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1
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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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
2
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus

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
3
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus

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
4
NEET 2021
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Tritium, a radioactive isotope of hydrogen, emits which of the the following particles?
A
Neutron (n)
B
Beta ($$\beta$$$$-$$)
C
Alpha ($$\alpha$$)
D
Gamma ($$\gamma$$)
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