Which of the following statements is NOT correct?
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. 
Choose the most appropriate answer from the options given below: 
1. A, B, C only  2. B, C, D, E only 
3. B, D only  4. D, E only 
Subtopic:  Preparation & Properties |
From NCERT
NEET - 2023
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The List-I with List-II 
 
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 |
 56%
From NCERT
NEET - 2023
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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
Choose the correct answer from the options given below:
(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 |
 59%
From NCERT
NEET - 2022
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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 |
 84%
From NCERT
NEET - 2022
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The element used for welding metals with high melting points is:
1.  Cl2
2.  H2
3.  Ne
4.  He
Subtopic:  Preparation & Properties |
 68%
From NCERT
NEET - 2022
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Tritium, a radioactive isotope of hydrogen, emits which of the following particles?

1. Gamma (γ)

2. Neutron (n)

3. Beta β-

4. Alpha (α)

Subtopic:  Hydrogen- Types & Isotopes |
 65%
From NCERT
NEET - 2021
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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) |
 85%
From NCERT
NEET - 2020
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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 |
 79%
From NCERT
NEET - 2019
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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

 71%
From NCERT
NEET - 2017
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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%
From NCERT
NEET - 2016
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