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Chemistry: Topic-wise Test- 8 - NEET MCQ


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30 Questions MCQ Test - Chemistry: Topic-wise Test- 8

Chemistry: Topic-wise Test- 8 for NEET 2024 is part of NEET preparation. The Chemistry: Topic-wise Test- 8 questions and answers have been prepared according to the NEET exam syllabus.The Chemistry: Topic-wise Test- 8 MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Chemistry: Topic-wise Test- 8 below.
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Chemistry: Topic-wise Test- 8 - Question 1

The molal depression constant for water is 1.86. The depression constant for 100g is

Chemistry: Topic-wise Test- 8 - Question 2

Urea is added to 2 litre of water to such an extent that becomes equal to 1/100. The weight of urea added is

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Chemistry: Topic-wise Test- 8 - Question 3

The moleucular weight of NaCl (degree of dissociation= x) determined by the osmotic pressure method, is found to be different from its actual molecular wieght (M). Which of the following relationship is correct ?

Chemistry: Topic-wise Test- 8 - Question 4

Phenol associates in benzene to produce double moleucles. To what degree phenol assicates if van’t Hoff factor is 0.54 ?

Detailed Solution for Chemistry: Topic-wise Test- 8 - Question 4

To solve this problem, we can use the concept of the van't Hoff factor (iii) and the degree of association (α\alphaα).

The van't Hoff factor iii is related to the degree of association α\alphaα for a dimerization reaction (where two molecules associate to form a dimer) by the following formula:

 

Chemistry: Topic-wise Test- 8 - Question 5
Dry air is bubbled successively through (i) a solution,(ii) its solvant, and (iii) through The lowering of vapour pressure of the solvant due to the addition
of solute is equal to
Chemistry: Topic-wise Test- 8 - Question 6
At what temperature does an aqueous solution containing molecules of a noneelectrolyte substance in 250g of water freeze ?
Chemistry: Topic-wise Test- 8 - Question 7
The vapour pressure of a solvent decreased by 10mmHg when a nonvolatile solute was added to the solvent. The mole fraction of the solute in the solution
is 0.2. What would be the mole fraction of the solvent if the decrease in the vapour pressure is to be 20 mm Hg
Chemistry: Topic-wise Test- 8 - Question 8
Which of the following will not give iodoform test
Chemistry: Topic-wise Test- 8 - Question 9

Here Y is

Chemistry: Topic-wise Test- 8 - Question 10
forms an alcohol on reaction with
Chemistry: Topic-wise Test- 8 - Question 11
can be converted into by the following sequence of steps
Chemistry: Topic-wise Test- 8 - Question 12
Alkene reacts with in the presence of to give
Chemistry: Topic-wise Test- 8 - Question 13
Vapours of an alcohol were passed over red hot copper. It gave an olefin. The alcohol is
Chemistry: Topic-wise Test- 8 - Question 14
cannot be dried by andhydrous because
Chemistry: Topic-wise Test- 8 - Question 15

Alcohol can be obtained by all methods except

Detailed Solution for Chemistry: Topic-wise Test- 8 - Question 15

Answer :C

Solution :

C2H5MgBr + H2O = Mg(OH)Br + C2H6(Ethane)

Chemistry: Topic-wise Test- 8 - Question 16

Increasing order of acid strength among tertiarybutanol, isopropanol and ehanol is

Detailed Solution for Chemistry: Topic-wise Test- 8 - Question 16

Increase in R increases the e+ve of the element, so acidic strength decreases as R group increase in the compound. So acidic strength is in the order of Ethanol > Isopropanol > Tertiary Butanol

Hence B

Chemistry: Topic-wise Test- 8 - Question 17
How many isomeric alcohols are possible with formula
Chemistry: Topic-wise Test- 8 - Question 18

Iodoform gives a precipitate with on heating with but chloroform does not because

Chemistry: Topic-wise Test- 8 - Question 19
Chlorobenzene on fusing with solid NaOH gives
Chemistry: Topic-wise Test- 8 - Question 20
For the reaction the order of reactivity is
Chemistry: Topic-wise Test- 8 - Question 21
Benzyl alcohol on reaction with gives
Chemistry: Topic-wise Test- 8 - Question 22
Methyl bromide and Ethyl bromide is mixed with equal proportions and the mixture is treated with metallic sodium. Which of the following is not expected to form
Chemistry: Topic-wise Test- 8 - Question 23
Aryl halides are less reactive towards neucliophilic substitution reactions as compared to alkyl halides due to
Chemistry: Topic-wise Test- 8 - Question 24

Propene is allowed to react with HI. The product (A) is then treated with  to give a new product (B)

Chemistry: Topic-wise Test- 8 - Question 25
The reaction
  is an example of
Chemistry: Topic-wise Test- 8 - Question 26

Which of the following statements about phenol is correct?

Chemistry: Topic-wise Test- 8 - Question 27
The utility of the polymers in various fields is due to their mechanical properties like tensile strength , elasticity, toughness etc. These properties mainly depend upon intermolecular forces like van der Waal’s forces and hydrogen bonding operating in polymer molecules. Polymers have been classified on this basis,e.g.(1) Elastomers (2) Thermoplacstics (4)Thermosetting. Hence
Vulcanized rubber is an example of
Chemistry: Topic-wise Test- 8 - Question 28
The utility of the polymers in various fields is due to their mechanical properties like tensile strength , elasticity, toughness etc.These properties mainly depend upon intermolecular forces like van der Waal’s forces and hydrogen bonding operating in polymer molecules. Polymers have been classified on this
basis,e.g.(1) Elastomers (2) Thermoplacstics (4)Thermosetting. Hence
The molecular forces of attraction are weakest in
Chemistry: Topic-wise Test- 8 - Question 29
The utility of the polymers in various fields is due to their mechanical properties like tensile strength , elasticity, toughness etc.These properties mainly depend upon intermolecular forces like van der Waal’s forces and hydrogen bonding operating in polymer molecules. Polymers have been classified on this
basis,e.g.(1) Elastomers (2) Thermoplacstics (4)Thermosetting. Hence
Which of the following have usually a linear structure?
Chemistry: Topic-wise Test- 8 - Question 30
The utility of the polymers in various fields is due to their mechanical properties like tensile strength , elasticity, toughness etc.These properties mainly depend upon intermolecular forces like van der Waal’s forces and hydrogen bonding operating in polymer molecules. Polymers have been classified on this
basis,e.g.(1) Elastomers (2) Thermoplacstics (4)Thermosetting. Hence
Nylon-6 which is fibre is made from
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