AIIMS Chemistry Some Basic Concepts Of Chemistry Class 11 Questions

The atomic mass of M is 34 and its abundance is 68% and remaining is 32% oxygen. The atomic mass of oxygen is 16. The empirical formula is calculated below. So, the empirical formula is M₂O₂ or MO.

On heating hydrazoic acid form H₂ + 3N₂ as shown in the reaction below. 2N₃H ⟶ H₂ + 3N₂

By going through options, calculate the weight of the given substances.

A chemical reaction: $\text{A} + \text{B} \rightarrow \text{AB}$, $\text{B}$ is acting as limiting reagent then choose the correct option. The limiting reagent is: $\quad \text{A} \quad\quad\quad \text{B}$

Carbon and oxygen forms two compounds. Carbon content in one of them is 42.9% while in the other is 27.3%. The given data is in support with

If at 298 K, the bond energies of C–H, C–C, C=C and H–H bonds are respectively 414, 347, 615 and 435 kJ mol⁻¹, the value of enthalpy change for the reaction: $$\text{H}_2\text{C}=\text{CH}_2(\text{g}) + \text{H}_2(\text{g}) \rightarrow \text{H}_3\text{C}-\text{CH}_3(\text{g})$$ at 298 K will be:

Carbon and oxygen forms two compound. Carbon content in one of them is 42.9% while in the other is 27.3%. The give data is in support with

How much amount of CuSO₄·5H₂O is required for liberation of 2.54 g of I₂ when titrated with KI?

Stomach acid, a dilute solution of HCl in water, can be neutralized by reaction with sodium hydrogen carbonate, NaHCO₃(aq) + HCl(aq) → NaCl(aq) + H₂O(l) + CO₂(g). How many milliliters of 0.125 M NaHCO₃ solution are needed to neutralize 18.0 mL of 0.100 M HCl?

Assertion: S.I. unit of atomic mass and molecular mass is kilograms. Reason: Atomic mass is equal to the mass of 6.023×10²³ atoms.

2.5 g of the carbonate of a metal was treated with 100 ml of 1N H₂SO₄. After the completion of the reaction, the solution was boiled off to expel CO₂ and was then titrated against 1N NaOH solution. The volume of alkali that would be consumed, if the equivalent weight of the metal is 20

Which of the following molecules will not show optical activity?

The weight of one molecule of a compound C₆₀H₁₂₂ is

Assertion : Atoms can neither be created nor destroyed. Reason : Under similar condition of temperature and pressure, equal volume of gases does not contain equal number of atoms.

If 0.189 g of a chlorine containing organic compound gave 0.287 g of silver chloride, then the percentage of chlorine in the organic compound is

12 g of an alkaline earth metal gives 14.8 gm of its nitride. Atomic weight of the metal is

Assertion: Maleic acid shows geometrical isomerism. Reason: It has -C= C- bond.