Question with Answer Olmpiad NSO

1.   Ethene is produced when :
(a) Ethanol reacts with ethanoic acid in presence of few drops of conc. H2SO4
(b) Ethanol is oxidized with acidified potassium dichromate
(c) Ethanol is heated with excess of conc. H2SO4 at 443 K
(d) Ethanol reacts with sodium metal                                                                                                                     
Ans (c)
2.   Rasika mixed sugarcane juice with yeast and kept in covered and sealed pot for a few days. After opening the pot she noticed that the juice started giving a strong smell. She filtered the juice and filled it in bottles. What is the name of the process and what is the product formed ?
(a) Fermentation, Ethyl alcohol                                                 
(b) Decomposition, Glucose
(c) Esterification, Fructose                                                          
(d) Fermentation, Acetic acid                    
Ans (a)
3.   The portion left after removing a hydrogen atom from an alkane is called :
(a) Functional group                                                                      
(b) Alkenyl group
(c) Alkyl group                                                                                  
(d) Phenyl group                                             
Ans (b)
4.   The compound which gives brisk effervescene with sodium metal but not with sodium hydrogen carbonate is :
(a) Ethanol                                                                                         
(b) Ethanoic acid
(c) Both (a) & (b)                                                                             
(d) None of these                                           
Ans (a)
5.   Mark the wrong statement among the following.
(a) People sleeping in closed room with coal fire burning inside have died due to CO2 poisoning.
(b) Flame is only produced when gaseous substances burn.
(c) Fullerenes are allotropes of carbon.
(d) Intake of methyl alcohol can cause death.                                                                                                    
Ans (a)
6.   Read the given statements and mark the correct option.
Statement 1 : Homologous series is a series of compounds having similar properties.
Statement 2 : The successive members of the homologous series differ by – CH2 group.
(a) Both statements 1 and 2 are true statement 2 is the correct explanation of statement 1.
(b) Both statements 1 and 2 are true but statement 2 is not correct explanation of statement 1
(c) Statement 1 is true but statement 2 is false
(d) Both statements 1 and 2 are false                                                                                                                    
Ans (b)
7.   Identify X and Y respectively.
(a) NO2, CO2                                                                                      
(b) CO, H2
(c) SO2, CO2                                                                                       
(d) CO2, H2                                                         
Ans (b)
8.   Identify the mixture Z.
(a) Producer gas                                                                              
(b) Water gas
(c) Coal gas                                                                                        
(d) Soda water                                                 
Ans (b)
9.   Read the given statements and mark the correct option.
Statement 1 : Coal and petroleum are called fossil fuels.
Statement 2 : Fossil fuels are non-renewable sources of energy.
(a) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
(b) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
(c) Statement 1 is true and statement 2 is false
(d) Both statements 1 and 2 are false                                                                                                                    
Ans (b)
10.   Which of the following general formulae represents the alkyl group ?
(a) CnH2n                                                                                              
(b) CnH2n+1
(c) CnH2n+2                                                                                           
(d) CnH2n-1                                                           
Ans (b)
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