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Carbon and its Compounds

Description: carbon , compound of carbon
Number of Questions: 15
Created by:
Tags: Chemistry Ethanoic Acid Carbon and Its Compounds Soaps and Detergents Carbon- Bonding and Structural Properties Ethanol , Properties Alkenes Alkanes Ketones Science Sanitation and Diseases, Sanitation at Public Places
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X compound reacts with methyl alcohol in presence of acid to give Y compound. Y compound gives sweet-smelling and used in making perfumes and as flavouring agents. What is X and Y?

  1. X = CH3CH2OH, Y = CH3COOH

  2. X = CH3COOH, Y = CH3COCH3

  3. X = CH3OCH3, Y = CH3COOH

  4. X = CH3COOH, Y = CH3COOCH3

  5. X = CH3COOH, Y = CH3COOCH2CH3

Show answer
Correct Option: D
Explanation:

Action of carboxylic acids with alcohols in presence of acids to give ester, this reaction is known as esterification. Esters are sweet-smelling substances. These are used in making perfumes and as flavouring agents. Esters react in the presence of an acid or a base to give back the alcohol and carboxylic acid. CH3COOH + CH3OH □(→┴Acid ) CH3COOCH3.

Which of the following statements is true for soaps and detergents?

  1. Soaps and detergents have a small ionic part and a large non-polar hydrocarbon part.

  2. Soaps and detergents have a large ionic part and a small polar hydrocarbon part.

  3. Soaps and detergents have a small ionic part and a large polar hydrocarbon part.

  4. Soaps and detergents have a large ionic part and a small non-polar hydrocarbon part.

  5. None of these

Show answer
Correct Option: A
Explanation:

A soap molecule has two ends. One end is hydrophilic and the other end is hydrophobic.

Buckministerfullerene is an allotropic form of

  1. phosphorous

  2. oxygen

  3. carbon

  4. sulphur

  5. nitrogen

Show answer
Correct Option: C
Explanation:

Fullerenes form another class of carbon allotropes. The first one to be identified was C-60, which has carbon atoms arranged in the shape of a football. The molecule was named Buckministerfullerence after the US architect Buckminister Fuller who developed a dome like structure.

Which of the following is INCORRECT?

  1. Diamond is covalent network solid which is hardest substances.

  2. Graphite is soft and slippery, and can act as a lubricant.

  3. Carbon Black is amorphous allotropy of carbon.

  4. Carbon dioxide is a gas, which is used as fire extinguisher.

  5. Fullerenes form another class of carbon allotropes, C-50 was the first fullerene to be identical.

Show answer
Correct Option: E
Explanation:

Fullerenes form another class of carbon allotropes. The first one to be identified was C-60, which has carbon atoms arranged in the shape of a football. It contains 5 ring membered and six ring membered of carbon atoms.

Nitrogen molecule is formed by sharing of

  1. two electrons

  2. three electrons

  3. four electrons

  4. five electrons

  5. one electron

Show answer
Correct Option: B
Explanation:

Nitrogen has 5 electrons in the valency shell. To attain the configuration of noble gas, one nitrogen atom shares with three electrons with three electrons of the other nitrogen atom. Three paired of electrons constituent of triple bond.

Ethanol reacts with sodium to form which of the following two products?

  1. Sodium ethanoate and hydrogen gas

  2. Sodium ethoxide and hydrogen gas

  3. Sodium ethanoate and oxygen gas

  4. Sodium hydrogen carbonate and carbon dioxide gas

  5. Sodium ethoxide and oxygen gas

Show answer
Correct Option: B
Explanation:

Ethanoic acid reacts with a base, such as sodium hydroxide to give a salt (sodium ethanoate or commonly called sodium acetate) and water: 2Na + 2CH3CH2OH → 2CH3CH2ONa + H2

How many bonds are there in the Ethene molecules?

  1. 2 single bond, one double bond

  2. 4 single bond, one triple bond

  3. 4 single bond, one double bond

  4. 4 single bond only

  5. One double only

Show answer
Correct Option: C
Explanation:

The formula of ethene is CH2=CH2, between C and H is formed a single bond and C and C formed double bond. 4C-H = 4 x 1 = 4 and C-C = 1 double bond.

