class 10 – Carbon and Its Compounds1 Class 10 -Carbon and Compounds- Chemistry Mock Test. This Test Consist of 20 QuestionsTotal Time - 20 -Minutes 1. The allotrope of carbon used in nuclear reactors is : 2. The following chemical reaction shows the addition of chlorine to methane in the presence of sunlight:CH4 + Cl4 → XWhat is likely to be the product of the reaction represented by “X”? CH3Cl + HCl CH3Cl + H2SO4 CHCl3 + HCl CH4+ H2SO4 None 3. Which of the following statements are usually correct for carbon compounds? These (i) are good conductors of electricity. (ii) are poor conductors of electricity. (iii) have strong forces of attraction between their molecules. (iv) do not have strong forces of attraction between their molecules. (i) and (iii) (i) and (iv) (ii) and (iii) (ii) and (iv) None 4. In which of the following substances, carbon atoms are arranged in a regular tetrahedral structure? Diamond Benzene Graphite Carbon black None 5. In diamond, each carbon atom is bonded to four other carbon atoms to form a structure in the shape of a football a structure of a ring a rigid three-dimensional structure a hexagonal array None 6. Which of the following is a crystalline allotrope of carbon? Coal Charcoal Lamp black Fullerene None 7. NaHCo3+CH3COOH⟶CH3COONa+CO2+H 2O,This reaction is used as a test of carboxylic acid because : 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 black gas is confirmed when it turns lime water brown None 8. Fullerene is an allotrope of carbon which is similar to a football. It has 60 carbon atoms joined together and no other element in it. There are various types of fullerenes. C60, C70, C74, and C75 are the members of the fullerene family. But C60 (pronounced as C sixty) is the most stable and most studied form of fullerenes. What do you think is the nature of the bond which is joining these atoms together? Hydrogen Iconic Coordinate Covalent None 9. Oils on treating with hydrogen in the presence of palladium or nickel catalyst forms fats. This is an example of substitution reaction displacement reaction addition reaction oxidation reaction None 10. Name the type of reaction when ethanol is warmed with ethanoic acid to form ethyl acetate in the presence of concentrated H2SO4. 11. Which of the following option explains the naming of ethane? The presence of a functional group connected with a single bond As it contains six hydrogen atoms, and a single bond connects the carbon and hydrogen atom As it contains two carbon atoms, and a single bond connects the carbon atoms Carbon compound with a total number of eight atoms is named ethane None 12. Choose the correct statement. All th eoptions In ethane, the two carbon atoms share one pair of electrons among themselves to form one carbon-carbon single covalent bond The ethene molecule is made up of 2 carbon atoms and 4 hydrogen atoms Each carbon atom shares three electrons with three hydrogen atoms to form three carbon-hydrogen single covalent bonds None 13. The following chemical reaction shows the addition of chlorine gas to hydrocarbon in the presence of sunlight.CHCl3 + Cl2 → CCl4 + HClHow does chlorine react to a hydrocarbon compound in the presence of sunlight? It adds hydrogen to the compound It substitutes hydrogen atom from the compound It breaks double and triple bonds into a single bond It adds an oxygen atom to the compound None 14. Which of the following statements are correct for carbon compounds?(i) Most carbon compounds are good conductors of electricity.(ii) Most carbon compounds are poor conductors of electricity.(iii) Force of attraction between molecules of carbon compounds is not very strong.(iv) Force of attraction between molecules of carbon compounds is very strong. (ii) and (iv) (ii) and (iii) (i) and (iv) (i) and (iii) None 15. The electronic configuration of an element is found to be 2, 4. How many bonds can one carbon atom form in a compound? 6 2 4 8 None 16. Covalent bonds are formed by the of electrons between two atoms so that both can achieve acompletely filled outermost shell. 17. The chemical reaction shows the addition of chlorine gas to hydrocarbon in the presence of sunlight.CHCl3 + Cl2 → CCl4 + HClHow does chlorine react to a hydrocarbon compound in the presence of sunlight? it breaks double and triple bonds into a single bond it substitutes hydrogen atom from the compound it adds an oxygen atom into the compound it adds hydrogen into the compound None 18. Which of the following will give a pleasant smell of ester when heated with ethanol and a small quantity of sulphuric acid? CH3OH CH3COOH CH3CHO CH3CH2OH None 19. While cooking ,if bottom of the vessel is getting blackened on the outside, it means that The food is not cooked properly The fuel is wet The fuel is burning completely The fuel is not burning properly None 20. Carbon is less reactive than O 2,Cl2 etc. because: none of the above it is black. the covalent bonds between various carbon atoms are very strong. it is a non-metal having low valency. None Time's upTime is Up! 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