NEET INTRODUCTORY TEST SERIES 4 CHEMISTRY

1. Which of the following is the most stable carbonium ion?

(a) C₆ H₅-CH₂
(b) CH₃-CH₂
(c) C₆ H₅-CH₂-CH₂
(d) C₆ CH₅-CH-C₆ H₅

2. The less reactivity of chlorine atom in CH₂=CH-CI is due to

(a) inductive effect                     
(b) resonance stabilisation
(c) electromeric effect                 
(d) electronegativity

3. Which of the following is an electrophile?

(a) BCI₃
(b) CH₃ OH
(c) NH₃
(d) AICI₄^–

4. The compound that does not give a blue colour in Lassaigne’s test is

(a) aniline
(b) glycine
(c) hydrazine
(d) urea

5. A mixture of acetone and methanol can be separated by

(a) vacuum distillation                
(b) steam distillation
(c) fractional distillation             
(d) none of these

6. The enolic form of a acetone contains

(a) 8 σ-bonds, 2 π-bonds and 1 lone pair
(b) 9 σ-bonds, 1 π-bonds and 2 lone pair
(c) 9 σ-bonds, 2 π-bonds and 1 lone pair
(d) 10 σ-bonds, 1 π-bonds and 1 lone pair

7. Common name of the compound C₆ H₅ CHO is

(a) anisole
(b) benzaldehyde
(c) salicylaldehyde
(d) none of these

8. Geometry of methyl free radical is

(a) pyramidal
(b) plana
(c) tetrahedral
(d) linear

9. The purification of naphthalene can be done by

(a) filtration
(b) sublimation
(c) crystallization
(d) evaporation

10. Two substances having slightly different solubility can be separated by

(a) distillation   
(b) fractional distillation
(c) crystallizatio
(d) fractional crystallization

11. Geometry of methyl free radical is

(a) pyramidal
(b) planar
(c) tetrahedral
(d) linear

12. The purification of naphthalene can be done by

(a) filtration
(b) sublimation
(c) crystallization
(d) evaporation

13. Two substances having slightly different solubility can be separated by

(a) distillation
(b) fractional distillation
(c) crystallization
(d) fractional crystallization

14. Aniline is usually purified by

(a) chromatography technique
(b) by addition of oxalic acid
(c) fractional crystallization
(d) steam distillation

15. The order of reactivity of alkyl halides in Wurtz reaction is

(a) 𝑅−𝐼>𝑅−𝐵𝑟>𝑅−𝐶𝐼
(b) 𝑅−𝐼<𝑅−𝐵𝑟<𝑅−𝐶𝐼
(c) 𝑅−𝐵𝑟>𝑅−𝐼=𝑅−𝐶𝐼
(d) 𝑅−𝐼>𝑅−𝐶𝐼>𝑅−𝐵𝑟

16. Which of the following is not an aromatic compound?

17. Benzene is obtained when phenol is distilled with

(a) copper turning
(b) aluminium dust
(c) zinc dust
(d) pumice stone

18. Identify the reagent from the following lish which can easily distinguish between 1-butyne and 2-butyne.

(a) Bromine, CCI₄          
(b) , Lindlar catalyst
(c) Dilute H₂ SO₄, HgSO₄
(d) Ammoniacal  solution

19. Which of the following species is aromatic?

(a) CH₃ CH₂ CH₂ COOH+O₂
(b) CH₃ CH₂ COOH
(c) CH₃ CH₂ COOH+CO₂
(d) CH₃ CH₂ COCH₃+HCOOH