Chemistry Model Questions – Bits for EAMCET, NEET and JEE Main

1. Hydro Carbon(s) that can damage DNA to cause cancer is/ are
1) 1, 2-Benzanthracene 2) 1, 2-Benzpyrene 3) 1, 2, 5, 6 – di Benzanthracene 4) All of these

2. Compound containing N gives prussian blue precipitate in Lassaigne’s test. Effective atomic number of the central atom in this
precipitate is
1) 36 2) 35 3) 34 4) 33

3. The stability of tertiary butyl carbonium ion can be explained by
1) Inductive effect 2) Hyper conjugation 3) Mesomeric effect 4) Both 1 and 2

4. Reimer- Tiemann reaction is an example of
1) Nucleophilic substitution 2) α-elimination
3) Nucleophilic addition 4) Rearrangement reaction

5. Total number of π electrons in volved in Diels Alder reaction during the formation of cyclo alkanes
1) 4 2) 8 3) 10 4) 6

6. According to IUPAC and Cahn-Ingold – Prelog system, absolute configuration at stereogenic centres present in D(+) glucose
is
1) 2R, 3R, 4S, 5R 2) 2R, 3S, 4R, 5R 3) 2R, 3R, 4R, 5S 4) 2S, 3R, 4S, 5S

7. The law of mass action was stated by
1) Lechatlier and Arrheneus 2) Boltzmann and Maxwell
3) Guldberg & Waage and 4) Van’t Hoff and Ostwald

8. A system is given off 90 Joules of heat and the work done by the system is 10J. The change in internal energy of the system in Joules is
1) –80 2) –100 3) +80 4) +100

9. 100 ml of HCl of pH = 1 is mixed with 100 ml of distilled water. The pH of the resultant solution is
1) 0 2) 1 3) 1.3 4) 2

10. Saturated solution of a salt contains
1) one dynamic equilibrium 2) two dynamic equilibria
3) many dynamic equilibria 4) no dynamic equilibrium

11. Steam distillation is based on
1) Avogadro’s law 2) Charle’s law 3) Boyle’s law 4) Dalton’s law of partial pressures

12. 9. Right statement (s) among the following is / are
a) Formation of oxides of N is an example of Law of multiple proportions
b) Now a days the amu has been replaced by unified mass.
c) The usage of the term equivalent weight is a misnomer
d) The oxidation number of any atom in uncombined state is not zero

13. Permutit is an example of
1) Chain Silicate 2) Sheet Silicate 3) Pyro Silicate 4) Ortho Silicate