CBSE Questions for Class 10 Chemistry Carbon And Its Compounds Quiz 3 - MCQExams.com

Unsaturated hydrocarbons undergo:
  • a substitution reaction
  • an oxidation reaction
  • an addition reaction
  • none of the above
The general formula for alkane is :
  • $$C_nH_{2n}$$
  • $$C_nH_{2n-2}$$
  • $$C_nH_{2n+2}$$
  • $$C_nH_{2n+1}$$
State whether the statement is true or false:
A homologous series is a family of hydrocarbons with different chemical properties that share the same general formula.
  • True
  • False
In the presence of concentrated sulphuric acid $$(H_2SO_4)$$, acetic acid reacts with ethyl alcohol to produce :
  • aldehyde
  • alcohol
  • ester
  • carboxylic acid
Give the IUPAC name for $$H_3C\! -\! CH_2\! -\! CH_2\! -\! OH$$.
  • Propanal
  • Propanol
  • Propionic acid
  • Propane
Oils on treatments with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of :
  • addition reaction
  • substitution reaction
  • displacement reaction
  • oxidation reaction
Draw the electron dot structure for oxygen molecule.
Carbon is used as abrasive as well as a __________.
  • drying agent
  • lubricant
  • explosive
  • none of these
 When ethanol react with sodium,which gas will produce?
  • hydrogen
  • oxygen
  • sodium ethoxide
  • carbon dioxide
Which of the following is not a saturated hydrocarbon?
  • Cyclohexane
  • Benzene
  • Butane
  • Pentane
State True or False:

Statement : The polar end in soap is called hydrophilic end.
  • True
  • False
Carbon forms four covalent bonds by sharing its four valence electrons with univalent atoms, e.g., hydrogen. After the formation of four bonds, carbon attains the electronic configuration of :
  • helium
  • neon
  • argon
  • krypton
In the soap micelles
  • The ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster
  • The ionic end of soap is on the interior of the cluster the carbon chain is out of the cluster.
  • Both ionic end and carbon chain are in the interior of the cluster
  • Both ionic end and carbon chain are on the exterior of the cluster
Catenation is defined as:
  • formation of double bond between carbon atoms.
  • linking of carbon atoms with of atoms other elements.
  • linking of carbon atoms with other carbon atoms to form a long chain
  • the formation of four covalent bonds by a carbon atom.
Which of the following compounds will fall in the same homologous series of formic acid $$(H-COOH)$$? 
  • $$CH_3COOH$$
  • $$CH_3COCH_3$$
  • $$CH_3CHO$$
  • None of the above
What change will you observe if you test soap with litmus paper (red and blue)?
  • It will turn red litmus blue
  • It will turn blue to red
  • Red litmus paper won't change colour
  • None of these
What are the two properties of carbon which led to the huge number of carbon compounds we see around us?
  • (i) Catenation (ii) Tetravalency
  • (i) Catenation (ii) Trivalency
  • (i) Catenation (ii) Pentavalency
  • (i) Covalency (ii) Divalency
Test that can be used to differentiate between butter and cooking oil is :
  • Hydrogenation reaction
  • Substitution reaction
  • Oxidation reaction
  • Double displacement reactions

Which out of the following has smell similar to that of vinegar?
  • Methanol
  • Ethanol
  • Ethanoic acid
  • Formic acid

The soap molecule has a
  • hydrophobic head and a hydrophilic tail
  • hydrophobic head and a hydrophobic tail
  • hydrophilic head and a hydrophobic tail
  • hydrophilic head and a hydrophilic tail

Vinegar is a:
  • 5-8% solution of acetic acid in water
  • 25-30% solution of acetic acid in water
  • 40-45% solution of acetic acid in water
  • 45-50% solution of acetic acid in water

$$ N{ a }_{ 2 }C{ O }_{ 3 }+2C{ H }_{ 3 }COOH\longrightarrow $$ 

Which gas is produced in this reaction?
  • $${ H }_{ 2 }O $$
  • $$CO_2$$
  • $$CO$$
  • $$H_2$$
Graphite is used as a lubricant in machines because it has a very high melting point and also it :
  • is crystalline
  • has layer structure
  • is a giant molecule
  • is a liquid at room temperature

Pentane has the molecular formula $$ C_{5}H_{12} $$. It has:
  • 10 covalent bonds    
  • 12 covalent bonds
  • 16 covalent bonds
  • 17 covalent bonds

$$ NaHC{ O }_{ 3 }+C{ H }_{ 3 }COOH\longrightarrow C{ H }_{ 3 }COONa+C{ O }_{ 2 }+{ H }_{ 2 }O $$,

This reaction is used as a test of carboxylic acid because :
  • gas is confirmed when it turns lime water black
  • gas is confirmed when it turns lime water milky
  • gas is confirmed when it turns lime water light green
  • gas is confirmed when it turns lime water brown
Which of the following is not a use of graphite ?
  • Lubricant
  • Electrodes
  • Black paints
  • High precision thermometers
_______ is a versatile solvent and is easily miscible with water.
  • Water
  • Ethanol
  • Petrol
  • Ether
In diamond, the bonding between carbon atoms is :
  • co-ordinate
  • ionic
  • hydrogen
  • covalent
The first fullerene was discovered in :
  • $$1970$$
  • $$1967$$
  • $$1997$$
  • $$1985$$
Density of graphite is :
  • $$0.5\ g/cm^3$$
  • $$2.266\ g/cm^3$$
  • $$1.08\ g/cm^3$$
  • none of the above
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