Organic Chemistry

Q.

What is the meaning of "vital force theory" in organic chemistry?

Q.

Name the scientist who disproved the 'vital force theory' for the formation of organic compounds.

Q.

What Is The First Member Of Alkene Series?

Q. Which was the first organic compound synthesised in laboratory and by whom?

Q.

Identify the unsaturated compounds from the following $\left(\mathrm{i}\right)$ Propane $\left(\mathrm{ii}\right)$ Propene $\left(\mathrm{iii}\right)$ Propyne $\left(\mathrm{iv}\right)$ Chloropropane

1. $\left(\mathrm{i}\right),\left(\mathrm{ii}\right)$

2. $\left(\mathrm{ii}\right),\left(\mathrm{iv}\right)$

3. $\left(\mathrm{iii}\right),\left(\mathrm{iv}\right)$

4. $\left(\mathrm{ii}\right),\left(\mathrm{iii}\right)$

Q. Question 27
The heteroatoms present in
$C{H}_3—C{H}_2—O—C{H}_2—C{H}_{2}Cl$ are
​​​​​​
(i) oxygen
(ii) carbon
(iii) hydrogen
(iv) chlorine

(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iv)

Q.

Name the First member of alkane series

Q.

The organic compound prepared by Wohler from an inorganic compound called ammonium cyanate was :
(a) glucose (b) urea (c) uric acid (d) vinegar

Q. According to Vital Force Theory, the organic compounds are formed and synthesized only within living species.

1. True
2. False

Q. (b) What is the Vital force theory? Why was it discarded?

Q. Fill in the blanks:
(i) Organic compounds are essentially __________ compounds. They show _________ reaction and their rates are ___________.
(ii) One of the products of combustion of organic compounds is always ___________.
(iii) More than 90% of the known organic compounds are __________.
(iv) Vital force theory was discarded by the synthesis of ___________ in laboratory.

Q.

Define the Term hydrocarbons.

Q. Which chemist put forward the Vital Force Theory?

1. Friedrich Wohlev
2. J.J. Berzelius
3. Lavoiser
4. Haber

Q.

What do you understand by Vital Force theory

Q.

State the term :

The substance that can remove hydrogen and oxygen atoms in the ratio of 2: 1 (in the form of water) from the compounds.

Q.

Who gave a blow to vital force theory.

Q. Fill in the blanks.
Alkane which has eight carbon atoms has _______ number of hydrogen atoms.
[1 Mark]

Q. The heteroatom present in a molecule of $CHC{l}_3$ is

1. Carbon
2. Chlorine
3. Oxygen
4. Hydrogen

Q. (a) Give one use each of four different compounds of ammonia.
(b) Describe two tests to identify ammonia and ammonium ions in an aqueous solution.

Q. According to vital force theory the organic compound can only be obtained from:

1. living organisms
2. dead organisms
3. both living and dead organisms
4. none of the above

Q. Name the scientist who disproved the 'vital force theory' for the formation of organic compounds.

Q. Explain the following:
(i) The source of heat is removed after sometime after sometime in Haber's process.
(ii) ammonium nitrate is not used in the laboratory preparation of NH₃.
(iii) Ca(OH)₂ is preferred over NaOH in the preparation of ammonia.
(iv) Liquid NH₃ has no action on litmus, while liquor NH₃ has an effect.
(v) Dry N₂ and H₂ must be used in the Haber's process.
(vi) A promoter is added along the catalyst in the Haber's process.
(vii) Aqueous ammonia conducts electricity.
(viii) Ammonia cannot be collected over water.
(ix) Ammonia is present in sewage water.
(x) Ammonia solution is used in the laboratory to identify metal ions.

Q.

Define the Term hydrocarbons.

Q.

What are hydrocarbons?

Q.

Which element is the foundation of organic chemistry, as it occurs in all living organisms?

1. Carbon

2. Hydrogen

3. Nitrogen

4. Oxygen

Q. What theory did Wohler's Synthesis of Urea dispel?

1. Vital force
2. Isomerization
3. Limited elements
4. Salt rearrangements

Q. Which among the following is not a heteroatom?

1. O
2. H
3. N
4. S

Q. A hydrocarbon has molecular formula $C_4{H}_6$. Which of the class of hydrocarbons cannot have this formula?

1. A bicycloalkane
2. A cycloalkene
3. A diene
4. A bicycloalkene

Q.

Which element is the foundation of organic chemistry, as it occurs in all living organisms?

1. Hydrogen

2. Carbon

3. Nitrogen

4. Oxygen

Q. Vital theory was failed because a number of organic compounds can be made by inorganic compounds

1. True
2. False