Organic Chemistry MCQs

Organic Chemistry MCQs

1) In the primary alkyl halides, hydrogen is bonded to that carbon atom which is further attached to carbon atoms?
a) 1
b) 2
c) 3
d) none

2) Which of the following is least reactive?
a)H2O
b)ether
c)alcohol
d)H2SO4

3)which of the following is the formula of methylene chloride?
a)CH2Cl2
b)CH3Cl
c)CHCl3
d)CCl4

4) The planer shape is made in which type of hybridization?
a)SP3
b)SP2
c)SP
d)none

5)which catalyst is used to convert carboxylic acid into alcohol?
a)NaBH4
b)LiAlH4
c)H2SO4
d)none

SOLVED BIOLOGY MCAT MCQS

6)methylated alcohol contains:
a)95% alcohol
b)80% alcohol
c)90%alcohal
d)none

7) which is a synthetic polymer?
a)polystyrene
b)PVC
c)polyethylene
d)none

8)the reactivity order of alkyl halides for a particular alkyl group is:
a)F>Cl>Br>I
b)Cl>Br>F>I
c)I>Br>Cl>F
d)Br>I>Cl>F

9 )which has the maximum boiling point?
a)ethanol
b)propanal
c)methanol
d)2-hexanone

10)which one is artificial polymer?
a)lipids
b)starch
c)cellulose
d)polyethylene

11) which of the following is not a Nucleophile?
a)H2O
b)H2S
c)BF3
d)NH3

CHEMISTRY MCQS

12) formula of methylene chloride is:
a)CH2Cl2
b)CH3Cl
c)CHCl3
d)CCl4

13) universal solvent is”
a)H2O
b)ether
c)alcohol
d)H2SO4

14)which of the following is least reactive?
a)ester
b)ether
c)aldehydes
d)ketones

15)when the molecule of H2 is removed from benzene , then it turns into:
a)cyclo-hexane
b)toluene
c)phenol
d)formaldehyde

SOME IMPORTANT IDIOMS

16)which of the following compound can directly be formed from acetic acid?
a)acetamide
b)acetic anhydride
c)acetyl chloride
d)both b &c

17)which of the following reagent will react with both aldehydes and ketones?
a)Grignard reagent
b)Tollen’s  reagent
c)Fehling’s reagent
d)Benedict’s reagent

18) acetylene under pressure over an organo-nickle catalyst at 70 centigrade converts into
a) benzene
b) toluene
c) benzoic acid
d) phenol

19) the mode of hybridization in alkane is _________ and three hybrid orbits are formed
a) sp3
b) sp2
c) sp
d) sp4

20) which of the following agent oxidizes the aldehydes to carboxylic acids
a) alcohol
b) Grignard reagent
c) tollens reagent
d) both a and c

21) the IUPAC name of formic acid is
a) methanoic
b) ethanoic
c) propanoic
d) pentanoic

22) the enzyme which is used for treatment of blood cancer in children is
a) L-asparaginase
b) alkaline phosphatase
c) thrombin
d) LHD-1

23) which of the following test is not given by aldehydes
a) sodium nitroprusside
b) benedict solution
c) fehling solution
d) tollen’s test

24) sodium reacts with alkyl hallides in ether to form alkanes , the reaction is known as
a) wurtz synthesis
b) Grignard reagent
c) nucleophilic substitution
d) none

25) which of the following is the co-factor of carbonic anhydrase
a) Fe+2
b) Zn+2
c) Mg+2
d) Co+2

26) which of them is most reactive
a) alkane
b) alkene
c) alkyne
d) benzene

27) which electrophile is used in the nitration of benzene
a) HNO3
b) NO2+
c) NO3
d) NO2

28) which compound has maximum repulsion with water?
a) C6H6
b) CH3CH2CH2OH
C) C2H5OH
D) CH3OCH3

29) rectified spirit contains alcohol about
a)  98%
b) 90%
c) 95%
d) 80%

30) which acid is used in the manufacture of synthetic fiber
a) formic acid
b) oxalic acid
c) carbonic acid
d) acetic acid

