Nitric acid ionises slightly in HF,
Then.
HNO3 and H2NO
HF and F- are bases
HNO3 and F- are bases
only HNO3 is base
The wavelength of an electron having kinetic energy equal to 4.55 × 10-25 J is (h = 6.6 × 10-34 kgm2s-1, mass of electron = 9.1 × 10-31 kg)
7.25 × 10-7 nm
725 nm
7.25 × 10-7 m
7.25 × 107 nm
A proton is converted to a neutron by
1.β- emission
2.β+ emission
3. electron capture
Which of the statements given above are correct?
(1) and (2) only
(2) and (3) only
(1) and (3) only
(1), (2) and (3)
If the molar solubility of X3B3(AlF6)2 at 298 K is x, the solubility product Ksp is
18x3
27x4
27x8
2916x8
D.
2916x8
Indicate the pair whose one member has the highest and other has the lowest electronegativity
I and F
Fr and Li
K and Cs
F and Fr
Atomic numbers of elements X, Y and Z are 50, 78 and 60 respectively. These elements are placed in modem long form of Periodic Table respectively in
p-block, d-block and f-block
p-block, d-block and s-block
s-block, p-block and d-block
s-block, d-block and f-block