When a neutral atom is converted into a cation, there is
When a neutral atom is converted into a cation, there is
Options
(a) decrease in the atomic number (b) an increase in the atomic number (c) an increase in size (d) a decrease […]
Chemistry
What is the weight of oxygen required for the complete combusion of 2.8 kg of ethylene?
What is the weight of oxygen required for the complete combusion of 2.8 kg of ethylene?
Options
(a) 2.8 kg (b) 6.4 kg (c) 9.6 kg (d) 96 kg
Correct Answer:
9.6 kg
The first ionization potentials (eV) of Be and B respectively are
The first ionization potentials (eV) of Be and B respectively are
Options
(a) 8.29, 9.32 (b) 9.32, 9.32 (c) 8.29, 8.29 (d) 9.32, 8.29
Correct Answer:
9.32, 8.29
Explanation:
First ionisation potential of […]
Which has the maximum number of molecules among the following
Which has the maximum number of molecules among the following
Options
(a) 44 g CO₂ (b) 48 g O₃ (c) 8 g H₂ (d) 64 g SO₂
Correct Answer:
8 g H₂
Explanation: […]
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 […]
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 […]