Chemistry Test 8 - Solid States, Solutions, Coordination Compounds, Alcohol Phenol And Ether, Polymers


30 Questions MCQ Test JEE Main Mock Test Series 2020 & Previous Year Papers | Chemistry Test 8 - Solid States, Solutions, Coordination Compounds, Alcohol Phenol And Ether, Polymers


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QUESTION: 1

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

Solution:
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

Solution:
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 ?

Solution:
QUESTION: 4
The osmotic pressure of glucose solution (400mm),on dilution, decreased to 100 mm. The extent of dilution is
Solution:
QUESTION: 5
At what temperature does an aqueous solution containing molecules of a noneelectrolyte substance in 250g of water freeze ?
Solution:
QUESTION: 6
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 mmHg
Solution:
The equation governing the change in the vapor pressure when you use a nonvolatile liquid or solid is just a special case of Raoult's Law, Ptot = PaXa + PbXb. Since the second component has a negligible vapor pressure (nonvolatile), Raoult's law reduces to

P = P0X
where P is the vapor pressure of the mixture, P0 is the vapor pressure of the pure solvent and X is the mole fraction of the solvent.
Mole fraction of solute = 0.2
so mole fraction of solvent = 0.8 
So
P-10 = 0.8(P)
So P= 10/0.2 = 50
 
In second case
50-20 = x.50
30/50= x
So mole fraction of solvent = 0.6
QUESTION: 7

Ethyl chloride is converted into diethyl ether by

Solution:
QUESTION: 8

A metal crystallizes with a face-centered cubic lattice. The edge of the unit cell is 408 pm. The diameter of the metal atom is

Solution:
For an FCC cubic lattice:
r=a√2/4
where,
r is the radius of atom
a is the edge length of unit cell   
r=408x1.414/4 
=144.228 pm
Therefore, diameter of metal atom = 2 x 144.228 pm = 288.456 pm
QUESTION: 9
Alkene R–CH–CH = reacts with in the presence of  to give
Solution:
QUESTION: 10
The order of reactivity of the following alcohols towards conc. HCl is
i.                     ii.

 iii.                     iv.
Solution:
QUESTION: 11
Alcohol can be obtained by all methods except
Solution:
Bcz water
 or alcohols would protonate and thus 
destroy the Grignard reagent
, because the 
Grignard
 carbon is highly nucleophilic.

QUESTION: 12
Increasing order of acid strength among tertiary butanol,isopropanol and ehanol is
Solution:
QUESTION: 13
Chlorobenzene on fusing with solid NaOH gives
Solution:
QUESTION: 14
For the reaction the order of reactivity is
Solution:
QUESTION: 15
Benzyl alcohol on reaction with gives
Solution:
QUESTION: 16

In the reaction   the product (A) has the structure

Solution:
QUESTION: 17
Propene is allowed to react with HI. The product (A) is then treated with
to give a new product (B)

The final product (B) is
Solution:
QUESTION: 18
The reaction
  is an example of
Solution:
QUESTION: 19
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
Solution:
QUESTION: 20
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
Solution:
QUESTION: 21
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
Solution:
QUESTION: 22
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 copolymer of vinyl chloride and vinyl acetate is known as
Solution:
QUESTION: 23
Schottky defect in crystals is observed when
Solution:
QUESTION: 24

The number of atoms in 100 g of an f.c.c. crystal,with density 10 g/cc and cell edge equal to 100 pm, is equal to

Solution:
QUESTION: 25
In the NaCl crystal, the coordination number of each ion is 6. How can the CN change to 8?
Solution: Concept: Factor affecting co-ordination number. Nacl Crystal structure have 6:6 coordination number. On applying pressure , ion come closer to each other which result in more compact structure or close pack . Thus, increase in pressure changes the coordination number of NaCl crystal from 6:6 to 8:8 which is CsCl type crystal structure. Hence, correct answer is (c).
QUESTION: 26
In an f.c.c. unit cell, atoms are numbered as shown below. The atoms not touching each other are
Solution:
Explanation:
(B) Atoms along one edge or at corners do not touch each other in fee cell.

QUESTION: 27
In which of the following transition elements are the d orbitals not completely filled ?
Solution:
QUESTION: 28
reacts with as
The change in oxidation number of Cr is
Solution:
QUESTION: 29
Wilkinson’s catalyst consists of
Solution:
QUESTION: 30
Which of the following types of octahedral complexes will exhibit geometrical isomerism (where M= metal,a, b = achiral ligands) ?
Solution: