrm{A l^{3+},}\) the smallest one is \(\mathrm{Al}.\) |
Subtopic: Ionization Energy (IE) |
80%
From NCERT
NEET - 2024
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