1. Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of ?

Oxidation reaction

Addition reaction

Displacement reaction

Substitution reaction

Answer: Addition reaction

Explanation:


2. Ethanol on oxidation gives ?

Methane

Ethanoic acid

Formalin

Ethane

Answer: Ethanoic acid

Explanation:


3. Artificial flavour for orange is obtained from ?

methyl butyrate

isoamyl valerate

octyl acetate

amyl acetate

Answer: octyl acetate

Explanation:


4. Which of the following contains covalent bond ?

HCl

Al2O3

CaF2

MgCl2

Answer: HCl

Explanation:


5. Which of the following statement is or are correct ?

An unsaturated hydrocarbon containing a triple bond is indicated by writing the word “yne” after the stem.

An unsaturated hydrocarbon containing a double bond is indicated by writing the word “ene” after the stem.

A saturated hydrocarbon containing single bonds is indicated by writing the word “ane” after the stem.

All the above.

Answer: All the above.

Explanation:

all the statements are correct.


6. Which of the following statements are usually correct for carbon compounds? these ?

are good conductors of electricity, do not have strong forces of attraction between their molecule.

are poor conductors of electricity, do not have strong forces of attraction between their molecules.

are poor conductors of electricity, have strong forces of attraction between their molecules.

are good conductors of electricity, have strong forces of attraction between their molecules.

Answer: are poor conductors of electricity, do not have strong forces of attraction between their molecules.

Explanation:

Carbon mainly forms covalent compounds, which due to the absence of free ions, are generally poor conductors of electricity. Also, the forces of attraction in between their molecules are weak. Note: Atomic number of carbon is 6. So, its electronic configuration is 2, 4. It can achieve the inert gas electron arrangement only by the sharing of electrons.


7. Which of the following statement is or are incorrect ?

The simplest alkene is ethene having the molecular formula C2H4.

The general formula of alkynes is CH2n +2 where n is the number of carbon atoms in one molecule of the alkyne.

An unsaturated hydrocarbon in which the two carbon atoms are connected by a double bond is called an alkene.

The unsaturated hydrocarbons are obtained mostly from petroleum by a process called cracking.

Answer: The general formula of alkynes is CH2n +2 where n is the number of carbon atoms in one molecule of the alkyne.

Explanation:

The general formula of alkynes is CnH2n – 2 where n is the number of carbon atoms in one molecule of the alkyne. You can easily understand by this example: Example, If an alkyne has 3 carbon atoms in its molecule, then n = 3, and its molecular formula will be C3H2×3–2 or C3H4.


8. Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g. hydrogen. After the formation of four bonds, carbon attains the electronic configuration of ?

krypton

neon

argon

helium

Answer: neon

Explanation:


9. The number of covalent bonds in C4H10 is ?

13

12

8

10

Answer: 13

Explanation:


10. Give the IUPAC name of CH3COOC2H5 ?

Etyl methyl carboxylic acid

Ethyl ethanoate

Ethyl ethanoic acid

Butanoate

Answer: Ethyl ethanoate

Explanation: