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Question Bank for NEET Chemistry

NEET Chemistry

National Eligibility Cum Entrance Test – NEET Chemistry Free Mock Test:

Online Tes for NEET Medical Entrance Exam on Chemistry single answer objective type questions as NEET / CBSE PMT exam pattern.

NEET Chemistry Test

Question 1
At 25o C temperature the 730 mm pressure, 380 ml of dry oxygen was collected. If the temperature in the field constant, what volume will the oxygen occupy at 760 mm pressure?
A
569 ml
B
449 ml
C
365 ml
D
621 ml
Question 2
What causes nitrogen to be chemically inert?
A
Multiple bond formation in the molecule
B
Short internuclear distance
C
Absence of bond polarity
D
High bond energy
Question 3
The pH of the solution: 5mL of M/5, HCl + 10 mL of M/10 NaOH is
A
5
B
8
C
7
D
3
Question 4
Which functional group participates in disulphide bond formation in proteins
A
Thiol
B
Thioester
C
Thiolactone
D
Thioether
Question 5

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What causes nitrogen to be chemically inert?
A
Multiple bond formation in the molecule
B
Absence of bond polarity
C
Short internuclear distance
D
High bond energy
Question 6
Normal aluminium electrode coupled with normal hydrogen electrode gives an  of 1.66 volts. So the standard electrode potential of aluminium is
A
+ 0.83 V
B
+ 1.66 V
C
– 0.83 V
D
– 1.66 V
Question 7
The order of decreasing ease of reaction with ammonia is
A
ethers, anhydrides, esters
B
anhydrides, ethers, esters
C
anhydrides, esters, ethers
D
esters, ethers, anhydrides
Question 8
In the reaction The compound X is
A
o-xylene
B
Phthalic acid
C
Benzoic acid
D
Phthalic anhydride
Question 9
The common acid used in the manufacture of rayon and plastics is
A
Propanoic acid
B
Methanoic acid
C
Ethanoic acid
D
Butanoic acid
Question 10
Amorphous solids may also be classified as
A
superheated solids
B
supercoolied liquids
C
superheated liquids
D
supercooled solids
Question 11

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How many milliliters of 6.0 M HQ should be used to prepare 150 ml of a solution which is 0.3 M in hydrogen ion?
A
3.0
B
7.5
C
0.3
D
–30
Question 12
An ideal solution was obtained by mixing methanol and ethanol. If the partial vapour pressure of methanol and ethanol are 2.619 kPa and 4.556 kPa respectively, composition of the vapour (in terms of mole fraction) will be
A
0.50 methanol and 0.50 ethanol
B
0.173 methanol and 0.827 ethanol
C
0.635 methanol and 0.365 ethanol
D
0.365 methanol and 0.635 ethanol
Question 13
In the reaction between ozone and hydrogen peroxide, H2O2 acts as
A
Bleaching agent
B
Oxidising agent
C
Both oxidising and bleaching agent
D
Reducing agent
Question 14
The element which has most stable +2 state

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A
C
B
None of these
C
Si
D
Sn
Question 15
The electrons identified by quantum numbers n and l (i) n = 4, l = 1 (ii) n = 4, l = 0 (iii) n = 3, l = 2 (iv) n = 3, l = 1 can be placed in order of increasing energy from the lowest to highest, as
A
(ii) < (iv) < (i) < (iii)
B
(iv) < (ii) < (iii) <(i)
C
(i) < (iii) < (ii) < (iv)
D
(i) < (iv) < (Ii) < (iii)
Question 16
In the following compounds The order of acidity is
A
I > IV > III > II
B
III > IV > I > II
C
II > I > III > IV
D
IV > III > I > II
Question 17
Which of the following undergoes nucleophilic substitution by SN1 mechanism
A
Benzyl chloride
B
Isopropyl chloride
C
Chlorobenzene
D
Ethyl chloride
Question 18
One mole of potassium dichromate completely oxidises the following number of moles of ferrous sulphate in acidic medium
A
6
B
3
C
1
D
5
Question 19
The total number of stereoisomeric forms of C6H6Cl6 known is
A
3
B
6
C
8
D
7
Question 20

