Multiple choice What is the effect of pressure on NaCl crystal's coordination number? Decreases from 6:6 to 4:4 Increases from 6:6 to 8:8 Remains same First decrease then increases First increase then decreases Reveal answer Fill a bubble to check yourself B Correct answer Explanation Increases from 6:6 to 8:8 as NaCl structure gets converted to CsCl structure.