Which of following process is used to breakdown of a large droplet of oil into tiny droplets by soap or detergent?

  1. Dissolution

  2. Sedimentation

  3. Saponification

  4. Emulsification

  5. Condensation

Show answer
Correct Option: D
Explanation:

Breaking down of a large droplet of oil into tiny droplets by soap or detergent is called emulsification.

Ethylalcohol is treated with alkaline potassium permanganate to give a carboxylic acid. This conversion of reaction is example of

  1. combustion reaction

  2. addition reaction

  3. substitution reaction

  4. oxidation reaction

  5. hydrogenation

Show answer
Correct Option: D
Explanation:

Alkaline potassium permanganate or acidified potassium dichromate are oxidising alcohols to acids, i.e., adding oxygen to the starting material. Hence, they are known as oxidising agents.

Which of the following gas is evolved if sodium bicarbonate is added to a solution of tartaric acid?

  1. Hydrogen

  2. Nitrogen

  3. Carbon monoxide

  4. Sulphur dioxide

  5. Carbon dioxide

Show answer
Correct Option: E
Explanation:

Carboxylic acid (organic acid) reacts with NaHCO3/NaCO3 to evolve a CO2 gas. Tartaric acid (OH-CH-COOH )2  is a dicarboxylic acid. It reacts with NaHCO3 to give  CO2 gas and sodium tartrate.

Tartaric acid + sodium bicarbonate → sodium tartrate + carbon dioxide 

 

Butanone is a five carbon compound. It has which of the following functional group?

  1. Carboxylic

  2. Aldehyde

  3. Ketone

  4. Alcohol

  5. Amine

Show answer
Correct Option: C
Explanation:

CH3CH2COCH3 contains ketone group. IUPAC name of ketone group is alkane + one= alkanone.

Which of the following is the I.U.P.A.C name of CH3CH2CH=CH2?

  1. Butane

  2. Prop-1-ene

  3. But-2-ene

  4. Butyne

  5. But-1-ene

Show answer
Correct Option: E
Explanation:

Counting the number of carbon atoms i.e. 4 and it has one double bond at first position of carbon. CH3CH2CH=CH2. Buta + ene = but-1-ene

An organic compound X is an essential constituent of wine /beer and intoxication causes by drinks. Oxidation of X yields an organic compound Y, which is present in vinegar. What is X and Y?

  1. X = CH3CH2OH, Y = CH3COOH

  2. X = CH3OH, Y = CH3COOH

  3. X = CH4, Y = CH3OH

  4. X = CH3CHO, Y = CH3COOH

  5. X = CH3COOH, Y = CH3COOH

Show answer
Correct Option: A
Explanation:

Compound ( X) CH3CH2OH is ethanol,  which essential constituent of beer and wine. It causes intoxication. Oxidation of ethanol (CH3CH2OH) yields ethanoic acids. Vinegar is 5-8% solution of ethanoic acid (acetic acid) in water. CH3CH2OH □(→┴(Oxidation ) ) CH3COOH

The graphite shows all properties except which of the following?

  1. It is soft and greasy to touch.

  2. It has lustre in nature.

  3. It is hexagonal crystals and soluble in all ordinary solvents.

  4. It is a good conductor of electricity.

  5. Its relative density is 2.3.

Show answer
Correct Option: C
Explanation:

Characteristics of graphite are given follow: It is soft and greasy to touch. Its relative density is 2.3. It is black in color and opaque. Graphite is a good conductor of heat and electricity. It burns in air at 700-800°C to give CO2. It occurs as hexagonal crystals. It is insoluble in all ordinary solvents.

Which of following compound is highly melting point?

  1. CCl4

  2. MgCl2

  3. CH4

  4. N2

  5. CO2

Show answer
Correct Option: B
Explanation:

 MgCl2 is ionic compound and strong intermolecular force of attraction. As a result, ionic compounds have high melting and boiling points.

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