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A radioactive element has a half-life of 20 minutes. How much time should elaspe before the element is reduced to 1/8 th of the original mass
A
160 minutes
B
60 minutes
C
80 minutes
D
40 minutes
Question 21
The temperature coefficient of most of the reactions lies between
A
1 and 4
B
2 and 4
C
1 and 3
D
2 and 3
Question 22
Which of the following sets of quantum numbers represents the highest energy of an atom?
A
n = 3, l = 0, m = 0, s = + 1/2
B
n = 3, l = 2, m = 1, s = + 1/2
C
n = 4, l = 0, m = 0, s = + 1/2
D
n = 3, l = 1, m = 1, s = + 1/2
Question 23

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The temperature above which a gas remains ideal over a wide range of pressure is called
A
critical temperature
B
ideal temperature
C
Boyle’s temperature
D
boiling point
Question 24
The coordination number of a cation occupying a tetrahedral hole is
A
6
B
8
C
4
D
12
Question 25
If concentration of reactants is increased by ‘x’, then K becomes
A
K
B
ln (K/x)
C
K + x
D
K/x
Question 26
Froth floatation process for the concentration of ores is an illustration of the practical application of
A
coagulation
B
adsorption
C
sedimentation
D
absorption
Question 27
What amount of ammonia is formed when 50 g each nitrogen and hydrogen react with each other?
A
50.0 g
B
100.0 g
C
34.0 g
D
60.7 g
Question 28
An example of a salt dissolved in water to give acidic solution is
A
potassium nitrate
B
ammonium chloride
C
barium bromide
D
sodium acetate
Question 29

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The most common lanthanide is
A
Lanthanum
B
Cerium
C
Samarium
D
Plutonium
Question 30
How much of CaCO3 (in grams) should be decomposed to get enough CO2 which can convert 0.1 mole of Na2CO3 into NaHCO3?
A
100.0 g
B
10.0 g
C
20.0 g
D
5.0 g
Question 31
The amount of KMnO4 required to prepare 100 ml of 0.1 N solution in alkaline medium is
A
0.52 gm
B
1.58 gm
C
0.31 gm
D
3.16 gm
Question 32

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Which electronic level would allow the hydrogen atom to absorb a photon but not to emit a photon
A
3s
B
2s
C
1s
D
2p
Question 33
TiH1.73 is an example of
A
Ionic hydride
B
Covalent hydride
C
Metallic hydride
D
Polymeric hydride
Question 34
In the thermal dissociation of PCl5, the partial pressure in the gaseous equilibrium mixture is 1.0 atmosphere when half of PCl5 is found to dissociate. The equilibrium constant of the reaction (Kp) in atmosphere is
A
0.25
B
0.50
C
1.00
D
0.3
Question 35
At 100o C, Kw = 10–12. pH of pure water at 100o C will be:
A
7.0
B
8.0
C
6.0
D
12.0
Question 36
Pb++, Cu++, Zn++, and Ni++ ions are present in a given acidic solution. On passing hydrogen sulphide gas through this solution the available precipitate will contain

