³⁵₁₇Cl and ³⁷₁₇Cl are two isotopes of chlorine. If average atomic weight is 35.5
³⁵₁₇Cl and ³⁷₁₇Cl are two isotopes of chlorine. If average atomic weight is 35.5 then ratio of these two isotopes is
Options
(a) 35 : 37 (b) 1 : 3 (c) 3 : […]
Questions
The ratio of the difference in energy between first and second Bohr orbit
The ratio of the difference in energy between first and second Bohr orbit to that between the second and the third Bohr orbit is
Options
(a) 1/2 (b) 1/3 (c) 4/9 (d) 27/5
The wavelength correspending to maximum enregy for hydrogen is 91.2 nm
The wavelength correspending to maximum enregy for hydrogen is 91.2 nm. The corresponding wavelength for He⁺ ion is
Options
(a) 2.28 nm (b) 22.8 nm (c) 182.4 nm (d) 364.8 nm
Correct Answer: […]
According to Bohr’s theory, the angular momentum of electron in 5th orbit is
According to Bohr’s theory, the angular momentum of electron in 5th orbit is
Options
(a) 25 h/π (b) 1.0 h/π (c) 10 h/π (d) 2.5 h/π
Correct Answer:
2.5 h/π
Explanation:
Angular momentum […]
If Nₐ is Avagadro number then number of valence electrons in 4.2g of nitride
If Nₐ is Avagadro number then number of valence electrons in 4.2g of nitride ions (N³⁻) is
Options
(a) 2.4 Nₐ (b) 4.2 Nₐ (c) 1.6 Nₐ (d) 3.2 Nₐ
Correct Answer:
2.4 […]
2.76 g of silver carbonate on being strongly heated yield a residue weighing
2.76 g of silver carbonate on being strongly heated yield a residue weighing
Options
(a) 2.16 g (b) 2.48 g (c) 2.64 g (d) 2.32 g
Correct Answer:
2.16 g
Explanation:
No explanation […]
Which has maximum number of molecules
Which has maximum number of molecules
Options
(a) 7 gm N₂ (b) 2 gm H₂ (c) 16 gm NO₂ (d) 16 gm O₂
Correct Answer:
2 gm H₂
Explanation:
2 gm of H₂ […]
Which of the following electronic configuration an atom has the lowest ionisation
Which of the following electronic configuration an atom has the lowest ionisation enthalpy?
Options
(a) 1s²2s²sp³ (b) 1s²2s²2p⁵3s¹ (c) 1s²2s²2p⁶ (d) 1s²2s²2p⁵
Correct Answer:
1s²2s²2p⁵3s¹
Explanation:
No explanation available. Be the first to write […]
A 5 molar solution of H₂SO₄ is diluted from 1 liter to a volume of 10 litres
A 5 molar solution of H₂SO₄ is diluted from 1 liter to a volume of 10 litres, the normality of the solution will be
Options
(a) 1N (b) 0.1N (c) 5N (d) 0.5N
The ratio of area covered by second orbital to the first orbital is
The ratio of area covered by second orbital to the first orbital is
Options
(a) 1 : 2 (b) 1 : 16 (c) 8 : 1 (d) 16 : 1
Correct Answer:
16 […]