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. The process of separation of racemic modifications into d and l enantiomers is called:
Solution
(a) The separation of a racemic mixture is called resolution
(a) The separation of a racemic mixture is called resolution
Q2.Give the decreasing order of hyperconjugative effect of R in R-CH=CH_2, where R is:
I.Me-II.Et-III.Me_2 CH-IV.Me_3 C-
Solution
Q3. Two litre air formed 1915 ml of ozonised air when passed through Brodio's apparatus. The volume of ozone formed is:
Solution
(b) 3 O2 ⇌ 2 O3 There is a reduction of 1 volume When reduction in volume is 1, volume of O3 is 2 Volume of air = 2000 ml Volume of ozonised air =1915 ml Reduction in volume =2000-1915=85 ml When reduction of 1 volume, volume ofO3 = 2 When reduction is 85 ml , volume of O3= 85×2 = 170 ml
(b) 3 O2 ⇌ 2 O3 There is a reduction of 1 volume When reduction in volume is 1, volume of O3 is 2 Volume of air = 2000 ml Volume of ozonised air =1915 ml Reduction in volume =2000-1915=85 ml When reduction of 1 volume, volume ofO3 = 2 When reduction is 85 ml , volume of O3= 85×2 = 170 ml
Q4. The decreasing order of –I effect of the orbitals is: I. spII.sp^2 III.sp^3
Solution
(a) The more the s character, the more is the penetration effect of s orbital towards the nucleus, and hence more e ̅'-withdrawing effect. So, sp(50%s)>sp^2 (33% s)>sp^3 (25% s)
(a) The more the s character, the more is the penetration effect of s orbital towards the nucleus, and hence more e ̅'-withdrawing effect. So, sp(50%s)>sp^2 (33% s)>sp^3 (25% s)
Q5.The minimum number of carbon atoms an alkane should contain in order to exihibit optical activity is:
Solution
Part C :7
Part C :7
Q6. An alkane (A) having a molecular mass of 72 produces one monochlorination product. Compound (A) is:
Solution
Q7.The pair of structures given below represents:
Solution
(b) The position of Cl group has changed. So they are position isomers
(b) The position of Cl group has changed. So they are position isomers
Q8.The decreasing order of reactivity of the following alkenes is:
i. 2, 3-Dimethyl-2-butene ii. 2-Methyl-2-butene
iii. 2-Butene iv. Ethene
Solution
Q9. The decreasing order of –I effect of the following is:
I. COOHII.FIII.ORIV.OHV.Ph-
Solution
Part: A
Part: A
Q10. 
Solution
Part: A
Part: A
