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:
No explanation available. Be the first to […]
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 :
Options
(a) 8 (b) 16 (c) 32 (d) 4
Correct Answer:
16
Explanation:
Total number of atomic orbits […]
The density of air is 0.001293 g/cc at STP. Its vapour density is
Options
(a) 0.001293 (b) 8.2786 (c) 14.49 (d) 6.2706
Correct Answer:
14.49
Explanation:
At STP, 22.4 litres of gas is equal […]
Maximum number of electrons in a subshell with l=3 and n=4 is
Options
(a) 14 (b) 16 (c) 10 (d) 12
Correct Answer:
14
Explanation:
n = main energy level / = subshell […]
For azimuthal quantum number l= 3,the maximum number of electrons will be
Options
(a) 2 (b) 6 (c) 0 (d) 14
Correct Answer:
14
Explanation:
l= 3 means f-subshell. Maximum no. of electrons […]
Boron has two stable isotopes, ¹°B(19%) and ¹¹B(81%). Average atomic weight for boron in the periodic table is
Options
(a) 10.8 (b) 10.2 (c) 11.2 (d) 10
Correct Answer:
10.8
Explanation:
Avg Atomic […]
1.520 g of hydroxide of a metal on ignition gave 0.995 g of oxide. The equivalent weight of metal is
Options
(a) 1.52 (b) 0.995 (c) 190 (d) 9
Correct Answer:
9
Explanation:
One […]
If principal quantum number n=4, the total number of orbitals having l=3 is
Options
(a) 3 (b) 7 (c) 5 (d) 9
Correct Answer:
7
Explanation:
For n= 4, /= 3 (f-subshell) no. […]
At S.T.P the density of CCl₄ vapours in g/L will be nearest to
Options
(a) 6.87 (b) 3.42 (c) 10.26 (d) 4.57
Correct Answer:
6.87
Explanation:
Molecular Weight of CCl₄ = 35.5 + […]
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