Q57.When 12. 2 g of benzoic acid is dissolved in 100 g of water, the freezing point of solution was found to be −0. 93 °C(Kf(H2O) = 1. 86 K kg mol−1). The number (n) of benzoic acid molecules associated (assuming 100% association) is _.
What This Question Tests
This question tests the fundamental knowledge of solid-state structures, specifically the relationship between the number of lattice sites and octahedral voids in a close-packed arrangement.
Concepts Tested
Formulas Used
Number of octahedral voids = Number of atoms (N) in close packing
📚 NCERT Sections This Tests
1.32 — Calculate The Depression In The Freezing Point Of Water When 10 G Of
Chemistry Class 11 · Chapter 1
1.32 Calculate the depression in the freezing point of water when 10 g of CH3CH2CHClCOOH is added to 250 g of water. Ka = 1.4 × 10–3, Kf = 1.86 K kg mol–1. 1.33 19.5 g of CH2FCOOH is dissolved in 500 g of water. The depression in the freezing point of water observed is 1.00 C. Calculate the van’t Hoff factor and dissociation constant of fluoroacetic acid.
1.30 — Calculate The Amount Of Benzoic Acid (C6H5Cooh) Required For Preparing 250
Chemistry Class 11 · Chapter 1
1.30 Calculate the amount of benzoic acid (C6H5COOH) required for preparing 250 mL of 0.15 M solution in methanol.
1.31 — The Depression In Freezing Point Of Water Observed For The Same Amount Of
Chemistry Class 11 · Chapter 1
1.31 The depression in freezing point of water observed for the same amount of acetic acid, trichloroacetic acid and trifluoroacetic acid increases in the order given above. Explain briefly.
📋 Question Details
- Chapter
- Solid State
- Topic
- Voids in close packing
- Year
- 2021
- Shift
- 26 Feb Shift 2
- Q Number
- Q57
- Type
- Numerical
- NCERT Ref
- Class 12 Chemistry Ch 1: The Solid State
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