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A
CuS and ZnS
B
PbS and CuS
C
PbS and NiS
D
CuS and NiS
Question 37
Ligands in a complex are
A
ions or molecules linked by coordinate bonds to a central metal atom or ion
B
cations linked by coordinate bonds to a central metal atom or ion
C
anions linked by coordinate bonds to a central metal atom or ion
D
molecules linked by coordinate bonds to a central metal atom or ion
Question 38
Which of the following metals will not react with solution of CuSO4
A
Zn
B
Fe
C
Ag
D
Mg
Question 39
If 60% of the first order reaction was completed in 60 minutes, of the (given log 4 = 0.60; log 5 = 0.69) same reaction would be completed in approximately
A
60 minutes
B
50 minutes
C
45 minutes
D
40 minutes
Question 40
At 500 K, the half life period of a gascons reaction at an initial pressure of 80 K Pa is 350 s. When the pressure is 40 K Pa, the half life period is 175 s, the order of the reaction is
A
two
B
zero
C
cannot be predicted
D
one
Question 41
Choose the correct IUPAC name of the compound
A
4,5-dimethyl-2-hexyne
B
5-propyl-2-pentyne
C
2-propyl-3-pentyne
D
2, 3-dimethyl-4-hexyne
Question 42
An aqueous solution of FeCl3 (formula mass = 162) has a density of 1.1 g ml–1 and contains 20% FeCl3. Molarity of this solution is
A
0.028
B
0.2
C
1.27
D
0.163
Question 43

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Of the following substances the one which does not contain oxygen is
A
Dolomite
B
Epsom salt
C
Cryolite
D
Bauxite
Question 44
A
Increases the average kinetic energy of reacting molecules
B
Increases the activation energy
C
Increases the frequency of collisions of reacting species
D
Alters the reaction mechanism
Question 45
200 ml of phosphine decomposes to produce solid phosphorous and hydrogen. The change in volume is
A
75 ml increase
B
75 ml decrease
C
100 ml increase
D
100 ml decrease
Question 46
The lightest metal is
A
Ca
B
Na
C
Li
D
Cl
Question 47
If 20 ml of methane (measured at room temperature) is burnt in 50 ml of oxygen, the volume of the gases left after cooling to room temperature will be
A
50 ml
B
20 ml
C
70 ml
D
30 ml
Question 48
In a photochemical reaction, the ratio of number of dissociate molecules and number of quanta of absorbed energy is called
A
Quantum constant
B
Planck constant
C
Quantum efficiency
D
Einstein
Question 49
The most stable oxidation state of Mn is
A
+7
B
+5
C
+2
D
+4
Question 50
Which of the following is an extensive property
A
Gibb’s free energy
B
temperature
C
chemical potential
D
Molar volume
Question 51
The boiling point of a solution of 0.11 gm of a substance in 15 gm of ether was found to be 0.1o C higher than that of the pure ether. The molecular weight of the substance will be (Kb = 2.16)
A
178
B
148
C
158
D
168
Question 52
The oxidation state of Fe in K4[Fe(CN)6] is
A
–2
B
+4
C
+2
D
+3
Question 53
What is the entropy change (in JK–1 mol–1) when one mole of ice is converted into water at 0o C (The enthalpy change for the conversion of ice to liquid water is 6.0 kJ mol–1 at 0oC)
A
20.13
B
21.98
C
2.198
D
2.013
Question 54
The standard enthalpy or the decomposition of N2O5 to NO2 is 58.04 kJ and standard entropy of this reaction is 176.7 J/K. The standard free energy change for this reaction at 25o C is
A
5.38 kJ
B
–5.38 kJ
C
5.38 kJ
D
–538 kJ
Question 55

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The electronegativity of C, H, O, N and S are 2.5, 2.1, 3.5, 3.0 and 2.5 respectively. Which of the following bond is most polar
A
C – H
B
S – H
C
O – H
D
N – H
Question 56
The order of reactivity of halogen acids for reaction with C2H5OH is
A
HBr > HI > HCl
B
HCl > HBr > HI
C
HI > HBr > HCl
D
HBr > HCl > HI
Question 57

