Chemistry Aptitude Quiz
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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 2: Pentane is a straight-chain alkane, while 2-methyl pentane is a branched-chain alkane
Solution
(b)
Both (A) and (R) are correct but (R) is not the correct explanation for (A)
(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 2: If halogens are present in organic compound, it react with sodium to form sodium halides which dissolves in water
Solution
(d)
Na+⏟(C+N)→NaCN
2Na+S→Na_2 S
Na+Cl→NaCl
Na+Br→NaBr
Na+I→NaI
(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 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%
Solution
(b)
Percentage of sulphur
=32/233×0.35/0.36×100=13.35 %
(b)
Percentage of sulphur
=32/233×0.35/0.36×100=13.35 %
Q4. 
Solution
(d)
Stability of carbanion is decreased by +I effect or by e ̅'-donating groups and vice versa
(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 2: Tautomerism was introduced by C.P. Laar to explain the chemical reactivity of a substance according to two possible structures er
Solution
(b)
Both (A) and (R) are true, but (R ) is not the correct explanation for (A)
(b)
Both (A) and (R) are true, but (R ) is not the correct explanation for (A)
Q6. 
Solution
Part A
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 2: The carbon atom carrying negative charge has an octet of electrons
Solution
(a)
Molality does not depend upon volume of the solution as molarity or normality. So, it does not depend upon temperature.
(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 2: Sublimation process is very useful in separating a volatile solid from a non-volatile solid
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
(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 2: An outer jacket of copper, containing a liquid boiling at nearly 30℃ higher than the substance whose molecular mass is to be determined
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
(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. 
Solution
(c)
All of them are self-explanatory
(c)
All of them are self-explanatory
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