Organic Chem I A potential energy diagram (distance between nuclei vs potential

Question

Organic Chem I A potential energy diagram (distance between nuclei vs potential energy, see Fig 1 9 in your text) can be drawn to represent the potential energy when the 1s orbitals of two Hydrogen atoms overlap. The distance between the Hydrogen nuclei at which the potential energy is at a minimum is the a distance at which the anti-bonding molecular orbital is occupied b distance at which no attraction exists between the two atoms c distance at which the attraction between the two atoms is at a minimum d normal bond length for H_2. The result of the hybridization of the 2s. 2p.. and 2p, but not including the 2pz orbital of a carbon atom is: a four sp^3 orbitals b three sp^3 orbitals c two sp^2 orbitals d three sp^2 orbitals e none of the above 3. The result that is formed when a 2pz orbital of one Carbon atom overlaps with the 2pz orbital of another Carbon atom is called a(n): a. ionic bond b. pi (pi) bond c. sigma (sigma) bond d. sp^3 orbital. Identify the atomic orbitals in the C-C sigma (sigma) bond in ethane (H_2C=CH_2). a (2sp, 2sp) b. (2sp, 1s) c. (2SP^3, 2sp^3) d. (2sp^2 2sp^2) e (2p_z, 2p_z) 5. In which molecule is the central atom sp^3 hybridized? a H_2O b H_2C=CH_2 c. CH_2O d. all of the above e. two of the above 6 Which of the following compounds can exist as cis/trans isomers? a Br_2C=CBrCI b. CH_2=CH_2 C. Br_2C=CHBr d. CH_2=CHBr e. BrCH=CHCI A compound has the empirical formula. CH_2. Data shows its molecular weight is 72 plusminus 3 What is the molecular formula for the compound? a C_2H_4 b C_3H_6 c. C_4H_8 d. C_5H_10 e. C_6H_12

Explanation / Answer

1. d (normal bond length of hydrogen)

2. d (it forms 3 sp2 hybrid orbitals)

3. b

4. d

5. a ( Here oxygen undergo SP3 hybridization)

6.e(in cis both hydrogens are on same side, in trans hydrogens are on opposite side)

7. d( Its molecular weight is 70.1, c=C5H10)

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