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What is the correct electron domain geometry and molecular geometry of NCl3? A. Trigonal planar electron domain geometry, trigonal planar molecular geometry B. Tetrahedral electron domain geometry, trigonal pyramidal molecular geometry C. Trigonal…
The three isomers of C4H8O in the table have the same molar mass. What is the reason for the increase in boiling points? A. Increase in the number of covalent bonds per molecule B. Increase in molar mass C. Increase in the strength of intermolecular…
A mixture of compounds X and Y is separated by thin layer chromatography. The chromatogram is shown. Which option is consistent with this chromatogram? A. RF of Y is 0.80; compound Y is more attracted to the mobile phase B. RF of X is…
Which species contains a coordination bond? A. BCl3 B. PH3 C. [NH4]+ D. HCOO−
Which electrostatic attraction holds the two atoms together in a molecule of hydrogen, H2? A. Between the two nuclei B. Between the two electrons of the shared pair C. Between neighbouring hydrogen molecules D. Between each nucleus and the shared pair…
Which list places the metals in order of increasing strength of metallic bonding, from weakest to strongest? A. Rb, K, Sr, Ca B. K, Rb, Ca, Sr C. Sr, Ca, Rb, K D. Ca, Sr, K, Rb
Which molecules are polar? I. CHCl3 II. CH2F2 III. CF4 A. I and II only B. I and III only C. II and III only D. I, II and III
What is the formula of the compound formed from calcium ions and phosphate ions? A. CaPO4 B. Ca3(PO4)2 C. Ca2(PO4)3 D. Ca3PO4
A section of the chain of an addition polymer is drawn below. From which monomer is this polymer made? A. CH2=CHCH2CH3 B. CH3CH2CH2CH3 C. CH3CH=CHCH3 D. (CH3)2C=CH2
Which classification is correct? A. Alkali metal: rubidium; transition element: platinum; halogen: xenon; noble gas: bromine B. Alkali metal: rubidium; transition element: platinum; halogen: bromine; noble gas: xenon C. Alkali metal: platinum; transition…