Chemistry

Organic Chemistry Fundamentals

287 Questions

Organic chemistry fundamentals cover the structure, properties, and reactions of carbon containing compounds. The questions explore functional groups, isomerism, homologous series, and basic reaction mechanisms. This forms the basis of general chemistry across multiple examination formats.

Functional groupsIsomerism typesHomologous seriesCycloalkanesOrganic monomers

Organic Chemistry Fundamentals Questions

Multiple choice chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

Identify $(E)$ and $(F)$ in the following:
$CaCO _3\rightarrow \underset{(g)}{(A)}+\underset{(solid)}{(B)}$

$(B)+H _2O\rightarrow (C)\overset{(A)}{\rightarrow}(D)\overset{(A)excess}{\rightarrow}(E)$

$(A)+NH _3\overset{\Delta}{\rightarrow}(F)$

  1. $(E)\ Ca(HCO _3) _2;\ (F)\ NHCONH _3$
  2. $(E)\ Ca(HCO _3); \ (F)\ NH _3CONH$
  3. $(E) \ Ca(HCO _3) _2; \ (F)\ NH _2CONH _2$

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

$CaCO _3\rightarrow \underset{(g)}{CO _2}+\underset{(solid)}{CaO}$
$CaO+H _2O\rightarrow (Ca(OH) _2)\overset{(CO _2)}{\rightarrow}(CaCO _3)\overset{(CO _2)excess}{\rightarrow}(Ca(HCO _3) _2)$
$(CO _2)+NH _3\overset{\Delta}{\rightarrow}(NH _2CONH _2)$
Hence option C is correct.

Multiple choice

A molecule has ________________.

  1. 2 or more elements

  2. 2 or more atoms

  3. 2 or more substances

  4. 2 or more motions
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A molecule is defined as a group of two or more atoms held together by chemical bonds. It can consist of atoms of the same element or different elements.

Multiple choice

All organic compounds contain which element?

  1. Oxygen

  2. Helium

  3. Phosphorus

  4. Carbon
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Organic chemistry is defined by the study of carbon-based compounds. Carbon's ability to form stable, complex chains is the basis for all known life.

Multiple choice

All organic compounds contain the element

  1. carbon

  2. hydrogen

  3. oxygen

  4. nitrogen
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Organic chemistry is defined by the study of carbon-based compounds. Carbon's ability to form stable bonds with many other elements makes it the foundation of life.

Multiple choice

Carbon is considered to be the

  1. Element of Life

  2. Element of Water

  3. The poison of Life
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbon is often referred to as the element of life due to its central role in the molecules that make up living organisms.

Multiple choice

CH4

  1. carbon hydride

  2. methane

  3. carbon hydrogen

  4. carbon tetrahydride
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

CH4 is the chemical formula for methane, the simplest alkane and the primary component of natural gas.

Multiple choice some important compounds of magnesium and calcium the s-block elements chemistry

Product (S) are :

$Mg _2C _3 {\xrightarrow []{D _2O} } \,\, { \xrightarrow[2.H _2O/\bar{O}H]{1.BH _3.THf}} \,\,{\xrightarrow {H _2/Ni} }\,\, \xrightarrow[\Delta]{Conc.H _3PO _4} (S)$

  1. ${\text{H}}\mathop {\text{C}}\limits _{\mathop {\text{D}}\limits^{\text{|}} } = {\text{CH - C}}{{\text{D}} _{\text{3}}}$
  2. ${{\text{H}} _2}\mathop {\text{C}}\limits _{\mathop {\text{D}}\limits^{\text{|}} } - {\text{CH}}\;{\text{ = }}\;{\text{C}}{{\text{D}} _2}\;\;$
  3. ${{\text{H}} _{\text{2}}}{\text{C}}\; = {\text{CH - C}}{{\text{H}} _{\text{3}}}$
  4. ${{\text{H}} _{\text{2}}}{\text{C}} = \mathop {\text{C}}\limits _{\mathop {\text{D}}\limits^{\text{|}} } - {\text{C}}{{\text{H}} _{\text{3}}}$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mg2C3 reacts with D2O to form propyne-d4 (CH3-C=CD). Hydroboration-oxidation adds OH and H across the triple bond, followed by reduction and dehydration, leading to the specified product structure.

Multiple choice bio-chemistry biological molecule lipids and their function some biomolecules lipids

Number of double bonds present in arachidonic acid is

  1. $4$
  2. $3$
  3. $2$
  4. $1$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Arachidonic acid is a carboxylic acid which has 20 carbon and four double bonds in the cis configuration. It is a polyunsaturated fatty acid (PUFA). It is mainly present in the membrane phospholipids and in platelets. It is also found in liver, erythrocytes, skeletal muscle, cardiac muscle. Meat, egg, and fish are rich sources of arachidonic acid.

Thus, the correct answer is option A.

Multiple choice

What is the general formula for an alkene?

  1. CnH2n

  2. CnH2n+2

  3. CnH2n-2

  4. CnH2n+4
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Alkenes are hydrocarbons with one double bond between carbon atoms. The general formula for an alkene is CnH2n, where n is the number of carbon atoms.

Multiple choice

What is the general formula for an alkyne?

  1. CnH2n

  2. CnH2n+2

  3. CnH2n-2

  4. CnH2n+4
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Alkynes are hydrocarbons with one triple bond between carbon atoms. The general formula for an alkyne is CnH2n-2, where n is the number of carbon atoms.

Multiple choice

What is the name of the functional group that contains a carbon-nitrogen double bond?

  1. Amine

  2. Amide

  3. Imine

  4. Nitrile
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Imines are functional groups that contain a carbon-nitrogen double bond. They are characterized by the presence of the C=N bond.