Friend As on your Asking Here I m Providing Previous year Sample Question Of Chemistry Subject of Manipal University , Have a Look :


1.Which of the following is diamagnetic?

(a) H2^+ (b) O2 (c) Li2

2. By heating phenol with chloroform in alkali,it is converted into

(a) salicylic acid (b) salicylaldehyde (c) anisole (d) phenyl benzoate

3. The formula mass of Mohr’s salt is 392. The iron present in it is oxidised by KMnO4 in acidic medium. The equivalent mass of Mohr’s salt is

(a) 392 (b) 31.6 (c) 278 (d) 156

4. solubility product of a salt AB is 1×10^-9 M^2 in a solution in which the concentration of A^+ ions is 10^-3 M. The salt will precipitate when the concentration of B^- ions is kept

(a) between 10^-8 M to 10^-7 M

(b) between 10^-7 M to 10^-8 M

(c) >10^-5 M

(d) <10^-8 M

5. The decomposition of a certain mass of CaCo3 gave 11.2 dm^3 of Co2 gas at STP. The mass of KOH required to completely neutralise the gas is

(a) 56 g (b) 28g (c)42g (d) 20g

6. The basicity of aniline is less than that of cyclohexylamine .This is due to

(a) +R effect of – NH2 group

(b) –l-efect of –NH2 group

(c) –R effect of – NH2 group

(d) hyperconjugation effect

7. A distinctive and characteristics functional group of fats is

(a) a peptide group (b) an ester group (c) an alcoholic group (d) a ketonic group

8. Which of the following compound is expected to be optically active?

(a) (CH3)2CHCHO (b) CH3CH2CH2CHO (c) CH3CH2CHBrCHO (d) CH3CH2CBr2CHO

9. Which cycloalkane has the lowest heat of combustion per CH2 group?

(a) Cyclopropane (b) cyclobutane (c) Cyclopentane (d) cyclohexane

10. The physical states of dispersing phase and dispersion medium in colloid like pesticide spray respectively,are

(a) gas, liquid (b) solid, gas (c) liquid, solid (d) liquid, gas

11. Potassium dichromate is used

(a) in electroplating (b) as a reducing agent (c) it oxidises ferrous ions into ferric ions in acidic media as an oxidising agent (d) as an insecticide

12. Which one of the following statements is incorrect for the sucrose?

(a) It is obtained from cane sugar

(b) It is not reducing sugar

(c) On hydrolysis, it gives equal quantities of D-glucose and D-fructose

(d) It gives aspartame when it is heated at 210^0c.

13. Inductive effect involves

(a) displacement of σ-electrons

(b) delocalisation of π-electrons

(c) delocalisation of σ-electrons

(d) displacement of π-electrons

14. The atomic number of Ni and Cu are 28 and 29 respectively. The electronic configuration 1s^2,2s^2,3s^2,3p^6,3d^10 represents

(a) Cu^+ (b)Cu^2+ (c) Ni^2+ (d) Ni

15. In which of the following complex ion,the central metal ion is in a state of sp^3d^2 hybridisation?

(a) [CoF6]^3- (b)[Co(NH3)6]^3+ (c) [Fe(CN)6]^3+ (d) [Cr(NH3)6]^3+

16. ΔG^0 vs T plot in the Ellingham’s diagram slopes downwards for the reactions

(a) Mg + ½ O2 → MgO

(b) 2Ag+ ½ O2 → Ag2O

(c) CO + ½ O2 → CO2

(d) All of the above

17. When a mixture of calcium benzoate and calcium acetate is dry distilled, the resulting compound is

(a) acetophenone (b) benzaldehyde (c) benzophenone (d) acetaldehyde

18. In a metallic crystal

(a) the valence electrons constitute a sea of mobile electrons

(b) the valence electrons are localised in between the kernels

(c) the valence electrons remain within the field of influence of their own kernels.

(d) None of the above

19. Which of the following is correct, based on molecular orbital theory for peroxide ion?

(a) Its bond order is one and it is paramagnetic.

(b) Its bond order is two and it is diamagnetic.

(c) Its bond order is one and it is diamagnetic.

(d) Its bond order is two and it is paramagnetic.

20. Insulin regulates the metabolism of

(a) minerals (b) amino acid (c) glucose (d) vitamins

21. Equivalent weight of a bivalent metal is 37.2. The molecular weight of its chloride is

(a) 412.2 (b) 216 (c) 145.4 (d) 108.2

22. Phenolphthalein is obtained by heating phthalic anhydride with conc. H2SO4 and

(a) benzyl alcohol (b) benzene (c) phenol (d) benzoic acid

23. If K <1.0, what will be the value of ΔG^0 of the following?

(a) zero (b) 1.0 (c) Positive (d) Negative

24. For the titration of KOH vs (COOH)2 .2H2O, the suitable indicator is

(a) methyl orange (b) phenolphthalein (c) methyl red (d) All can be used

25. 2, 2-dichloropropane on hydrolysis yields

(a) acetone (b) 2, 2-propane diol (c) iso-propyl alcohol (d) acetaldehyde