31) which one of the following polymer is addition polymer?
a) polystyrene
b) polyethylene
c) PVC
d) all

32) which one is a water soluble vitamin
a) niacin
b) riboflavin
c) trypsin
d) ascorbic acid

33) in primary alcohols carbon atom is attached to carbon attached to ____ carboxyl group?
a) 1
b) 2
c) 3
d) none

BIOLOGY MCQS FOR MCAT

34) which one of the following is nucleophile
a) H2O
B) NH3
C) BF3
D) HCl

35) ethers show phenomenon of
a) position isomerism
b) metamerism
c) functional group isomerism
d) tautemerism

[Continue reading...]

Chemistry MCQs For MCAT

Chemistry MCQs For MCAT

1- isotopes are sister atoms of same element with similar chemical properties but different
(a) atomic number
(b)atomic volume
(c)atomic mass
(d)atomic structure

2-cadmium has isotopes
a-3
b-6

c-9
d-12

3-atomic masses of elements were determined by
a-john Dalton
b-Berzelius
c-Avogadro
d-Democritus

4-what is the mass of one mole of Iodine molecule.

a-53
b-74
c-250
d-254

5-in combustion analysis CO2 is absorbed in
a-mg(ClO4)2
b-lime water
c-concentrated H2SO
d-50%KOH

6-the collection of Avogadro no of [articles represent
a-molecule
b-empirical formula
c-formula unit
d-mole

7-CO+ is an example of

a-free radical
b-cationic molecular ion
c-stable molecule
d-anionic molecular ion

8-which of the following has the max num of moles
a-1g of H2O
B-40g of H2O
C-36g of H2O
d- none

9-%of O2 in H2O is
a-80%
b-88.8%
c-70%
d-none

1-which of the following has the least critical temperature
a-NH3
b-H2O
c-O2
4-CO2

2-kinetic energy of 3 moles of a gas is
a-3RT
b-RT/2

c-2RT
d-3/2RT

3-the value of gas constant depends upon
a-temp
b-volume
c-no of moles
d-units of volume and pressure

4-at which temp, the hydrogen will have same kinetic energy as nitrogen molecules at 280K/
a-280K
B-400K
C-40K
D-50K

5-the root mean square velocity of an ideal gas at constant pressure varies with demsity as
a-d^2
b-d
c-(d)^1/2
d-1/(d)^1/2

6-which of the following deviates more from the ideal gas behaviour?
a-HCL
B-CH4
C-He
d-N2

7-oxygen gas contained in a flask at S.T.P was replaced by SO2under same conditions . the weight of S02 will be
a-equal to O2
b-half of O
c-twice that of O2
d-thrice that of O2

8-which of the following molecules have max root mean square velocity at 25 degree
a-CO2
B-H2S
C-NH3
D-SO2

1-which of the following has the least critical temperature
a-NH3
b-H2O
c-O2
4-CO2

2-kinetic energy of 3 moles of a gas is
a-3RT
b-RT/2

c-2RT
d-3/2RT

3-the value of gas constant depends upon
a-temp
b-volume
c-no of moles
d-units of volume and pressure

4-at which temp, the hydrogen will have same kinetic energy as nitrogen molecules at 280K/
a-280K
B-400K
C-40K
D-50K

5-the root mean square velocity of an ideal gas at constant pressure varies with demsity as
a-d^2
b-d
c-(d)^1/2
d-1/(d)^1/2

6-which of the following deviates more from the ideal gas behaviour?
a-HCL
B-CH4
C-He
d-N2

7-oxygen gas contained in a flask at S.T.P was replaced by SO2under same conditions . the weight of S02 will be
a-equal to O2
b-half of O
c-twice that of O2
d-thrice that of O2

8-which of the following molecules have max root mean square velocity at 25 degree
a-CO2
B-H2S
C-NH3
D-SO2

