Stoichiometry MCQ - 2 (Advance) - JEE MCQ

An aqueous solution consisting of 5 M BaCl₂, 58.8% w/v NaCl solution & 2m Na₂ X has a density of 1.949 gm/ml. Mark the option(s) which represent correct molarity (M) of the specified ion.
[Assume 100% dissociation of each salt and molecular mass of X^2– is 96]

Solution(s) containing 30 gm CH₃COOH is/are

A sample of H₂O₂ solution labelled as 56 volume has density of 530 gm/L. Mark the correct option(s)
representing concentration of same solution in other units. (Solution contains only H₂O and H₂O₂)

‘2V’ ml of 1 M Na₂SO₄ is mixed with ‘V’ ml of 2M Ba(NO₃)₂ solution.

One type of artifical diamond (commonly called YAG for yttrium aluminium garnet) can be represented by the formula Y₃Al₅O₁₂ [Y = 89, Al = 27]

Column I    Column II

Element Weight percentage

(A) Y (P) 22.73 %

(B) Al (Q) 32.32 %

(C) O (R) 44.95 %

The recommended daily dose is 17.6 milligrams of vitamin C (ascorbic acid) having formula C₆H₈O₆.

Match the following. Given : N_A = 6 × 10²³

Column I Column II

(A) O-atoms present (P) 10^_4 mole

(B) Moles of vitamin C in 1gm of vitamin C (Q) 5.68 × 10^_3

(C) Moles of vitamin C in 1gm should be consumed daily (R) 3.6 × 10²⁰

At 100° C and 1 atmp, if the density of liquid water is 1.0 g cm^–3 and that of water vapour is 0.0006 g
cm^–3, then the volume occupied by water molecules 1 L of steam at that temperature is:

 How many moles of e^_ weigh one Kg

Calculate the molarity of pure water using its density to be 1000 kg m^_3. [JEE' 2003]

One gm of charcoal absorbs 100 ml 0.5 M CH₃COOH to form a monolayer, and there by the molarity of CH₃COOH reduces to 0.49. Calculate the surface area of the charcoal adsorbed by each molecule of acetic acid. Surface area of charcoal = 3.01 × 10² m²/gm.

Calculate the amount of Calcium oxide required when it reacts with 852 gm of P₄O₁₀.[JEE 2005]

20% surface sites have adsorbed N₂. On heating N₂ gas evolved from sites and were collected at 0.001 atm and 298 K in a container or volume is 2.46 cm³. Density of surface sites is 6.023 × 10¹⁴/cm² and surface area is 1000 cm², find out the no. of surface sites occupied per molecule of N₂.

 Dissolving 120 g of urea (mol. wt. 60) in 1000 g of water gave a solution of density 1.15 g/mL. The molarity of the solution is: [JEE 2011]

Reaction of Br₂ with Na₂CO₃ in aqueous solution gives sodium bromide and sodium bromate with evolution of CO₂ gas. The number of sodium bromide molecules involved in the balanced chemical equation is: [JEE 2011]

 A decapeptide (Mol. wt. 796) on complete hydrolysis gives glycine (Mol. Wt. 75), alanine and phenylalanine. Glycine contributes 47.0% to the total weight tto the hydrolysed products. The number of glycine units present in the decapeptideis : [JEE 2011]