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| 45 CHEMISTRY MCQ |
Extra ordinary MCQ for Chemistry for those aspirant who is going to appear NEET UG , JIPMER ,
AIIMS , JEE MAINS exam . These type of MCQ will help them for entrance exam preparation.
Try to solve all those questions to check your preparation level .
1. When CH3COOH reacts with CH3 --MgX :
a) CH3COX is formed b) Hydrocarbon is formed c) acetone is formed d) alcohol is formed
2. Which will reduce zinc oxide to zinc ?
a) Mg b) Pb c) Cu d) Fe
3. By Wurtz reaction , a mixture of methyl iodide and ethyl iodide gives :
a) butane b) ethane c) propane d) A mixture of the above three
4. Addition of SnCl 2 to HgCl 2 gives ppt :
a) white turning to red b) white turning to grey c) black turning to white d) none
5. In fermentation by zymase, alcohol and CO 2 are obtained from :
a) invert sugar b) glucose c) fructose d) all
6. The stability of ferric ion is due to :
a) half filled f - orbital b) half filled d- orbital c) completely filled f -orbital d) completely filled
d-orbital
7. Ionisation potential for anoble gas is :
a) maximum in a period b) minimum in a period c) either minimum or maximum d) constant
8. Ethyl Amine on acetylation gives :
a) N - ethyl acetamide b) acetamide c) methyl acetamide d) none
9. Strongest oxidising agent among halogen is :
a) I 2 b) Br 2 c) Cl 2 d) F2
10.Which reagent can convert acetic acid into ethanol ?
a) Na + alcohol b) LiAlH 4 c) H 2 + Pt d) Sn + HCl
11. In presence of moisture SO 2 can :
a) act as oxidant b) act as reductant c) gain electron d) not act as reductant
12. Acetals are :
a) ketones b) diethers c) aldehydes d) hydroxy aldehydes
13. The principle involved in the classification of basic radicals is :
a) common ion effect b) solubility product c) valency of radicals d) strength of salt
14. Formation of diethyl ether from ethanol is based on a :
a) dehydration reaction b) dehydrogenation reaction c) hydrogenation reaction d) homolytic fission
reaction
15. Hypo phosphorous acid is H 3PO 4 is :
a) a monobasic acid b) a tribasic acid c) a dibasic acid d) not acidic at all
16. What is obtained when acetyl chloride is heated with benzene in presence of anhydrous AlCl 3 ?
a) Acetyl Benzoic acid b) Anisol c) Acetophenone d) Chlorobenzene
17. Which gas is used in aerated water ?
a) CO 2 b) SO 2 c) CO d) water vapours
18. Solder is an alloy of lead with :
a) Copper b) Zinc c) Nickel d) Tin
19. Which of the following radicals gives the apple green flame during flame test ?
a) Ba 2+ b) Sr 2+ c) Ca 2+ d) Cr 3+
20. When chlorine is passed through concentrated solution of KOH the compound formed is :
a) KClO 4 b) KClO 3 c) KClO 2 d) KClO
21. Atomic radii of F and Ne in angstom (A*) are given by :
a) 0.72 , 0.71 b) 0.72 , 1.6 c) 1.6 , 1.58 d) 0.71 , 0.72
22. Which pair has both members from the same period of periodic table ?
a) Cl , Br b) Ca , Cl c) Na , Ca d) Na , Cl
23.The charge required to liberate one gram equivalent of an element is :
a) 96500 Faraday b) 1 Faraday c) 1 Coulomb d) none of these
24. The shape of the sulphate ion is :
a) square plannar b) trigonal c) trigonal planar d) tetrahedral
25. The H-H bond energy is 430 kJ/mol and Cl - Cl bond energy is 240 kJ / mol delta H for HCl is
- 90 kJ . The H - Cl bond energy is about :
a) 180 kJ / mol b) 360 kJ / mol c) 213 kJ / mol d) 425 kJ / mol
26. The energy released in an atom bomb explosion is mainly due to :
a) release of neutrons b) release of electrons c) greater mass of products than initial material
d) lesser mass of products than initial material
27. Highest entropy is in :
a) hydrogen b) water c) graphite d) mercury
28. Which one will liberate Br 2 from KBr ?
a) I 2 b) SO 2 c) HI d) Cl 2
29. Nuclides :
a) have specific atomic numbers b) have same number of protons c) have specific atomic number
and mass number d) are isotopes
30. Chloroform , on warming with Ag powder gives :
a) C 2 H 6 b) C 2 H 6 c) C 2 H 4 d) C 2 H 2
31. 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
32. An orbital in which n = 4 and l = 2 is expressed by
a) 4s b) 4p c) 4d d) sp
33. Which of the following does not give a borax bead test ?
a) Ferrous salt b) Chromium c) Cobalt d) Sodium
34. Molecular formula of chloropicrin is :
a) CHCl 3NO 2 b) CCl 3NO 3 c) CCl 2NO 2 d) CCl 3NO 2
35. Hydrogen peroxide is prepared in the laboratory by :
a) adding MnO 2 to dil H 2SO 4 b) by passing CO 2 into BaO 2 c) by adding Na 2O 2 to cold water
d) by adding PbO 2 into KMnO 4
36. Cyanohydrin of which of the following forms lactic acid ?
a) CH 3CH 2CHO b) CH 3CHO c) HCHO d) CH 3COCH 3
37. An important product in the ozone depletion by chloroflurocarbons is :
a) Cl 2 b) OCl c) OF 2 d) O 2F 2
38. Propylene on hydrolysis with sulphuric acid forms
a) n -propyl alcohol b) isopropyl alcohol c) ethyl alcohol d) butyl alcohol
39. The volume of oxygen liberated from 15ml of 20 volume H 2O 2 is :
a) 250ml b) 300 ml c) 150ml d) 200ml
40. Which of the aldehyde is most reactive ?
a) C 6H 5-CHO b) CH 3CHO c) HCHO D) all are equally reactive
41. Aspirin is chemically :
a) methyl benzoate b) ethyl salicylate c) ethyl salicylic acid d) 2 - acetoxy benzoic acid
42. What is obtained when chlorine is passed in boiling toluene and product is hydrolysed ?
a) o -Cresol b) p - Cresol c)2 ,4 -dihydroxy toluene d) Benzyl alcohol
43. Nitroethane can exhibit one of the following kind of isomerism :
a) metamerism b) optical activity c) tautomerism d) position isomerism
44. In which of the following processes platinum is used as a catalyst ?
a) Oxidation of ammonia to form HNO 3 b) Hardening of oils
c) Production of synthetic rubber d) synthesis of methanol
45. In the first order reaction , the concentration of the reactants is reduced to 25 % in one hour. The
half life period of the reaction is :
a) 2 hr b) 4 hr c) 1/2 hr d) 1/4 hr
BEST OF LUCK
ANSWER WILL BE PUBLISHED ON 8TH FEBRUARY 2017
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