1. Which one of the following compounds does not obey Octet rule
a. PF3
b. BF3
c. NF3
d. AsF3

2. Maximum energy is required to remove an electron from
a. s-orbital
b. p-orbitals
c.d-orbitals

d. f-orbitals

3. Among halogens, maximun electron affinity is shown by----
a. Iodine
b. Bromine
c. Chlorine
d. Flourine

4. Bonding maybe 100% ionic when electro-negativity difference is----
a. 0.9
b.1.7
c. 2.4
d. 3.4

5. Ionic bonding is usually formed between the elements of -------- of periodic table
a. Group I and group VII
b. GroupII    and group VII
c. Group I and group VI
d. All of above

6. Which one of the following is a non-polar copmpound.
a. CHCl3
b. CH3OH

c. CCl4
d. CH3Cl

7. How many C0-Ordinate bonds are present in HCLO4.
a. 4
b. 3
c.2
d.1

8. Valence shell electron pair repulsion theory was developed by------
a. Gillespie
b. Sidgwick
c. Powell
d.All of above

1- According to HESSES law,therml effects of a reaction depends upon?

a-initial concentration of reactants
b-initial and final concentrations of reacting substances
c-final conditions of the reacting substances
d-catalyst

2-when ammonium chloride is dissolved in water,the solution becomes cold.the change is?
a-endothermic
b-exothermic

c-super cooling
d-chemical

3-how much heat is liberated when 100ml of 0.1M NaOH are completely neutralized by 100ml of 0.1 MHCl?
a--57kj
c- -5.7kj
d- -6.05kj

4-BORN HEBER cycle is called
a-complete enthalphy cycle
b-complete energy cycle
c-complete internal energy cycle
d-complete heat cycle

5-the atom X nd Y have the electronic configuration shown below
X. 1s2  2s2  2p6 3s2 3p6 3d10 4s2
Y.1s2 2s2 2p4
which of  the following components are they likely to form
a-XY
b-XY2
c-X2Y
d-XY4

6-which of the following moleculeshas zero dipole moment
a-NH3
B- CHCL3
C-H2O

D-BF3
7-ehich of the hydrogen halides has the highest percentage of ionic character
a-HCl
b-HBr
c-HF
d-HI

8-which of the following species has unpaires electrons in antibonding molecular orbital
a-O2-2
b- N2-2
c-B2
d- F2
9-the molecule with largest dipole moment
a-BCl3
b- CO2
c-CO
d-CH4

10-during formation of ionic bond between sodium and chlorine
A- Na attains yhe configuration of Ne
B- Na attains the configuration of Ar
C-Cl attains the configuration of Ne
D- Cl attains the configuration of Na

11-the degree of polarity of molecule is called
A-bond energy
B-dipole moment
C-ionic character
D-coordinate character

[Continue reading...]

Chemistry Chapter two 2 Gases MCQs For MCAT

Chemistry Solved MCQs For MCAT

From Chapter Two Gases 

Q. 1. Professor Qawwi told his students that air is a mixture because: suddenly a student raised his hand and said

a.           it is colourless

b.           oxygen can be removed from it

c.           its composition is different at different altitudes

d.           it has different properties from its constituents

(c)

Q. 2. Imagine Dr. Khan is sitting in a room. The room is closed from all sides, no entry, no exit of any gas. If the room expands suddenly then

a.           he will be frightened

b.           his blood pressure will decrease

c.           he will feel cool

d.           he will feel warmth

(c)

Q. 3. which of the following elements will have strongest Van Der Waal force of attraction between its molecules

a.           hydrogen

b.           oxygen

c.           chlorine

d.           nitrogen

(c)

Q. 4. The beaker shown in the figure contains slurry of ice and water, the three thermometers Fahrenheit, Kelvin and Centigrade placed in it. The thermometers are represented by A, B and C respectively. The lowest reading will be on thermometer.

a.           A

b.           B

c.           C

d.           Both A and C

(c)

Q. 5. Which thermometer will have its reading 273 degrees greater than that of thermometer C?

a.           A

b.           B

c.           C has greater reading than all other thermometer

d.           B has 273 degrees greater reading than A

(b)

Q. 6. The temperature recorded by Kelvin scale is

a.           0K

b.           273K

c.           373K

d.           Absolute scale is unable to record this temperature

(b)

