Category «Chemistry»

ORGANIC COMPOUNDS CONTAINING NITROGEN MCQs- 2

1) Formic acid when heated with H2SO4 gives a) b) c) d) CO 2) Which reaction is suitable for the preparation of -chloroacetic acid? a) Hell-Volhard Zelinsky reaction b) Nef reaction c) d) Perkin condensation 3) When 2-hydroxybenzoic acid is distilled with zinc dust, it gives a) Phenol b) Benzoic acid c) Benzaldehyde d) A …

ORGANIC COMPOUNDS CONTAINING HALOGENS – 1

1) Which among the following is used as an anaesthetic? a) 1-bromo-1-chloro-2,2,2-tri fluoro ethane b) 1,1,1-tri iodomethane c) dichloro – di fluoro methane d) lindane 2) A chemical used as a fumigant in food storage godowns a) 1,2-dichloro ethane b) 1,2-dibromo ethane c) octadecanoic acid d) methyl ethyl ketone 3) An unknown compound A has …

ORGANIC COMPOUNDS CONTAINING HALOGENS – 2

1) Haloforms are trihalogen derivatives of a) Methane b) Ethane c) Propane d) Benzene. 2) The haloform reaction is used for preparing a) Halogens b) c) d) 3) Which of the following processes does not occur during the formation of CHCI3 from C2H5OH and CaOCl2 ? a) Hydrolysis b) Oxidation c) Reduction d) Chlorination 4) …

ORGANIC COMPOUNDS CONTAINING HALOGENS – 3

1) A suitable reagent for converting a primary alcohol into the corresponding alkyl chloride is a) HCI b) HOCI c) d) 2) The reaction of ethylmagnesium iodide with acetaldehyde, after acidification, gives a) 2-Butanol b) 1-Butanol c) 2-Methyl-2-propanol d) 2-Methylpropanol. 3) What is Y in the reaction ? a) 1-Butanol b) 2-Butanol c) 2-Methyl-2-propanol d) …

HYDROGEN MCQs – 3

1) Hydrogen combines with other elements by a) Losing an electron b) Gaining an electron c) Sharing an electron d) All are correct 2) The decomposition of hydrogen peroxide 2H2O2 ® 2H2O + O2 is a a) Zero order reaction b) First order reaction c) Second order reaction d) Third order reaction 3) Hydrogen will …

HYDROGEN MCQs – 2

1) Which one of the following metals will not reduce H2O ? a) Ca b) Fe c) Cu d) Li 2) Which one of the following is reduced by H2O2 in acid solution ? a) b) KI c) d) 3) D2O is used more in a) the chemical industry b) Nuclear reactors c) Pharmaceutical preparations …

HYDROGEN MCQs – Part1

1) The maximum number of hydrogen bonds that are formed by a molecule of H2O is a) 1 b) 2 c) 3 d) 4 2) Which of the following elements can form interstitial hydrides? a) Pt b) Pd c) Ni d) all these metals 3) The ratio by mass of deuterium and oxygen in heavy …

States of Matter – VI

1) The IUPAC name of HO – CH2CH2-O – CH2CH2 – OH is a) b) Bis (2-hydroxyethyl)ether c) 3-Oxapentane-1,5-diol d) Diethylene glycol 2) The IUPAC name of the compound is a) Bicyclo[2,1,0]pentane b) 1,2-Cyclopropylcyclobutane c) 1,2-Cyclobutylcyclopropane d) 1, 2-Methylenecyclobutane 3) The conversion of 2, 3-dibromobutane to 2- butene with Zn and alcohol is a a) …

Acids and Bases

See the differences between acids and bases, and find out why they act the way they do. It is widely known that lemons taste sour due to their acid content, soil needs the optimum pH level for plants to grow properly and acid rain can wipe out entire ecosystems. But what really makes one thing …