NEET Chemistry Chapter Wise Mock Test – Organic and Environmental Chemistry I
In the mechanism of Hofmann reaction, which intermediate rearranges to alkyl isocyanate?
cis and trans-2-butene are
(a) conformational isomers
(b) optical isomers
(c) geometrical isomers
(d) position isomers
Which one of the following conformations of cyclohexane is chiral?
(a) Twist boat
Which of the following methods is/are used for the purification of solid impurities?
(d) All of these
The fragnance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature, but are miscible with water vapour in vapour phase. A suitable method for the extraction of these oils from the flowers is
(c) distillation under reduced pressure
(d) steam distillation
Distillation is used to separate liquids which differ in their boiling points by
The major organic compound formed-by the reaction of 1,1,1-trichloroethane with silver powder is
Alkyl halide react with dialkyl,pepper reagents to give
(a) alkenyl halides
(c) alkyl copper halides
When a mixture of methane and oxygen is passed through heated molybdenum oxide, the main product formed is
(a) methanoic acid
The chemical added to leaded petrol to prevent the deposition of lead in the combustion chamber is
(c) ethylene dibromide
(d) All of these
Hydrolysis of ozonide of but-1-ene gives
(a) ethylene only
(b) acetaldehyde and formaldehyde
(c) propionaldehyde and formaldehyde
(d) acetaldehyde only
In its reaction with silver nitrate, acetylene shows
(a) oxidising property
(b) reducing property
(c) acidic property
(d) basic property
n-butylbenzene on oxidation will give
(a) benzoic acid
(c) 4-phenyl butanoic acid
(d) benzyl alcohol
Heating a mixture of sodium benzoate and soda lime gives
(c) sodium benzoate
(d) calcium benzoate
The most reactive among the following towards sulphonation is
Ozone layer is depleted due to
(b) oxides of nitrogen
(c) oxides of carbon
(d) Both (a) and (b)
Main sources of water and soil pollution is
(a) agro industry
(b) thermal power plant
(d) All of the above
Biochemical oxygen demand is a measure of organic material present in water. BOD value less than 5 ppm indicates a water sample to be
(a) rich in dissolved oxygen
(b) poor in dissolved oxygen
(c) higher polluted
(d) not suitable for aquatic life
Which of the following practices will not come under green chemistry?
(a) If possible, making use of soap made of vegetable oils instead of using synthetic detergents
(b) Using H2 02 for bleaching purpose instead of using chlorine based bleaching agents
(c) Using bicycle for travelling small distance instead of using petrol/diesel based vehicles
(d) Using plastic cans for neatly storing substances
Which one of the following is not an application of green chemistry?
(a) Replacement of CFCs by C02 as blowing agent in the manufacture of polystyrene foam sheets
(b) Reacting methylamine and phosgene to produce methyl isocyanate
(c) Replacement of organotins by ‘sea-nine’ as anti-fouling compound in sea marines
(d) Catalytic dehydrogenation of the diethanol amine without using cyanide and formaldehyde
Direction (Q .Nos. 36-37) In the following questions, more than one of the answers given may be correct. Select the correct answers and mark it according to the codes.
(a) 1, 2 and 3 are correct
(b) 1, and 2 areggffect
(c) 2 and 4 are correct
(d) 1 and 3 are correct
Direction (Q. Nos. 39-40) Each of these questions contains two statements : Assertion and Reason. Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below.
(a) Assertion is true, Reason is true; Reason is a correct explanation for Assertion
(b) Assertion is true, Reason is true; Reason is not a correct explanation for Assertion
(c) Assertion is true, Reason is false
(d) Assertion is false, Reason is false
Assertion Among isomeric pentanes, 2, 2-dimethyl propane has the highest boiling point.
Reason Branching does not affect the boiling point.
Assertion lodination of alkanes is reversible.
Reason lodination is carried out in the presence of iodic acid.