1
IIT-JEE 1981
MCQ (Single Correct Answer)
+1
-0.25
Rutherford's experiment on scattering of $$\alpha-particles$$ showed for the first time that the atom has
A
electrons
B
protons
C
nucleus
D
neutrons
2
IIT-JEE 1981
Subjective
+3
-0
The energy of the electron in the second and the third Bohr's orbits of the hydrogen atom is -5.42 $$\times$$ 10-12 erg and -2.41 $$\times$$ 10-12 erg respectively. Calculate the wavelength of the emitted radiation when the electron drops from the third to second orbit.
3
IIT-JEE 1981
MCQ (Single Correct Answer)
+1
-0.25
The correct order of second ionisation potential of carbon, nitrogen, oxygen and fluorine is
A
C > N > O > F
B
O > N > F > C
C
O > F > N > C
D
F > O > N > C
4
IIT-JEE 1981
Fill in the Blanks
+1
-0
The angle between two convalent bonds is maximum in ________. (CH4, H2O, CO2)
JEE Advanced Papers
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12