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Aldehydes are produced in atmosphere by
A
Oxidation of secondary alcohols
B
Reaction of oxygen atoms with hydrocarbons
C
Reduction of alkenes
D
Reaction of oxygen atoms with ozone
Question 58
A deuteron contains
A
1 neutron and 1 positron
B
1 neutron and 2 protons
C
1 neutron and 1 proton
D
2 neutrons and 1 proton
Question 59
The ability of a catalyst to accelerate the chemical reaction is known as
A
None of these
B
Activity
C
Selectivelty
D
Negative catalyst
Question 60
A solution of a salt of a metal was electrolysed for 150 minutes with a current of 0.15 amperes. The weight of metal deposited was 0.783 gm. The equivalent weight of the metal is
A
55.97 gm
B
85.97 gm
C
75.97 gm
D
65.97 gm
Question 61
The Langmuir adsorption isotherm is deduced using the assumption
A
the adsorption sites are equivalent in their ability to absorb the particles
B
the adsorbed molecules interact with each other
C
the heat of adsorption varies with coverage
D
the adsorption take place in multi layers
Question 62
If the average velocity of N2 molecule is 0.3 m/s at 27o C, then the velocity will be 0.6 m/s at
A
1200 K
B
1800 K
C
400 K
D
600 K
Question 63
How many grams of CaC2O4 will dissolve in distilled water to make one litre of saturated solution? (Solubility product of CaC2O4 is 2.5  10–9 mole2 litre–2 and its molecular weight is 128)
A
0.0640 gm
B
0.0032 gm
C
0.0064 gm
D
0.0128 gm
Question 64
Which of the following elements will have the lowest electron affinity
A
Flourine
B
Nitrogen
C
Chlorine
D
Phosphorus
Question 65
When the same amount of zinc is heated separately with an excess of H2SO4 and an excess of NaOH, the ratio of the volumes of hydrogen evolved is
A
3 : 2
B
1 : 1
C
1 : 2
D
2 : 1
Question 66
Nature of the bond formed between two elements depends on the
A
Electronegativity
B
Oxidation potential
C
Ionization potential
D
Electron affinity
Question 67
Same mass of CH4 and H2 is taken in container. The partial pressure caused by H2 is

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A
1 / 9
B
1 / 2
C
8 / 9
D
1
Question 68
Reductive ozonolysis of benzene produces

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A
Glyoxal
B
Acetone
C
Maleic anhydride
D
Phthalic acid
Question 69
Wax is an example of
A
Covalent crystal
B
Metallic crystal
C
Molecular crystal
D
Ionic crystal
Question 70
Which of the following compound gives dye test
A
Methylamine
B
Ethylamine
C
Aniline
D
Diphenylamine
Question 71
To a mixture of acetic acid and sodium acetate a further amount of sodium acetate is added. Then pH of the mixture
A
decreases
B
is unaltered
C
unpredictable
D
increases
Question 72
Temporary hardness of water is due to the pressure of
A
calcium chloride
B
calcium carbonate
C
magnesium bicarbonate
D
magnesium sulphate
Question 73
According to Le-Chatelier’s principle, adding heat to a solid and liquid in equilibrium will cause the
A
amount of solid to decrease
B
temperature to rise
C
amount of liquid to decrease
D
temperature to fall
Question 74
The co-ordination number of an atom or ion in solid is the
A
number of coordinate bonds formed with that atom or ion
B
formal charge on that atom or ion
C
number of nearest neighbours of that atom or ion
D
oxidation number of that atom or ion
Question 75
The efficiency of enzyme catalys is due to its capacity to
A
change the shape of the substrate
B
decrease the bond energies in substrate molecules
C
form a strong enzyme-substrate complex
D
form a colloidal solution in water
Question 76
The dimensions of pressure are the same as that of
A
energy
B
force per unit volume
C
energy per unit volume
D
force
Question 77
A mixture of sand and iodine can be separated by
A
Fractional distillation
B
Crystallisation
C
Sublimation
D
Distillation
Question 78
Nuclides
A
Have same number of protons
B
Have specific atomic numbers
C
Have specific atomic number and mass numbers
D
Are isotopes
Question 79
In the below reaction the compound A is 237-chemistry
A
None of these
B
Ethylene bromohydrin
C
Ethanol
D
1, 2-dibromo ethane
There are 79 questions to complete.
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