What is the value of electron gain enthalpy of Na+ if IE₁ of Na =5.1 eV ?
What is the value of electron gain enthalpy of Na+ if IE₁ of Na =5.1 eV ?
Options
(a) –5.1 eV (b) –10.2 eV (c) +2.55 eV (d) +10.2 eV
Correct Answer:
–5.1 […]
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The energy of an electron in the nth Bohr orbit of hydrogen atom is
The energy of an electron in the nth Bohr orbit of hydrogen atom is
Options
(a) –(13.6/n⁴)eV (b) –(13.6/n³)eV (c) –(13.6/n²)eV (d) –(13.6/n)eV
Correct Answer:
–(13.6/n²)eV
Explanation:
No explanation available. Be the first […]
The energy of second Bhor orbit of the hydrogen atom is -328 kJ mol⁻¹, hence the enregy
The energy of second Bhor orbit of the hydrogen atom is -328 kJ mol⁻¹, hence the enregy of fourth Bohr orbit would be
Options
(a) -41 kJ mol⁻¹ (b) -1312 kJ mol⁻¹ (c) […]
The number of moles of KMnO₄ that will be needed to react with one mole of
The number of moles of KMnO₄ that will be needed to react with one mole of sulphite ion in acidic solution is
Options
(a) 4/5 (b) 2/5 (c) 1 (d) 3/5
Correct Answer:
2/5
The equivalent weight of phosphoric acid(H₃PO₄) in the reaction
The equivalent weight of phosphoric acid(H₃PO₄) in the reaction, NaOH + H₃PO₄ → NaH₂PO₄ + H₂O is
Options
(a) 59 (b) 49 (c) 25 (d) 98
Correct Answer:
98
Explanation:
NaOH + H₃PO₄ […]
What is the equivalent weight of SnCl₂ in the following reaction
What is the equivalent weight of SnCl₂ in the following reaction, SnCl₂+Cl₂→ SnCl₄?
Options
(a) 95 (b) 45 (c) 60 (d) 30
Correct Answer:
95
Explanation:
Equivalent weight of SnCl₂= mol. wt./2 = […]
0.037g of an alcohol, R-OH was added to C₂H₅Mgl and the has evolved measured 11.2cc
0.037g of an alcohol, R-OH was added to C₂H₅Mgl and the has evolved measured 11.2cc at STP. The molecular mass of R-OH will be
Options
(a) 47 (b) 79 (c) 77 (d) 74
The equivalent weight of H₃PO₂, when it disproportionates into PH₃ and H₃PO₃ is
The equivalent weight of H₃PO₂, when it disproportionates into PH₃ and H₃PO₃ is
Options
(a) 82 (b) 61.5 (c) 41 (d) 20.5
Correct Answer:
61.5
Explanation:
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If the equivalent weight of an element is 32, then the percentage of oxygen
If the equivalent weight of an element is 32, then the percentage of oxygen in its oxide is
Options
(a) 16 (b) 40 (c) 32 (d) 20
Correct Answer:
20
Explanation:
Equi. Wt […]
The total number of atomic orbitals in fourth energy level of an atom is :
The total number of atomic orbitals in fourth energy level of an atom is :
Options
(a) 8 (b) 16 (c) 32 (d) 4
Correct Answer:
16
Explanation:
Total number of atomic orbits […]