Organic Chemistry
Some Basic Concepts of Organic Chemistry
MCQ (Single Correct Answer)MCQ (Multiple Correct Answer)
Alcohol, Phenols and Ethers
MCQ (Single Correct Answer)
Aldehydes, Ketones and Carboxylic Acids
MCQ (Single Correct Answer)MCQ (Multiple Correct Answer)
Organic Compounds Containing Nitrogen
MCQ (Single Correct Answer)
Chemistry in Everyday Life
MCQ (Single Correct Answer)
1
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

If radius of second Bohr orbit of the He+ ion is 105.8 pm, what is the radius of third Bohr orbit of Li2+ ion?

A
158.7 pm
B
15.87 pm
C
1.587 pm
D
158.7 $$\mathop A\limits^o $$
2
NEET 2021
MCQ (Single Correct Answer)
+4
-1
A particular station of All India Radio, New Delhi broadcasts on a frequency of 1,368 kHz (kilohertz). The wavelength of the electromagnetic radiation emitted by the transmitter is : [speed of light c = 3.0 $$\times$$ 108 ms$$-$$1]
A
21.92 cm
B
219.3 m
C
219.2 m
D
2192 m
3
NEET 2021
MCQ (Single Correct Answer)
+4
-1
From the following pairs of ions which one is not an iso-electronic pair?
A
Fe2+, Mn2+
B
O2$$-$$, F$$-$$
C
Na+, Mg2+
D
Mn2+, Fe3+
4
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region?
A
Paschen series
B
Brackett series
C
Lyman series
D
Balmer series
NEET Subjects