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1. Chemistry Item 10-03 Which molecule will NOT exhibit hydrogen bonding? A. H 2 O B. NH 3 C. H 3 P D. HF www.upcatreview.com
2. Chemistry Item 10-03 Intermolecular Forces of Attraction ( IMF ) are (weak) attractive forces between molecules. The concept of IMF explains the occurrence of phase changes. The different types of intermolecular forces are differentiated as follows: www.upcatreview.com
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5. Chemistry Item 10-03 London dispersion force and Dipole-dipole interaction are collectively known as VAN DER WAALS FORCES www.upcatreview.com
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7. Chemistry Item 10-03 For question #1, from the concept of London dispersion forces, this type of IMF is present among adjacent non-polar and noble gases. Thus the interaction between and among non-polar molecules is referred to as dispersion forces ( letter A ). www.upcatreview.com
8. Chemistry Item 10-03 For question #2, based on the definition intermolecular forces are also known as weak forces ( letter A ). www.upcatreview.com
9. Chemistry Item 10-03 For item #3 which involves the concept of Hydrogen bond, H-bonding will only occur among molecules where H is bonded to F, O or N. From the options, the molecules H 2 O, NH 3 , and HF will undergo H-bonding because all these molecules have a hydrogen atom attached to either F, N or O. www.upcatreview.com
10. Chemistry Item 10-03 On the contrary, in H 3 P, the H atom is attached to phosphorus (P) and not to F, N, or O thus this molecule will not undergo H-bond. The answer is letter C . www.upcatreview.com
