A sp³ – hybrid orbital contains
Options
(a) 1/4 s-character (b) 1/2 s-character (c) 3/4 s-character (d) Any of these
Correct Answer:
1/4 s-character
Explanation:
In sp³-hybridisation, there is 25% s-character and 75% […]
If uncertainty in position and momentum are equal, then uncertainty in velocity is :
Options
(a) 1/2m x √(h/π) (b) √(h/2π) (c) 1/m x √(h/π) (d) √(h/π)
Correct Answer:
1/2m x √(h/π)
Explanation: […]
The number of atoms in 0.1 mol of a triatomic gas is (Na = 6.02 x 10²³ mol⁻¹)
Options
(a) 6.026 x 10²² (b) 1.806 x 10²³ (c) 3.6 x 10²³ (d) 1.8 […]
An aqueous solution of glucose is 10% in strength. The volume in which 1 g mole of it is dissolved wil be
Options
(a) 18 L (b) 92 L (c) 0.9 L (d) […]
The weight of one molecule of a compound C₆₀H₁₂₂ is
Options
(a) 1.2 x 10⁻²° gram (b) 1.4 x 10⁻²¹ gram (c) 5.025 x 10²³ gram (d) 6.023 x 10²³ gram
Correct Answer: […]
If 1 mL of water contains 20 drops then number of molecules in a drop of water is
Options
(a) 6.023 x 10²³ molecules (b) 1.376 x 10²⁶ molecules (c) 1.344 x 10¹⁸ […]
The number of oxygen atoms in 4.4g of CO₂ is
Options
(a) 1.2 x 10²³ (b) 6 x 10²² (c) 6 x 10²³ (d) 12 x 10²³
Correct Answer:
1.2 x 10²³
Explanation: […]
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 […]
2017 Copyright Doctor Dreams Training Academy