Q. 7. If three birds called O₂, CI₂ and H₂ were flying in the garden of Islamia College Peshawar then,

I.             Fastest birds are O₂ and CI₂

II.           Slowest bird is CI₂

III.          Bird called O₂ is in the middle.

a.           I only

b.           II and III only

c.           I and III only

d.           III only

(b)

Q. 8. One liter of an unknown gas weighs 1.25 grams at S.T.P, one possible formula for the gas is

         

a.           CO₂

b.           CO

c.           O₂

d.           SO₂

(b)

Q. 9. If pressure on a gas is increased from 2 atm to 4 atm than its volume will decrease from

a.           6L to 4L

b.           8L to 2L

c.           3L to 1L

d.           4L to 2L

          (d)

Q. 10.         An unknown gas has a density of 2.45 g/L at 1.5 atmospheric pressure and 25 ^oC. The gas is

a.           Kr

b.           CI₂

c.           SO₂

d.           Ar

(d)

Q. 11.         This is a known fact that the molar volumes of different gases at S.T.P are

a.            little bit greater than the molar volumes of liquids

b.            little bit less than the molar volumes of solids

c.             about the same as the molar volumes of liquids

d.            much larger than the molar volumes of liquids and solids

(d)

Q. 12.         The behavior of a gas is non-ideal at

a.           lo2w temperature and low pressure

b.           high temperature and high pressure

c.           high temperature and low pressure

d.           low temperature and high pressure

(d)

Q. 13.         Ammonium Perchlorate is used as solid fuel in rockets. During the process it decomposes according to the reaction given below

          4NH₄CIO_4(g)                      2CI_2(g)  +8H₂O_(g)  +2N₂O_(g)  +3O_2(g)

The total volume of all the gases produced at S.T.P by the decomposition of 8 moles of Ammonium Perchlorate will be

a.           30 L

b.           672 L

c.           179.0 L

d.           60 L

(b)

Q. 14.         Compressed natural gas (CNG) contains mainly methane CH₄. Methane gas burns in air according to the following reaction.

                   CH_4(g) + 2O_2(g)               CO_2(g) + 2H₂O_(g)

         

If 8 g of methane is burnt, what volume of CO₂ measured at S.T.P. will be produced?

a.   0.5 L

b.   22 L

c.   22.4 L

d.   11.2 L

(d)

Q. 15.         A kid has a helium filled balloon which deflates at the rate of 1.00 liter/day by He gas leaking through the relatively porous skin of the balloon. How fast would carbon dioxide (CO₂) leak from a balloon made of the same material?

a.           3.0 L/day

b.           0.3 L/day

c.           1.33 L/day

d.           3.33 L/day

(b)

Q. 16.         All of the following statements are false except

a.           gas molecules do not attract each other at very low temperature

b.           all of the gases cannot be liquefied

c.           increase in pressure will not decrease the intermolecular distance in a gas

d.           actual volume of a gas is not negligible at very high pressure

(d)

Q. 17.         At the same temperature and pressure helium is more ideal than hydrogen due to

a.           greater molar mass

b.           less molar mass

c.           greater molecular size

d.           less molecular size

(d)

Q. 18.         A container with a porous wall has a mixture of H₂, He, N₂ and O₂. Which of these gases will take maximum time in getting out of the container?

a.           H₂

b.           He

c.           N₂

d.           O₂

(d)

Q. 19.         The value of  for an unknown gas is equal to

a.           0.082 L.atm.mol^-1.K

b.           0.082 L.atm.mol^-1.K^-1

c.           0.82 L.atm.mol.K^-1

d.           0.82 L.atm.mol.K

(b)

Q. 20.         If the temperature of the atmosphere is 30^oC then which of the following will have highest average speed

a.           O₂

b.           H₂

c.           Ne

d.           N₂

          (b)

Get ECAT,MCAT MCQs, All NTS Test, English Grammar, Vocabulary, CSS. SPCS FPCS KKPCS PPCS Notes and Past Papers

[Continue reading...]