Assuming fully decomposed, the volume of CO₂ released at STP on heating 9.85 g of BaCO₃(Atomic mass Ba=137) will be
Options
(a) 2.24 L (b) 4.96 L (c) 1.12L (d) 0.84L
Correct Answer: […]
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 […]
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 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 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 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. 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. 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 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 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: […]
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