Q. The extra stability of half-filled subshell is due to :
Extra Stability of Half-Filled Subshell | JEE Mains PYQ | Structure of Atom Q. The extra stability of half-filled subshell […]
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Q. Which one of the following about an electron occupying the 1s orbital in a hydrogen atom is incorrect?
Incorrect Statement for 1s Electron | JEE Mains PYQ | Structure of Atom Q. Which one of the following about
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Q. For electrons in ‘2s’ and ‘2p’ orbitals, the orbital angular momentum values, respectively, are
Orbital Angular Momentum for 2s and 2p | JEE Mains PYQ | Structure of Atom Q. For electrons in ‘2s’
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Q. 10 mL of gaseous hydrocarbon on combustion gives 40 mL of CO₂(g) and 50 mL of water vapour. Total number of carbon and hydrogen atoms in the hydrocarbon is ______
Atoms in Hydrocarbon from Combustion Data | JEE Mains PYQ | Mole Concept Q. 10 mL of gaseous hydrocarbon on
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Q. Mass of methane required to produce 22 g of CO₂ after complete combustion is ______ g.
Mass of Methane for CO₂ Formation | JEE Mains PYQ | Mole Concept Q. Mass of methane required to produce
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Q. The quantity which changes with temperature is :
Quantity Changing with Temperature | JEE Mains PYQ | Mole Concept Q. The quantity which changes with temperature is :
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9.3 g of aniline is subjected to reaction with excess of acetic anhydride to prepare acetanilide. The mass of acetanilide produced if the reaction is 100% completed is ______ × 10⁻¹ g.
Acetanilide from Aniline | JEE Mains PYQ | Mole Concept Q. 9.3 g of aniline is subjected to reaction with
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Volume of 3 M NaOH (formula weight 40 g mol⁻¹) which can be prepared from 84 g of NaOH is ______ × 10⁻¹ dm³.
Volume of 3M NaOH Solution | JEE Mains PYQ | Mole Concept Q. Volume of 3 M NaOH (formula weight
UncategorizedA sample of CaCO₃ and MgCO₃ weighed 2.21 g is ignited to constant weight of 1.152 g.
A sample of CaCO₃ and MgCO₃ weighed 2.21 g is ignited to constant weight of 1.152 g.
The composition of mixture is :
(Given molar mass in g mol⁻¹ : CaCO₃ : 100, MgCO₃ : 84)
Composition of CaCO₃–MgCO₃ Mixture | JEE Mains PYQ | Mole Concept Q. A sample of CaCO₃ and MgCO₃ weighing 2.21
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The molarity of 1 L orthophosphoric acid (H₃PO₄) having 70% purity by weight (specific gravity 1.54 g cm⁻³) is ______ M
Orthophosphoric Acid Molarity | JEE Mains PYQ | Mole Concept Q. The molarity of 1 L orthophosphoric acid (H₃PO₄) having