question archive 1)The three-dimensional shape around a single-bonded carbon atom is a) Linear b) Trigonal planar c) Tetrahedral d) Pyramidal 2
1)The three-dimensional shape around a single-bonded carbon atom is a) Linear b) Trigonal planar c) Tetrahedral d) Pyramidal 2
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1)The three-dimensional shape around a single-bonded carbon atom is
a) Linear
b) Trigonal planar
c) Tetrahedral
d) Pyramidal
2. The polymerization of propene, CH3CH=CH2 can be classified as
a) hydrolysis reaction
b) an elimination reaction
c) a substitution reaction
d) an addition reaction
3. the chemical reaction between an organic acid and an alcohol is known as:
a) saponification
b) hydrogenation
c) hydrolysis
d) esterification
4. The oxidation of an aldehyde produces?
a) An alcohol
b) A carboxylic acid
c) A ketone
d) A halogen
5. The alkyl radical C6H12 is called
a) Heptyl
b) Hexyl
c) Heptanyl
d) Hexanyl
6. When an alkene is hydrated the product is a (n):
a) Acid
b) Aldehyde
c) Ketone
d) Alcohol
7. From the results of the "Gold Foil Experiment", Rutherford concluded that atoms contain very small nuclei because:
a) The alpha particles were small.
b) A low percentage of alpha particles went straight through the foil.
c) A small number of alpha particles were deflected through the large angles
d) Gold is such a heavy element
8. Who postulated that electrons can only make certain energy jumps from level to level?
a) Bohr
b) Moseley
c) Rutherford
d) Schroedinger
9. In modern chemical theory an occupied orbital is pictured to be:
a) A spherical or dumbbell-shaped route traced by the electron in its rapid movement
b) A region in space having a precise shape, which is completely filled by a dense electron cloud
c) A region of space in which the probability of finding an electron is high
d) An elliptical pathway, outside the nucleus followed by an electron
10.For the valence shell, the correct representation of carbon in its ground state is
a) 2s22p4
b) 1s22s22p2
c) 2s22p2
d) 3s23p4
11.Which of the following atoms in the ground state, would contain an electron with the quantum numbers?
n=3 l = 1 m=1 ml= +1/2
a) Na
b) O
c) F
d) Ne
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1) c)Tetrahedral
2) d) an addition reaction
3) d) esterification
4) b) A carboxylic acid
5) b) Hexyl
6) d) Alcohol
7) c) A small number of alpha particles were deflected through the large angles
8) a) Bohr
9) c) A region of space in which the probability of finding an electron is high
10) c) ?2s22p2?
11) d) Ne
1) Tetrahedral forms a 3D structure with carbon at the center.
2)Polymerisation happens when monomers are added building up the polymer chain. Propene follows addition polymerization.
3) An carboxylic acid treated with alcohol with an acid catalyst forms ester and water as products.
?CH3?COOH+CH3?CH2?COOH→CH3?COOCH2?CH3??
4)Oxidation of aldehyde leads to carboxylic acid. They form hydrogen bonds with the carbonyl oxygen forming acids.
5)Since ?C6?H12?? is an alkyl, with 6 carbon atoms it can be called as hexyl.
6) Genera equation for hydration of alkene is ?RRCH=CH2?+H2?O/acid→RRCH(−OH)−CH? which forms an alcohol.
7) In the gold foil experiment, alpha particles were incident on the gold foil where most of the alpha particles are said to pass the foil without any deflection.Some of them deflected at large angles which made him realize the presence of dense nucleus at the center.
8) Bohr was the first person to suggest that electron of a corresponding atom jumps to and fro corresponding the energy supplied to it.
9) An orbital is an imaginary line which represents the high probability of finding an electron of a particular shell.
10) The electronic configuration of carbon is ?1s22s22p2? .The n represents the shell where the valence electrons are located.Here n=2, has valence electrons of 4 with the configuration of ?2s22p2?
11) The principal quantum number of n=3 can be seen only in the sodium atom.Thus the only atom could be sodium.Other elements does not involve n=3 as it stops in n=2.
