A Electron affinity
B Ionization energy
C Electronegativity
D Lattice energy
Explanation: Ionization energy is the minimum energy required to remove the most loosely bound electron from a gaseous atom.
A Methanoic acid
B Ethanoic acid
C Propanoic acid
D Ethanal
Explanation: CH3COOH has a two-carbon chain with a carboxyl group, giving it the IUPAC name ethanoic acid.
A 0.5 mole
B 1 mole
C 2 moles
D 1.5 moles
Explanation: CaCO3 to CaO + CO2 is a 1:1 reaction, so 1 mole produces 1 mole of CO2.
Explanation: KMnO4 contains Mn in +7 oxidation state and readily accepts electrons, making it a strong oxidizing agent.
A 11.2 L
B 22.4 L
C 44.8 L
D 2.24 L
Explanation: At standard temperature and pressure, 1 mole of an ideal gas occupies 22.4 L.
A Ethanal
B Ethyl ethanoate
C Diethyl ether
D Ethanol
Explanation: Ethanol reacts with ethanoic acid in esterification to form ethyl ethanoate and water.
A Principal (n)
B Azimuthal (l)
C Magnetic (ml)
D Spin (ms)
Explanation: The azimuthal quantum number l determines the shape of an electron orbital (s, p, d, f).
A 1 mole
B 2 moles
C 3 moles
D 4 moles
Explanation: Molar mass of water is 18 g/mol, so 36 g divided by 18 g/mol equals 2 moles.
Explanation: In NaCl, each Na+ ion is surrounded by 6 Cl- ions and vice versa, giving coordination number 6.
Explanation: C4H10 has two chain isomers: n-butane (straight chain) and isobutane (branched chain).
A NaCl
B NaOH
C H2O
D CH4
Explanation: NaOH has an ionic bond between Na+ and OH-, and covalent bonds between O and H.
A Negative, meaning energy is absorbed
B Positive, meaning energy is released
C Zero
D Infinite
Explanation: Chlorine has a high positive electron affinity, meaning it releases energy when gaining an electron.
A Bent
B Trigonal planar
C Tetrahedral
D Pyramidal
Explanation: BF3 has three bond pairs and no lone pairs on boron, giving a trigonal planar geometry.
A NH3
B NaOH
C CH3COOH
D H2CO3
Explanation: NaOH completely dissociates in water to produce OH- ions, making it a strong base.
A Decrease in temperature
B Increase in concentration
C Increase in particle size
D Removal of catalyst
Explanation: Increasing reactant concentration raises the frequency of effective collisions, increasing rate.
A Propan-1-ol
B Propan-2-ol
C 2-Methylpropan-1-ol
D Butan-2-ol
Explanation: The hydroxyl group is on carbon 2 of a three-carbon chain, giving propan-2-ol.
A Ethanol
B Ethylene glycol
C Methanol
D Propanol
Explanation: Ethylene glycol lowers the freezing point of water and is commonly used as an antifreeze.
A 6.022 x 10^23
B 1.2044 x 10^24
C 3.011 x 10^23
D 6.022 x 10^24
Explanation: One mole of O2 contains 2 moles of oxygen atoms, which is 2 x 6.022 x 10^23 atoms.
A Methanol
B Ethanol
C Propanol
D Butanol
Explanation: Ethanol has a two-carbon chain with a hydroxyl group, giving it the IUPAC name ethanol.
A 16 g/mol
B 20 g/mol
C 18 g/mol
D 22 g/mol
Explanation: Water has 2 hydrogen atoms (2 g/mol) and 1 oxygen atom (16 g/mol) totaling 18 g/mol.