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
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 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, 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
Options
(a) 1 : 2 (b) 1 : 16 (c) 8 : 1 (d) 16 : 1
Correct Answer:
16 […]
The maximum number of molecules is present in
Options
(a) 15 L of H₂ gas at STP (b) 5L of N₂ gas as STP (c) 0.5 g of H₂ gas (d) 10 g […]
Amount of calcium oxide required, when it reacts with 852 g of P₄O₁₀ is
Options
(a) 100g (b) 1008g (c) 108g (d) 1050g
Correct Answer:
1008g
Explanation:
6CaO + P₄O₁₀ →2Ca₃(PO₄)₂ 6(40+ 16) […]
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 […]
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