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Chemistry Aptitude Quiz

Dear Readers,

IIT JEE exam which consists of JEE Main and JEE Advanced is one of the most important entrance exams for engineering aspirants. The exam is held for candidates who are aspiring to pursue a career in the field of engineering and technical studies. Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything..

Q1.  Statement 1: Pentane and 2-methyl pentane are homolo-gues
Statement 2: Pentane is a straight-chain alkane, while 2-methyl pentane is a branched-chain alkane
  •  Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution

(b)
Both (A) and (R) are correct but (R) is not the correct explanation for (A)

Q2. Statement 1: Lessaigne's test is the for nitrogen only
Statement 2: If halogens are present in organic compound, it react with sodium to form sodium halides which dissolves in water
  •  Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution
(d)
Na+⏟(C+N)→NaCN
2Na+S→Na_2 S
Na+Cl→NaCl
Na+Br→NaBr
Na+I→NaI


Q3.   Statement 1: In Messenger's method, the colourless solution, the liquid is transferred to beaker and barium chloride added to estimate sulphuric acid as BaSO4 in the usual way
Statement 2: If an experiment 0.36 g of an organic compound gave 0.35 of BaSO4. the percentage of sulphur in the compound is 13.35%
  •  Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution
(b)
Percentage of sulphur
=32/233×0.35/0.36×100=13.35 %
Q4.  
  •  Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution
(d)
Stability of carbanion is decreased by +I effect or by e ̅'-donating groups and vice versa


Q5.Statement 1: Metamers can also be position or chain isomers
Statement 2: Tautomerism was introduced by C.P. Laar to explain the chemical reactivity of a substance according to two possible structures er
  •  Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution
 (b)
Both (A) and (R) are true, but (R ) is not the correct explanation for (A)


Q6. 
  •   Statement 1: Pent-1-ene and 2-methyl but-1-ene are position isomers
    Statement 2: Position isomers have the same molecular formula but differ in the position of functional group
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  • Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution
Part A

Q7.Statement 1: Carbanion like ammonia have pyramidal shape
Statement 2: The carbon atom carrying negative charge has an octet of electrons
  •   Statement 1: The molality of the solution does not change with change in temperature.
    Statement 2: The molality of the solution is expressed in units of moles per 1000 g of solvent.
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution
(a)
Molality does not depend upon volume of the solution as molarity or normality. So, it does not depend upon temperature.


Q8. Statement 1: Benzoic acid is purified by sublimation process
Statement 2: Sublimation process is very useful in separating a volatile solid from a non-volatile solid
  •  Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution
(a)
In sublimation, certain substances when heated, first directly convert from the solid to the vapour state without melting. The vapour when cooled, give back the solid substance


Q9.Statement 1: ‘A Victor Mayer tube’ of hard glass, having a side-tube, leading to the arrangement for collection of displaced air over water.
Statement 2: An outer jacket of copper, containing a liquid boiling at nearly 30℃ higher than the substance whose molecular mass is to be determined
  •  Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution
(b)
In Victor Mayer method, a known mass of the substance is converted into vapour by dropping in a hot tube. The vapour displaces its own volume of air which is collected over water and its volume measured at the observed temperature and pressure


Q10. 
  •        r      s      p      q
  •        p     q      r      s
  •       q      r      s      p
  •      s      p      q      r
Solution
(c)
All of them are self-explanatory

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BEST NEET COACHING CENTER | BEST IIT JEE COACHING INSTITUTE | BEST NEET, IIT JEE COACHING INSTITUTE: ORGANIC CHEMISTRY - SOME BASIC PRINCIPLES AND TECHNIQUES Quiz-23
ORGANIC CHEMISTRY - SOME BASIC PRINCIPLES AND TECHNIQUES Quiz-23
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