Boron has two stable isotopes, ¹°B(19%) and ¹¹B(81%). Average atomic weight
Boron has two stable isotopes, ¹°B(19%) and ¹¹B(81%). Average atomic weight for boron in the periodic table is Options (a)…
8 years ago
Chemistry
1.520 g of hydroxide of a metal on ignition gave 0.995 g of oxide
1.520 g of hydroxide of a metal on ignition gave 0.995 g of oxide. The equivalent weight of metal is…
8 years ago
If principal quantum number n=4, the total number of orbitals having l=3 is
If principal quantum number n=4, the total number of orbitals having l=3 is Options (a) 3 (b) 7 (c) 5…
8 years ago
At S.T.P the density of CCl₄ vapours in g/L will be nearest to
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…
8 years ago
Maximum number of H-bonds in one molecule of water is
Maximum number of H-bonds in one molecule of water is Options (a) 1 (b) 2 (c) 3 (d) 4 Correct…
8 years ago
In the final answer of the expression (29.2 – 20.2) (1.79 x 10⁵) / 1.37. The number
In the final answer of the expression (29.2 - 20.2) (1.79 x 10⁵) / 1.37. The number of significant figures…
8 years ago
What is the maximum number of electrons that can be associated with the following
What is the maximum number of electrons that can be associated with the following set of quantum numbers? n=3, l=1…
8 years ago
0.45 g acid of molecular weight 90 was neutralise by 20 mL of 0.5 N KOH
0.45 g acid of molecular weight 90 was neutralise by 20 mL of 0.5 N KOH. The basicity of acid…
8 years ago
Number of unpaired electrons in N2⁺ is
Number of unpaired electrons in N2⁺ is Options (a) 2 (b) 0 (c) 1 (d) 3 Correct Answer: 1Explanation:N(7) =…
8 years ago
The number of nodal planes in pₓ is
The number of nodal planes in pₓ is Options (a) 1 (b) 2 (c) 3 (d) 0 Correct Answer: 1Explanation:The…
8 years ago