JEE Main 202624 JanuaryEvening Shift
- Exam
- JEE Main
- Year
- 2026
- Date
- 24 January
- Shift
- Evening Shift
- Subject
- Chemistry
- Chapter
- Classification of Elements and Periodicity in Properties
JEE Main 2026 · 24 January · Evening Shift · Chemistry · Classification of Elements and Periodicity in Properties
Choose the INCORRECT statement
Choose the INCORRECT statement
Options
- A is the most acidic oxide among the dioxides of group of 14 elements.
- BCarbon exhibits negative oxidation states along with +4 and +2.
- CCarbon cannot exceed its covalency more than four.
- DAmong the isotopes of carbon, is a radioactive isotope.
Correct answer
D. Among the isotopes of carbon, is a radioactive isotope.
Step-by-step solution
Analyzing each statement:
1 CO₂ is most acidic among group 14 dioxides - correct, it's a non-metal acidic oxide.
2 Carbon shows negative oxidation states (-4 in methane, -3 in ethane, etc.) along with +2 and +4 - correct.
3 Carbon covalency cannot exceed 4 - correct, as it's period 2 element unable to expand octet.
4 ¹³C is radioactive - incorrect. ¹³C is a stable, non-radioactive isotope. ¹⁴C is the radioactive isotope used in radiocarbon dating with half-life of 5730 years. Therefore, statement (4) is incorrect.
1 CO₂ is most acidic among group 14 dioxides - correct, it's a non-metal acidic oxide.
2 Carbon shows negative oxidation states (-4 in methane, -3 in ethane, etc.) along with +2 and +4 - correct.
3 Carbon covalency cannot exceed 4 - correct, as it's period 2 element unable to expand octet.
4 ¹³C is radioactive - incorrect. ¹³C is a stable, non-radioactive isotope. ¹⁴C is the radioactive isotope used in radiocarbon dating with half-life of 5730 years. Therefore, statement (4) is incorrect.