Problem 1
Natural gas is composed primarily of: (a) Methane (b) \(\mathrm{n}\) -butane (c) n-octane (d) A mixture of alkanes
Problem 1
Which among these gives the measure of organic pollution in water? (a) \(\mathrm{COD}\) (b) DO (c) \(\mathrm{pH}\) (d) Salinity
Problem 2
Alkanes mainly undergo reactions having: (a) Free radical reaction (b) Ionic elimination (c) Electrophillic addition (d) Heat/photochemical substitution
Problem 3
Which of the following is a contaminant? (a) \(\mathrm{CO}\) (b) \(\mathrm{CO}_{2}\) (c) \(\mathrm{SO}_{2}\) (d) Leakage of MIC
Problem 3
Carbon black, which is used in making printer's ink is obtained by the decomposition of: (a) Acetylene (b) Benzene (c) Carbon tetrahedral (d) Methane
Problem 4
Addition of \(\mathrm{HCN}\) to ethyne in the presence of \(\mathrm{Ba}(\mathrm{CN})_{2}\) as a catalyst gives: (a) Vinyl cyanide (b) Ethyl cyanide (c) 1,1 -dicyanoethane (d) Divinyl cyanide
Problem 4
Which statement is correct about biodegradable materials? (a) These are toxic in nature (b) These can be broken down by bacteria (c) These are used for converting waste to greenery (d) These spoil the biological environment
Problem 5
The reagent used for the following conversion: \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH} \longrightarrow \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{3}\) is (a) \(\mathrm{LiAlH}_{4}\) (b) Amalgamated zinc and concerntrated \(\mathrm{HCl}\) (c) Red phosphorus and concentrated HI (d) Soda lime
Problem 5
Fluoride in water is removed using precipitation method by: (a) Lime and alum (b) Lime, alum and bleaching powder (c) Activated carbon (d) Defluoron
Problem 6
DDT is: (a) A non degradable pollutant (b) A fertilizer (c) An antibiotic (d) Dichloro difluoro titanium
