A sample of CaCO₃ is 50% pure. On heating 1.12 L of CO₂ at STP is obtained
A sample of CaCO₃ is 50% pure. On heating 1.12 L of CO₂ at STP is obtained. Residue left(assuming non volatile impurity) is
Options
(a) 7.8 g (b) 3.8 g (c) 2.8 g […]
Easy
A mixture contains O₂ and N₂ in the ratio of 1 : 4 by the weight
A mixture contains O₂ and N₂ in the ratio of 1 : 4 by the weight. The ratio of their number of moles is
Options
(a) 1 : 8 (b) 1 : 4 […]
If the energy of a photon is given as : =3.03 × 10⁻¹⁹J then, the wavelength (λ)
If the energy of a photon is given as : =3.03 × 10⁻¹⁹J then, the wavelength (λ) of the photon is :
Options
(a) 6.56 nm (b) 65.6 nm (c) 656 nm (d) […]
The de-Broglie wavelength associated with a ball of mass 1kg having kinetic energy
The de-Broglie wavelength associated with a ball of mass 1kg having kinetic energy 0.5 J is
Options
(a) 6.626 x 10⁻³⁴ m (b) 13.20 x 10⁻³⁴ m (c) 10.38 x 10⁻²¹ m (d) […]
The momentum of a particle having a de Broglie wavelength of 10⁻¹⁷metres is
The momentum of a particle having a de Broglie wavelength of 10⁻¹⁷metres is (Given h= 6.625 × 10⁻³⁴Js)
Options
(a) 3.3125 x 10⁻⁷kg ms⁻¹ (b) 26.5 x 10⁻⁷kg ms⁻¹ (c) 6.625 x 10⁻¹⁷kg […]
Ratio of Cᵥ and Cᵥ of the gas X is 1.4. The number of atoms of the gas X present
Ratio of Cᵥ and Cᵥ of the gas X is 1.4. The number of atoms of the gas X present in 11.2 litres of it at NTP will be
Options
(a) 6.02 x […]
Gram molecular volume of oxygen at STP is
Gram molecular volume of oxygen at STP is
Options
(a) 3200 cm³ (b) 5600 cm³ (c) 22400 cm³ (d) 11200 cm³
Correct Answer:
5600 cm³
Explanation:
Gram molecular volume of oxygen at STP […]
If ionization potential for hydrogen atom is 13.6eV, then ionization potential
If ionization potential for hydrogen atom is 13.6eV, then ionization potential for He⁺ will be
Options
(a) 54.4 eV (b) 6.8 eV (c) 13.6 eV (d) 24.5 eV
Correct Answer:
54.4 eV
Explanation: […]
The correct set of four quantum numbers for the valence electron of rubidium atom
The correct set of four quantum numbers for the valence electron of rubidium atom(Z=37) is
Options
(a) 5,1,1,+½ (b) 6,0,0,+½ (c) 5,0,0,+½ (d) 5,1,0,+½
Correct Answer:
5,0,0,+½
Explanation:
₃₇Rb=₃₆[Kr] 5s Its valence electron […]
If 30 mL of H₂ and 20 mL of O₂ reacts to form water. what is left at the end
If 30 mL of H₂ and 20 mL of O₂ reacts to form water. what is left at the end of the reaction?
Options
(a) 10 mL of H₂ (b) 5 mL of […]