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Q. No.Which of the following statements is NOT correct?
Choose the most appropriate answer from the options given below:
| A. | Hydrogen is used to reduce heavy metal oxides to metals. |
| B. | Heavy water is used to study the reaction mechanism. |
| C. | Hydrogen is used to make saturated fats from oils. |
| D. | The H-H bond dissociation enthalpy is lowest as compared to a single bond between two atoms of any element. |
| E. | Hydrogen reduces oxides of metals that are more active than iron. |
| 1. | A, B, C only | 2. | B, C, D, E only |
| 3. | B, D only | 4. | D, E only |
Subtopic: Preparation & Properties |
Level 3: 35%-60%
NEET - 2023
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The List-I with List-II
Choose the correct answer from the options given below:
| List-I (Hydride) |
List-II (Type of Hydride) |
||
| A. | NaH | (I) | Electron precise |
| B. | PH3 | (II) | Saline |
| C. | GeH4 | (III) | Metallic |
| D. | LaH2.87 | (IV) | Electron rich |
Choose the correct answer from the options given below:
| Options: | (A) | (B) | (C) | (D) |
| 1. | III | IV | II | I |
| 2. | II | III | IV | I |
| 3. | I | III | II | IV |
| 4. | II | IV | I | III |
Subtopic: Type of Hydride |
54%
Level 3: 35%-60%
NEET - 2023
Hints
Match List - I with List - II.
| List-I (Hydrides) |
List - II (Nature) |
||
| (a) | MgH2 | (i) | Electron precise |
| (b) | GeH4 | (ii) | Electron deficient |
| (c) | B2H6 | (iii) | Electron rich |
| (d) | HF | (iv) | Ionic |
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iii) | (iv) | (i) |
| 2. | (iv) | (i) | (ii) | (iii) |
| 3. | (iii) | (i) | (ii) | (iv) |
| 4. | (i) | (ii) | (iv) | (iii) |
Subtopic: Type of Hydride |
58%
Level 3: 35%-60%
NEET - 2022
Hints
Match list-I with list-II:
| List-I (Commercial name) |
List-II (Chemical name) |
||
| (a) | Calgon | (i) | Sodium aluminium silicate (hydrated) |
| (b) | Permutit | (ii) | Sodium carbonate |
| (c) | Soap | (iii) | Sodium hexameta-phosphate |
| (d) | Washing soda | (iv) | Sodium stearate |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (iv) | (ii) | (iii) |
| 2. | (iii) | (i) | (iv) | (ii) |
| 3. | (ii) | (iii) | (iv) | (i) |
| 4. | (iv) | (iii) | (i) | (ii) |
Subtopic: Hard & Soft Water |
83%
Level 1: 80%+
NEET - 2022
Hints
Subtopic: Preparation & Properties |
66%
Level 2: 60%+
NEET - 2022
Hints
Tritium, a radioactive isotope of hydrogen, emits which of the following particles?
1. Gamma
2. Neutron (n)
3. Beta
4. Alpha
Subtopic: Hydrogen- Types & Isotopes |
64%
Level 2: 60%+
NEET - 2021
Hints
Match the following and identify the correct option
| (a) CO(g)+H2(g) | (i) Mg(HCO3)2+Ca(HCO3)2 |
| (b) Temporary hardness of water | (ii) An electron deficient hydride |
| (c) B2H6 | (iii) Synthesis gas |
| (d) H2O2 | (iv) Non-planar structure |
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (ii) | (i) | (iv) |
| 2. | (iii) | (iv) | (ii) | (i) |
| 3. | (i) | (iii) | (ii) | (iv) |
| 4. | (iii) | (i) | (ii) | (iv) |
Subtopic: Hard & Soft Water | H2O2 (Hydrogen Peroxide) |
84%
Level 1: 80%+
NEET - 2020
Hints
The method used to remove the temporary hardness of water is-
1. Synthetic resins method
2. Calgon's method
3. Clark's method
4. Ion-exchange method
Subtopic: Hard & Soft Water |
78%
Level 2: 60%+
NEET - 2019
Hints
Links
If the molality of the dilute solution is doubled, the value of molal depression constant (Kf) will be-
1. Halved
2. Tripled
3. Unchanged
4. Doubled
72%
Level 2: 60%+
NEET - 2017
Hints
Links
An incorrect statement among the following regarding hydrogen is:
| 1. | Hydrogen never acts as a cation in ionic salts. |
| 2. | Hydronium ion, H3O+ exists freely in a solution. |
| 3. | Dihydrogen does not act as a reducing agent. |
| 4. | Hydrogen has three isotopes of which protium is the most common. |
Subtopic: Preparation & Properties |
66%
Level 2: 60%+
NEET - 2016
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