1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ede4ka [16]
3 years ago
7

Question 1: Which of the following statement is false about conjugated systems?

Chemistry
1 answer:
valkas [14]3 years ago
8 0

Answer:

A conjugated system can only contain two alkenes: False

B. A cumulated diene is less stable than an isolated diene.

False

Explanation:

A. A conjugated system is more stable than an unconjugated system.: True

Due to resonance a conjugated system is more stable.

B. The s-trans isomer is favored over the s-cis isomer.: True

Due to repulsion in s-cis isomer they are less stable.

C. A conjugated system has multiple resonance structures. True

This is the reason they are stable.

D. A conjugated system can only contain two alkenes: False

A conjugated system may have may alternate double and triple bonds.

2) A trans alkene releases less heat upon hydrogenation than a cis alkene.

True

Trans alkenes are more stable than cis alkene. Thus heat of hydrogenation of trans alkene is less than cis alkene.

B. A cumulated diene is less stable than an isolated diene.

False

C. Multiple products can always form when treated a conjugated diene with HBr.  True

There can be 1,2 or 1,4 addition

D. Conjugated systems arise only between sp2-hybridized atoms.

True

Conjugation allows resonance which is possible in sp2 systems

E. Conjugated double bonds involve unhybridized p-orbitals aligned with each other

True

The double bond is formed as pi bond due to side ways overlapping of unhybridized p orbitals

You might be interested in
Aqueous solutions of isopropyl alcohol are commonly sold as rubbing alcohol. The boiling point of isopropyl alcohol is 82.4 °C.
Monica [59]

Answer:

This is due to more hydrogen bonding in ethylene glycol than it is in isopropyl alcohol

Explanation:

The boiling point of isopropyl alcohol is 82.4 °C it contains only a single OH group, hence intermolecular hydrogen bonding is solely responsible for it's boiling point, whereas Ethylene glycol (CH2OHCH2OH) contains 2-OH group and both intermolecular and intramolecular hydrogen bonding are responsible for the higher boiling point of ethylene glycol at 198 °C.

8 0
3 years ago
_____ is the measurement of the density of a substance as compared to water.
alexgriva [62]
Answer: Specific gravity
8 0
3 years ago
What is a chemical off of the periodic table that is sticky
Alex73 [517]
I think it’s the one that has a Br
3 0
3 years ago
Read 2 more answers
When ionic solids dissolve in water, they produce soluble aqueous cations and anions. For example, adding MgBr2 solids to water
worty [1.4K]

Answer:

Al(NO3)3(s)--------> Al^3+(aq) + 3NO3^-(aq)

Explanation:

The equation shown above describes the dissolution of Al(NO3)3 in water using the lowest coefficients.

This occurs when solid Al(NO3)3 is added to water. It dissolves to give rise to ions as shown. This is a property of all ionic substances.

6 0
3 years ago
Na is best known as a(n):
Lady bird [3.3K]

Answer:0

Explanation:

tfnjgjvtjgjvjv

8 0
3 years ago
Read 2 more answers
Other questions:
  • A solution with higher pH levels is more
    8·2 answers
  • 2Na3N3 -&gt; 2Na + 3N2<br><br> if 0.58 mol if NaN3 reacts, what mass of nitrogen would result
    11·1 answer
  • What happens to earth materials when water flows over landforms?
    11·1 answer
  • Which of the following are chemicals?
    9·1 answer
  • Plz tell me if I'm correct I am terrible at science if I'm not correct me plz correct me!!! I promise I'll give brainliest!!! Oh
    8·1 answer
  • This characteristic of a sound wave changes as the volume of the sound wave changes
    12·2 answers
  • Sketch the titration curve for the titration of a generic weak base B with a strong acid. The titration reaction is
    6·1 answer
  • A solvent typically boils at 125.0∘C and a solution made from that solvent boils at 128.5∘C. If this solvent has a Kb value of 2
    9·1 answer
  • .. A simple circuit needs a source of____such as a battery<br>​
    6·1 answer
  • Name the three functional groups in the compound pictured.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!