NEET 2019 | NEET Year Wise Previous Years Questions

Biology

Chemistry

1. For a cell involving one electron $$E_{cell}^\Theta $$ = 0.59 V at 298 K, the equilibrium constant for the cell reaction 2. If the rate constant for a first order reaction is k, the time (t) required for the completion of 99 % of the reaction i 3. The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber’s process is : 4. The structure of intermediate A in the following reaction, is : 5. For the second period elements the correct increasing order of first ionization enthalpy is : 6. In which case change in entropy is negative? 7. Conjugate base for Bronsted acids H2O and HF are : 8. Which is the correct thermal stability order for H2E (E = O, S, Se, Te and Po)? 9. For the cell reaction 2Fe3+(aq) + 2I– (aq) $$ \to $$ 2Fe2+(aq) + I2(aq) $${E_{cell}^\Theta }$$ = 0.24 V at 298 K. The st 10. 4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is : 11. Which of the following diatomic molecular species has only $$\pi $$ bonds according to Molecular Orbital Theory? 12. The compound that is most difficult to protonate is : 13. The number of sigma ($$\sigma $$) and pi ($$\pi $$) bonds in pent-2-en-4-yne is - 14. For an ideal solution, the correct option is : 15. Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region? 16. The mixture that forms maximum boiling azeotrope is : 17. Which will make basic buffer? 18. Match the following : .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-style:solid;border-width:0px;font 19. Match the Xenon compounds in Column-I with its structure in Column-II and assign the correct code : 20. Which of the following species is not stable? 21. For the chemical reaction N2(g) + 3H2(g) ⇌ 2NH3(g) the correct option is : 22. The non-essential amino acid among the following is : 23. Which of the following is incorrect statement? 24. An alkene “A” on reaction with O3 and Zn + H2O gives propanone and ethanal in equimolar ratio. Addition of HCl to alkene 25. The correct order of the basic strength of methyl substituted amines in aqueous solution is : 26. The major product of the following reaction is : 27. Among the following, the reaction that proceeds through an electrophilic substitution, is : 28. Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant external pressure of 2 bar. T 29. Which of the following reactions are disproportionation reaction? (a) 2Cu+ $$ \to $$ Cu2+ + Cu0 (b) 3MnO42- + 4H+ $$ \t 30. The correct structure of tribromooctaoxide is : 31. Identify the incorrect statement related to PCl5 from the following : 32. The manganate and permanganate ions are tetrahedral due to : 33. What is the correct electronic configuration of the central atom in K4[Fe(CN)6] based on crystal field theory? 34. pH of a saturated solution of Ca(OH)2 is 9. The solubility product (Ksp) of Ca(OH)2 is : 35. The most suitable reagent for the following conversion, is :

Physics

NEET 2019

MCQ (Single Correct Answer)

-1

A soap bubble, having radius of 1 mm, is blown from a detergent solution having a surface tension of 2.5 $$ \times $$ 10^–2 N/m. The pressure inside the bubble equals at a point Z₀ below the free surface of water in a container. Taking g = 10 m/s², density of water = 10³ kg/m³, the value of Z₀ is :

1 cm

10 cm

100 cm

0.5 cm

NEET 2019

MCQ (Single Correct Answer)

-1

A small hole of area of cross-section 2 mm² present near the bottom of a fully filled open tank of height 2 m. Taking g = 10 m/s², the rate of flow of water through the open hole would be nearly :

8.9 × 10^–6 m³/s

2.23 × 10^–6 m³/s

6.4 × 10^–6 m³/s

12.6 × 10^–6 m³/s

NEET 2019

MCQ (Single Correct Answer)

-1

Two parallel infinite line charges with linear charge densities +$$\lambda $$ C/m and -$$\lambda $$ C/m are placed at a distance of 2R in free space. What is the electric field mid-way between the two line charges?

$${{2\lambda } \over {\pi {\varepsilon _0}R}}$$ N/C

zero

$${\lambda \over {\pi {\varepsilon _0}R}}$$ N/C

$${\lambda \over {2\pi {\varepsilon _0}R}}$$ N/C

NEET 2019

MCQ (Single Correct Answer)

-1

A body weight 200 N on the surface of earth. How much will it weight half way down to the centre of the earth?

200 N

250 N

100 N

150 N

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