Chemistry Question Bank

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HARDMCQ SINGLEJEE Advanced ChemistryInorganic Chemistryp -Block Elements (group 15-18)

NH₄NO₂ NH₄NO₂ on heating gives

HARDMCQ SINGLEJEE Advanced ChemistryInorganic Chemistryp -Block Elements (group 15-18)

In the cationic parts of solid N₂O₅ and solid N₂O₄, the bond order of N–O are, respectively,

HARDMCQ SINGLEJEE Advanced ChemistryInorganic Chemistryp -Block Elements (group 15-18)

When AgNO₃ is heated strongly above 800°C, it produces

HARDMCQ SINGLEJEE Advanced ChemistryInorganic Chemistryp -Block Elements (group 15-18)

Pure nitric acid is a colourless liquid, but on exposure to light it turns brownish due to

HARDMCQ SINGLEJEE Advanced ChemistryInorganic Chemistryp -Block Elements (group 15-18)

Which of the following compounds give NH₃ on heating? (I) NH₄NO₃ (II) NH₄NO₂ (III) (NH₄)₂ Cr₂O₇ (IV)(NH₄)₂CO₃ (V) Mg (NH₄) PO₄

HARDMCQ SINGLEJEE Advanced ChemistryInorganic Chemistryp -Block Elements (group 15-18)

N₂ is passed through overheated CaC₂. Which of the following options is correct for the product formed? (I) State of hybridization of C is sp. (II) Urea is an intermediate formed during hydrolysis of the above product…

HARDMCQ SINGLEJEE Advanced ChemistryInorganic Chemistryp -Block Elements (group 15-18)

Which of the following compounds does not form ammonia on heating?

HARDMCQ SINGLEJEE Advanced ChemistryInorganic Chemistryp -Block Elements (group 15-18)

The best reducing agent among the following is

HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent Concept

Assertion: Equivalent weight of a base molecular weight = acidity Reason: Acidity is the number of replaceable hydrogen atom in one molecule of the base.

HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent Concept

Volume of acid that contains 63g pure acid is.

HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent Concept

Assertion :Both 12g of carbon and 27g of aluminium contain 6.023 × 1023 atoms. Reason :Molar mass of an element contains Avogadro number of atoms.

HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent Concept

A solution of NaOH is prepared by dissolving 4.0 g of NaOH in 1 L of water. Calculate the volume of the HCl gas at STP that will neutralize 50 mL of this solution.

HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent Concept

Assertion :Pure water obtained from different states of India always contains hydrogen and oxygen in the ratio of 1 : 8 by mass. Reason: Total mass of reactants and products during chemical change is always the same.

HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent Concept

The total number of electrons present in 18 ml of water (density of water is 1 g ml–1) is

HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent Concept

Assertion :Number of molecules present in SO₂ is twice the number of molecules present in O₂. Reason : Molecular mass of SO₂ is double to that of O₂.

HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent Concept

Volume of water required to make 1N solution from 2 mL conc. HNO₃.

HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent Concept

Normality of acid is.

HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent Concept

HCl is 80% ionised in 0.01 M aqueous solution. The equilibrium molarity of HCl in the solution is

HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent Concept

The molarity of 68 % of H₂SO₄ whose density is 1.84 g/cc is

HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent Concept

Calculate the analytical molarity of Cl– ion in solution which is prepared by mixing 100 ml of 0.1 M NaCl and 400 ml of 0.01 M BaCl₂.

HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent Concept

The following process has been used to obtain iodine from oil-field brines in California. NaI + AgNO₃ → AgI + NaNO₃ AgI + Fe → FeI₂ + Ag FeI₂ + Cl₂ → FeCl₃ + I₂ If 381 kg of iodine is produced per hour then mass of A…

HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent Concept

NX is produced by the following step of reactions M + X2 → M X2 MX2 + X2 → M3X8 M3X8 + N₂CO₃ → N X + CO₂ + M3O₄ How much M (metal) is consumed to produce 206 gm of NX. (Take At. wt of M = 56, N=23, X = 80)

HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent Concept

Assertion : 1mole of H₂SO₄ is neutralised by 2 moles of NaOH but 1 equivalent of H₂SO₄ is neutralised by 1 equivalent of NaOH. Reason : Equivalent weight of H₂SO₄ is half of its molecular weight while e…

HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent Concept

Assertion :For a binary solution of two liquids, A and B, with the knowledge of density of solution, molarity can be converted into molality. Reason: Molarity is defined in terms of volume and molality …

HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent Concept

Assertion : If 30 mL of H₂ and 20 mL of O₂ react to form water, 5 mL of H₂ is left at the end of the reaction Reason :H₂ is the limiting reagent.

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