class 10 – Carbon and Its Compounds1 Class 10 -Carbon and Compounds- Chemistry Mock Test. This Test Consist of 20 QuestionsTotal Time - 20 -Minutes 1. Carbon is less reactive than O 2,Cl2 etc. because: none of the above it is a non-metal having low valency. the covalent bonds between various carbon atoms are very strong. it is black. None 2. Which of the following is a crystalline allotrope of carbon? Charcoal Fullerene Coal Lamp black None 3. In diamond, each carbon atom is bonded to four other carbon atoms to form a hexagonal array a structure in the shape of a football a rigid three-dimensional structure a structure of a ring None 4. The allotrope of carbon used in nuclear reactors is : 5. 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 brown 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 None 6. Covalent bonds are formed by the of electrons between two atoms so that both can achieve acompletely filled outermost shell. 7. The electronic configuration of an element is found to be 2, 4. How many bonds can one carbon atom form in a compound? 2 8 4 6 None 8. Oils on treating with hydrogen in the presence of palladium or nickel catalyst forms fats. This is an example of displacement reaction addition reaction oxidation reaction substitution reaction None 9. 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 Coordinate Covalent Iconic None 10. 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 substitutes hydrogen atom from the compound it adds hydrogen into the compound it breaks double and triple bonds into a single bond it adds an oxygen atom into the compound None 11. 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 an oxygen atom to the compound It adds hydrogen to the compound It breaks double and triple bonds into a single bond It substitutes hydrogen atom from the compound None 12. Which of the following option explains the naming of ethane? As it contains two carbon atoms, and a single bond connects the carbon atoms As it contains six hydrogen atoms, and a single bond connects the carbon and hydrogen atom Carbon compound with a total number of eight atoms is named ethane The presence of a functional group connected with a single bond None 13. 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) (ii) and (iii) (ii) and (iv) (i) and (iv) None 14. Which of the following will give a pleasant smell of ester when heated with ethanol and a small quantity of sulphuric acid? CH3COOH CH3OH CH3CHO CH3CH2OH None 15. Choose the correct statement. 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 All th eoptions In ethane, the two carbon atoms share one pair of electrons among themselves to form one carbon-carbon single covalent bond None 16. 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 17. Name the type of reaction when ethanol is warmed with ethanoic acid to form ethyl acetate in the presence of concentrated H2SO4. 18. In which of the following substances, carbon atoms are arranged in a regular tetrahedral structure? Graphite Diamond Benzene Carbon black None 19. 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. (i) and (iv) (ii) and (iii) (ii) and (iv) (i) and (iii) None 20. 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 CHCl3 + HCl CH3Cl + H2SO4 CH4+ H2SO4 None Time's upTime is Up! 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