 | ||
| CHEMISTRY MCQ FOR MEDICAL ENTRANCE |
1. A mixture of methyl alcohol and acetone can be separated by :
a) distillation b) fractional distillation c) steam distillation d) distillation under reduced pressure
2. According to Bohr's theory the energy required for the transition of H - atom from n = 6 to n =8 state
is :
a) equal to the energy required for the transition from n = 5 to n =7 state
b) larger than in (a ) c) less than in (a ) d) equal to the enrgy required for the transition from n=7
to n = 9 state .
3. The value of the energy for the first excited state of hydrogen atom will be:
a) -- 13.6 eV b) -- 3.4 eV c) -- 1.51 eV d) -- 0.85 eV
4. Of the following radiations the one most easily stopped by air is :
a) Alpha rays b) Beta rays c) Gama rays d) X - rays
5. If 2.0g of a radioactive isotope has a half life of 20hr the half life of 0.5 g of the same substance is :
a) 20 hr b) 80 hr c) 5 hr d) 10 hr
6. The first artificial disintegration of an atomic nucleus was achieved by :
a) Geiger b) Wilson c) Soddy d) Rutherford
7. Sulphuric acid provides a simple example of :
a) Co-ordination bond b) non - covalent compound c) covalent bond d) non - covalent ion
8. Each carbon in carbon suboxide is :
a) sp 2 hybridised b) sp 3 hybridised c) sp hybridised d) sp 2 hybridised but linked with one
co -ordinate bond.
9. Among the following the weakest base is :
a) H ⁻ b) CH₃⁻ c) CH₃O⁻ d) Cl⁻
10. Which of the following has the highest nucleophilicity ?
a) F⁻ b) OH ⁻ c) CH₃⁻ d) NH₂⁻
11. Air at sea level is dense . This is a practical application of :
a) Boyle's law b) Charles law c) Avogadro's law d) Dalton's law
12. The Vander Waal's equation reduces itself to the ideal gas equation at :
a) high pressure & low temperature b) low pressure & low temperature
c) low pressure & high temperature d) high pressure & high temperature
13. For an ideal gas , the number of moles per litre in terms of its pressure P , gas constant R and
temperature T is :
a) PT / R B) PRT C) P / RT D) RT / P
14. In hcp arrangement in three dimensions the overall co-ordination number of each sphere is :
a) 4 b) 6 c) 9 d) 12
15. The depression of freezing point is directly proportional to :
a) mole fraction of the solution b) molarity of the solution c) molality of the solution
d) molarity of the solvent
16. The rate of forward reaction is two times that of the reverse reaction at agven temperature & identical
concentration Keq is :
a) 0.5 b) 1.5 c) 2.5 d) 2.0
17. The common method of extraction of metals from oxide ore is :
a) reduction with carbon b) reduction with hydrogen c) reduction with aluminium
d) electrolytic method
18.Lanarkite is an ore of :
a) lead b) calcium c) zinc d) iron
19. Lithium is strongest reducing agent among alkali metals due to the :
a) ionisation energy b) electron affinity c) hydration energy d) lattice energy
20. Excess of sodium ion in human system causes :
a) diabetics b) anemia c) low blood pressure d) high blood pressure
21. Potassium superoxide is used in oxygen cylinders in space and submarine because it :
a) eliminates moisture b) absorbs carbon di oxide c) produces ozone d) none of the above
22. On heating quick lime with coke in an electric furnace we get :
a) Ca & carbondi oxide b) Calcium carbonate c) Calcium oxide d) Calcium carbide
23. 1 mole hydrogen & 2 mole iodine are taken initially in a 2L vessel. The number of moles of hydrogen at
equilibrium is 0.2 . Then the number of moles of Iodine and hydrogen iodide at equilibrium are :
a) 1.2 , 1.6 b) 1.8 , 1.0 c) 0.4 , 2.4 d) 0.8 , 0.2
24. Aluminium oxide is not reduced by chemical reaction since :
a) aluminium oxide is highly stable b) aluminium oxide is reactive c) reducing agents contaminate
d) the process pollutes the environment
25. Borazole is known as :
a) organic benzene b) organic compound c) inorganic benzene d) inorganic compound
26. The prefixes syn and anti are used to denote :
a) structural isomers b) conformational isomers c) geometrical isomers d) optical isomers
27. All bond in benzene are equal due to :
a) tautomerism b) I - effect c) sp 2 hybridisation d) isomerism
28. How many cyclic isomers of Pentane are possible :
a) 4 b) 3 c) 2 d) 5
29. Which of the following can be produced from a salt ?
a) Ethyne b) Ethene c) Methane d) Ethane
30. Which of the following has lowest octane number ?
a) Iso -octane b) n -heptane c) TEL d) n -hexane
31. Red liquor is :
a) magnesium aluminate b) ammonium hydroxide c) aluminium hydroxide d) aluminum acetate
32. Which of the following has ionic , covalent and co-ordinate bonds ?
a) CaSO4 . 5H2O b) CuSO4 . 5 H2O c) BF4 minus d) none of these
33. A reaction in which same substances is oxidised and reduced is known as :
a) disproportionation b) dehydrogenation c) amphoteric reaction d) replacement reaction
34. When a mango is kept in dilut aqueous solution of HCl it :
a) swells b) bursts c) shrinks d) remain same as earlier
35. Chloramine - T is used as :
a) antipyretic b) analgesic c) antiseptic d) disinfectant
36. Ammonium ion is :
a) a conjugate acid b) a conjugate base c) neither an acid nor a base d) both an acid & a base
37. Drying oil invariably contain :
a) Butyric acid b) Lauric acid c) Linoleic acid d) Stearic acid
38. What amount of bromine will be required to convert 2g of phenol into 2 ,4,6 tribromo phenol ?
a) 4.00 b) 6.00 c) 10.22 d) 20.44
39. Diolefins are :
a) Compounds containing two double bonds in a molecule
b) Compounds containig no double bond in a molecule
c) Compounds containing triple bond in a molecule
d) compounds containing single bonds in a molecule
40. Iron loses magnetic property at :
a) curie point b) boiling point c) melting point d) 1000 k
41. Dipole moment is shown by :
a) 1,4 - dichlorobenzene b) cis- 1, 2 - dichlorobenzene c) trans - 1 ,2 - dichloroethene
d) trans - 2 ,3 - dichloro - 2 - butene
42. Nitrates of all metals are :
a) soluble in water b) insoluble in water c) coloured d) unstable
43. Quartz is a / an :
a) orthosilicate b) pyrosilicate c) sheet silicate d) three dimensional silicate
44. Sal ammoniac is :
a) ammonium hydroxide b) liquor ammonia c) ammonum chloride d) ammonium sulphate
45. Isobars are formed when emission takes place of :
a) 1 Alpha & 1 Beta particle b) 2 Alpha & 1 Beta particles c) 1 Beta emission
d) 1 alpha emission
ALL THE BEST
No comments:
Post a Comment