Question 1: Palette 1/9

NEET 2026 MCQ

Methane reacts with steam at 1273 K in the presence of nickel catalyst to form :

A

CO and $\mathrm{H}_2 \mathrm{O}$

B

$ \mathrm{CO}_2$ and $\mathrm{H}_2$

C

$ \mathrm{CO}$ and $\mathrm{H}_2$

D

$ \mathrm{CO}_2$ and $\mathrm{H}_2 \mathrm{O}$

Question 2: Palette 2/9

NEET 2023 MCQ

Which of the following statements are NOT correct?

A. Hydrogen is used to reduce heavy metal oxides to metals.

B. Heavy water is used to study reaction mechanism.

C. Hydrogen is used to make saturated fats from oils

D. The $\mathrm{H}-\mathrm{H}$ 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:

A

B, D only

B

D, E only

C

A, B, C only

D

B, C, D, E only

Question 3: Palette 3/9

NEET 2022 MCQ

The pollution due to oxides of sulphur gets 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:

A

(a), (d) only

B

(a), (b), (d) only

C

(b), (c), (d) only

D

(a), (c), (d) only

Question 4: Palette 4/9

NEET 2022 MCQ

In the neutral or faintly alkaline medium, KMnO₄ oxidises iodide into iodate. The change in oxidation state of manganese in this reaction is form

A

+7 to +4

B

+6 to +4

C

+7 to +3

D

+6 to +5

Question 5: Palette 5/9

NEET 2021 MCQ

Tritium, a radioactive isotope of hydrogen, emits which of the the following particles?

A

Neutron (n)

B

Beta ($\beta$^$-$)

C

Alpha ($\alpha$)

D

Gamma ($\gamma$)

Question 6: Palette 6/9

NEET 2019 MCQ

The method used to remove temporary hardness of water is :

A

Ion-exchange method

B

Synthetic resins method

C

Calgon’s method

D

Clark’s method

Question 7: Palette 7/9

NEET 2016 MSQ

Which of the following statements about hydrogen is incorrect?

A

Hydronium ion, H₃O⁺ exists freely in solution.

B

Dihydrogen does not act as a reducing agent.

C

Hydrogen has three isotopes of which tritium is the most common.

D

Hydrogen never acts as cation in ionic salts.

Question 8: Palette 8/9

NEET 2010 MCQ

Some statements about heavy water are given below:
(i)  Heavy water is used as a moderator in nuclear reactors.
(ii)  Heavy water is more associated than ordinary water.
(iii)  Heavy water is more effective solvent than ordinary water.

Which of the above statements are correct?

A

(i) and (ii)

B

(i), (ii) and (iii)

C

(ii) and (iii)

D

(i) and (iii)

Question 9: Palette 9/9

NEET 2003 MCQ

The structure of H₂O₂ is

A

spherical

B

non-planar

C

planar

D

linear