A 0.66 kg ball is moving with a speed of 100 m/s. The associated wavelength
A 0.66 kg ball is moving with a speed of 100 m/s. The associated wavelength will be(h=6.6 x 10⁻³⁴ Js)
Options
(a) 1.0 x 10⁻³² m (b) 6.6 x 10⁻³² m (c) 6.6 […]
Questions
What is the ratio of mass of an electron to the mass of a proton?
What is the ratio of mass of an electron to the mass of a proton?
Options
(a) 1 : 1 (b) 1 : 2 (c) 1 : 3 (d) 1 : 1837
Correct […]
Number of moles of MnO₄⁻ required to oxidize one mole of ferrous oxalate
Number of moles of MnO₄⁻ required to oxidize one mole of ferrous oxalate completely in acidic medium will be
Options
(a) 0.6 moles (b) 0.4 moles (c) 7.5 moles (d) 0.2 moles
Correct Answer: […]
The radius of hydrogen atom in the ground state is 0.53 Å. The radius
The radius of hydrogen atom in the ground state is 0.53 Å. The radius of Li2+ ion (atomic number = 3) in a similar state is
Options
(a) 0.17 Å (b) 0.265 Å […]
What is the [OH⁻] in the final solution prepared by mixing 20 mL of 0.05 M Hcl
What is the [OH⁻] in the final solution prepared by mixing 20 mL of 0.05 M Hcl with 30 mL of 0.1 M Ba(OH)₂?
Options
(a) 0.4 M (b) 0.005 M (c) 0.12 […]
Equal volumes of 0.1 M AgNO₃ and 0.2 M NaCl are mixed
Equal volumes of 0.1 M AgNO₃ and 0.2 M NaCl are mixed. The concentration of NO₃⁻ ions in the mixture will be
Options
(a) 0.1 M (b) 0.05 M (c) 0.2 M (d) […]
6.02 x 10²° molecules of urea are present in 100 mL of its solution
6.02 x 10²° molecules of urea are present in 100 mL of its solution. The concentration of the solution is
Options
(a) 0.01 M (b) 0.001 M (c) 0.1 M (d) 0.02 M
In hydrogen atom, energy of first excited state is –3.4 eV. Find out KE
In hydrogen atom, energy of first excited state is –3.4 eV. Find out KE of the same orbit of Hydrogen atom
Options
(a) +3.4 eV (b) +6.8 eV (c) –13.6 eV (d) +13.6 […]
The electronic configuration of four elements are given below. Which elements does
The electronic configuration of four elements are given below. Which elements does not belong to the same family as others ?
Options
(a) [Xe]4f¹⁴5d¹°1s² (b) [Kr]4d¹°5s² (c) [Ne]3s³3p⁵ (d) [Ar] 3d¹°4s²
Correct Answer: […]
Which one of the elements has the highest ionisation energy?
Which one of the elements has the highest ionisation energy?
Options
(a) [Ne] 3s²3p¹ (b) [Ne] 3s²,3p² (c) [Ne] 3s²,3p³ (d) [Ar] 3d¹°4s²4p²
Correct Answer:
[Ne] 3s²,3p³
Explanation:
Exactly half-filled orbitals have extra […]