MCAT Chemistry MCQs

MCAT Chemistry MCQs

               Chemistry MCQs For MCAT       

MCAT Chemistry MCQs

 

1.In the reaction 4NH³+5O-------------->4NO+6H²O, When 1 mole of NH³ And 1 mole of O² are made to react complete then:

A)1mole of water is produced

B)All oxygen is consumed

C)1mole of NO Is formed
D)All ammonia is consumed

 

2.The rate of diffusion of gas is:

A)Directly proportional to its density

B)Directly proportional to its molecular weight
C)Inversely proportional to square root of the molecular density

D)Inversely proportional to its molecular weight

 

3.Most energetic rays are:

A)Visible

B)TV Rays

C)Radio waves

D)Infra red

 

4. Quantum numbers are related with

 

A) Hund’s rule

B)Aufbau principle

C)Pauli’s exclusion priciple

D)NOT

5.Subsidiary quantum numbers governs the:

A)Shape of orbital

B)Size of orbital

C)Orientation of orbital in space

D)Energy of electron

 

6.Oxygen molecule is

 

A)Paramagnetic

B)Diamagnetic

C)Ferromagnetic

D)ALL                         

 

7.The hybridization of C-2 in buta-1,2-diene is

 

A)sp³

B)sp²

C)sp

D)NOT

8.The addition of catalyst to a reaction

 

A)Change in enthelpy

B)Changes the entropy

C)Changes the nature of the products

D)Changes the activation energy

E)NOT

 

9.Potassium dichromate has  _____________ colour in solution.

 

A)Blue

B)Lemon yellow

C)Orange-red

D)Green

 

10.A substance which gives the electrons is called

 

A)Reducing agent

B)Oxidising agent

C)Both

D)No any

 

11.The end point of an acid-base titration is often detected by

A)Indicators

B)Buffer solution

C)Litmus paper

D)No any

 

12.The colour of universal indicator in neutral solution is

 

A)Red

B)purple

C)Blue

D)Green

 

13.On rising the pressure to 2000 atmosphere the conductance of acetic acid falls to ______ of its original value

 

A)0.6%
B)0.9%
C)0.2%
D)No any

 

14.What is the percentage by mass of sulfur in H2SO4?

A)16%
B)33%
C)36%
D)42%

15.The significant figure for 41000*273 is

A)11193000
B)120000000
C)11000000
D)11200000

 

16.Cgaracteristic of 0.001 is

 

A)1
B)2
C)-2
D)-3

17.How many significant zero(s) are is(are) in 200.0

 

A)1
B)2
C)3
D)4

 

18.Standard conditions (STP) are

 

A)0°C and 2atm
B)32F and 76torr
C)0K and 760 mm Hg
D)273K and 760torr

19.How many atoms are in 1 mole of water

A)3
B)54
C) 6.02*10²³
D)2(6.02*10²³)

20.What will be the number when 144.44 is rounded off to two SF?

A)144
B)150
C)15
D)140

 

21.A gas will approach ideal behavior at  

 

A)High temp and high pressure
B)High temp and low pressure
C)Low temp and High pressure
D)Low temp and low pressure

 

22.Evaporation causes

A)High pressure
B)High temp
C)Cooling
D)Vapour pressure

 

23.Two substances that have same crustal structure are said to be

A)anisotropic
B)isotropic
C)polymorphous
D)isomorphous

24. Radioactive material doesn’t emit

 

A)neutrons

B)protons

C)electrons

D)alpha particles

 

25.Atoms of different elements having identical mass number are known as

 

A)Isotopes

B)Isobars

C)Isotones

D)Isomorphous

 

26.Which rays of radioactive disintegration ionize gases to the maximum extant

 

A)Alpha rays
B)beta rays
C)gamma rays
D)x-rays

 

27.Which  of the following metal is most reactive

A)Sodium
B)Magnesium
C)Copper
D)Gold
E)Chlorine

 

28.which of the following is most electronegative element

A)Oxygen
B)Copper
C)Nitrogen
D)Carbon

 

29.An orbital never be occupied by

A)1electron
B)2electron
C)3electron
D)0electron

 

30.Identify the element with the greatest fist ionizing energy

 

A)C

B)O

C)F

D)Cl

 

31.The enzyme which converts maltose into glucose is:

A)Maltase
B)Diastase
C)Zymase
D)All of these

 

32.____________is use as solvent in ‘Wurtz reaction’.

A)Methyl alcohal
B)Ethyl alcohal
C)Ether
D)a and b only

 

33.Which of the following gives positive tollen’s test

A)Diethyl acetone
B)Ketone
C)Formaldehyde
D)Aldehyde

 

34.Phenol produces ___________-When reacts with:

A)zinc phenoxyde
B)Benzene
C)Phenol
D)Acetone

 

35.Bleaching powder reacts with acids it produces:

A)Cl gas
B)H gas
C)O gas
D)No any

 

36.The diagonal neighbour of Lithium is

A)Beryllium
B)Magnesium
C)Calcium
D)No any

 

37.The elements of s-block elements form ionic compounds except

 

A)Ra
B)Be
C)Rb
D)Ca

 

38.Molecular mass of heavy water is

 

A)18
B)16
C)20
D)22

39.To which family does Ga belongs

A)Boron
B)carbon
C)Nitrogen
D)Flourine

 

40.In which period is the most Electronegative element is found

 

A)7
B)1
C)3
D)2

 

41.Which one of the following is radioactive Hydrogen

 

A)Protium
B)Tritium
C)Deutrium
D)Uranium

 

42.Which group of periodic table includes coinage elements

 

A)1-B
B)2-B
C)4-B
D)5-B

 

43.The bond angle of C-C-H and C-C-C in benzene ring is

A)120°
B)180°
C)109.5°
D)NOT

 

44._____________is used as anaesthetic and in manufacture of mustard gas:

A)Ethane
B)Ethyne
C)Ethene
D) Methene

45.each carbon atom of ethene is _____

A)sp
B)sp²
C)sp³

 

46.Methane is ___________ gas

A)Colourless
B)Odourless
C)Non-poisonous
D)A.O.T

 

47.In bimolecular elimination reaction, rate of reaction depends upon:

 

A)One molecule
B)two molecule
C)One or two molecule
D)NOT

 

48.The REACTION in which two molecules take part in rate determining step is called:

A)SN1
B)SN2
C)SN
D) A and B only

 

49.Alkyl halides are prepares from

A)alcohals
B)alkenes
C)alkanes
D)AOT

 

50.In SN reaction, alkyl halides is called

A)Substrate
B)Leaving nucleophile       C)Attacking nucleophile
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MCAT Chemistry MCQs Answer Key

Answer Key

1	B	9	C	17	C
2	C	10	A	18	D
3	C	11	A	19	C
4	C	12	D	20	-
5	A	13	A	21	B
6	A	14	B	22	C
7	C	15	C	23	D
8	D	16	D	24	B

 

 

25	B	33	C	41	B
26	A	34	B	42	A
27	-	35	A	43	A
28	A	36	B	44	C
29	C	37	B	45	B
30	D	38	C	46	D
31	A	39	A	47	B
32	C	40	D	48	B

 

 

49	D
50	A