C6H5F18 is a F18 radio-isotope labelled organic compound. F18 decays by positron emission. The product resulting on decay is
C6H5O18
C6H5Ar19
B12C5H5F
C6H5O16
The energy required to break one mole of hydrogen-hydrogen bonds in H2 is 436 kJ. What is the longest wavelength of light required to break a single hydrogen-hydrogen bond?
68.5nm
137nm
274nm
584nm
An element E loses one and two particles in three successive stages. The resulting elemenl wiil be
an isobar of E
an isotone of E
an isotope of E
E itself
Which one of the following corresponds to a photon of highest energy?
λ = 300 mm
v = 3 × 108 s-1
= 30 cm-1
ε = 6.626 × 10-27 J
The time taken for an electron to complete one revolution in Bohr orbit of hydrogen atom is
C.
Amongst the following, which should have the highest rms speed at the same temperature?
SO2
CO2
O2
H2
The emission spectrum of hydrogen discovered first and the region of the electromagnetic spectrum in which it belongs, respectively are
Lyman, ultraviolet
Lyman, visible
Balmer, ultraviolet
Balmer, visible
The electronic configuration of Cu is
[Ne] 3s2,3p6,3d9,4s2
[Ne] 3s2,3p6, 3d10, 4s1
[Ne] 3s2,3p6, 3d3,4s2, 4p6
[Ne] 3s2,3p6,3d5,4s2,4p4
As per de-Broglie's formula a macroscopic particle of mass 100 g and moving at a velocity of 100 cm s-1 will have a wavelength of
6.6 x 10-29 cm
6.6 x 10-30 cm
6.6 x 10-31 cm
6.6 x 10-32 cm
During the emission of a positron from a nucleus, the mass number of the daughter element remains the same but the atomic numbe
is decreased by 1 unit
is decreased by 2 units
is increased by 1 unit
remains unchanged