All living things are made of carbon. The amount of carbon in the earth’s crust and atmosphere is quite small. The earth’s crust contains only 0.02 percent carbon in the form of minerals (such as carbonates, hydrogen carbonates, coal, and petroleum), while the atmosphere contains 0.03 percent carbon dioxide. Despite the fact that there is only a small amount of carbon in nature, the importance of carbon appears to be enormous.
Download Class 10 Chemistry Worksheet on Chapter 4 Carbon and Its compounds Set 1 PDF
CBSE Class 10 Chemistry Chapter 4 Carbon and its Compounds – Set 1
Q-1: Which of the following statements is incorrect about carbon?
a) It has four electrons in the valence shell.
b) The four valencies of carbon do not lie in plane
c) The angle between any two adjacent valencies is 109o-28’.
d) Three valencies of carbon are inclined to one another at an angle of 120o while the fourth is perpendicular to the plane containing the remaining three valencies.
Q-2:The soap molecule has two parts:
a) a hydrophilic head and a hydrophobic tail
b) a hydrophobic head and a hydrophilic tail.
c) hydrophobic tail and hydrophobic head
d) a hydrophilic head and tail
Q-3: Octane has the molecular formula of C8H18, It has
a) 26 covalent bonds
b) 25 covalent bonds
c) 18 covalent bonds
d) 7 covalent bonds
Q-4: Match the reactions in Column I with their names in Column II.
| Column I | Column II |
|---|---|
A) |
i) Addition Reaction |
| B) CH2=CH2 +3O2 → 2CO2 + 2H2O | ii) Substitution Reaction |
C) |
iii) Oxidation Reaction |
| D) CH2=CH2 +Br2 +CCl4 → BrCH2-CH2Br | iv) Combustion Reaction |
Q-5:
a) Write the structures of butane and neopentane. How are they related to one another?
b) Why should sodium metal and ethanol both be dry when they are supposed to react?
Q-6: Catenation refers to an atom’s ability to form bonds with other atoms of the same element. Carbon and silicon both exhibit it. Compare the ability of the two elements to catenate. Give your reasoning.
Q-7: Write the names of the following compounds?
Q-8: What is the function of the metals or reagents indicated on arrows in the given chemical reactions?
Q-9: Fill in the blanks
a) The lowest molecular mass alkane which shows chain isomerism is________.
b) Urea is an _____ compound but it is _____ in water.
c) Vinegar is _________ solution of ethanoic acid.
d) Soaps react with hard water to produce _________ called the insoluble soap.
e) Saponification is the reverse of __________.
Q-10: What is the valency of carbon in CH4,CH3-CH=CH2, CH≡ CH?
Q-11: a)Which part of an organic compound has the greatest influence on its physical and chemical properties?
b) Carbon dioxide gas is produced when sodium bicarbonate reacts with ethanoic acid. Is this carbon dioxide produced by ethanoic acid or sodium bicarbonate? Explain.
Q-12:What is meant by denatured alcohol? What is the need to denature alcohol?
Q-13: Which of the following produces the most lather when using soap solution?
a) Underground water
b) Rain water
c) Distilled water containing calcium sulphate
d) All produce the same amount of lather
Statement linked to answer questions 14-17
Carbon is a highly adaptable element. It exists in three major allotropic forms: diamond, graphite, and Buckminsterfullerene, each with distinct physical properties. Diamond is hard, graphite is soft, and fullerene is neither extremely hard nor extremely soft.
Q-14: Which of the following diamond characteristics is correct?
a) It has a three dimensional structure
b) Its thermal conductivity is lower than that of copper
c) It is a good conductor of electricity
d) It contains both sp2 and sp3 hybridised carbon
Q-15: Which of the following statements about graphite is incorrect?
a) It has a two-dimensional layered structure composed of fused benzene rings
b) It only has carbon-carbon double bonds
c) It is a good conductor of heat and electricity
d) It is used as a solid lubricant for heavy machinery.
Q-16: Select the incorrect statement regarding carbon allotropes.
a) Lead in lead pencils is made of graphite
b) Fullerenes are soluble in organic solvents
c) Diamond weight is expressed in carats
d) The complete oxidation products of diamond, graphite, and fullerenes differ.
Q-17: Which of the following is not a fullerene property?
a) Of all the fullerenes, C60 allotrope is the most stable.
b) Its shape is similar to that of a soccer ball
c) It contains only fused six membered carbon rings
d) Its hardness is lower than that of diamond
Q-18: When an organic compound A is heated with concentrated H2SO4, it forms compound B, which forms compound C when one mole of hydrogen is added in the presence of Ni. When one mole of compound C is burned, it produces two moles of CO2 and three moles of H2O. Write the chemical equations for the reactions involving compounds A, B, and C.
Q-19: List the conclusions you reached while researching the following acetic acid properties.
a) Odour
b) Solubility in water
c) Effect of litmus paper
Q-20: The molecular formula of two compounds, X and Y, is C5H10. Compounds X and Y are saturated and unsaturated, respectively. Create a structure for them. What kind of reactions are compounds X and Y likely to undergo?
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Read Also:
- Carbon and its Compounds
- Carbon Compounds
- Carbon and its Compounds Questions
- Carbon(C)
- Class 10 Carbon and Its compounds MCQ
- Class 10 Carbon and its Compounds Important Questions with Answers
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