Test: Chemistry Mock Test - 5 | 45 Questions MCQ Test NEET Mock Test Series NEET

QUESTION: 1

The IUPAC name of (C₂H₅)₄C is

A.
Tetra ethyl methane
B.
2,2-dimethyl pentane
C.
3,3-diethyl pentane
D.
Neopentane

Solution:

QUESTION: 2

Which of the following sulphides is yellow?

A.
ZnS
B.
CdS
C.
NiS
D.
PbS

Solution:

QUESTION: 3

Benzene reacts with CH₃Cl in the presence of anhydrous AlCl₃ to form:

A.
Chlorobenzene
B.
Benzylchloride
C.
Xylene
D.
Toluene

Solution:

QUESTION: 4

The value of the energy for the first excited state of hydrogen will be

A.
-13.6 eV
B.
-3.40 eV
C.
-1.51 eV
D.
-0.85 eV

Solution:

QUESTION: 5

The ratio of the molar amounts of H₂S needed to precipitate the metal ions from 20 mL each of 1M Cd(NO₃)₂ and 0.5 M CuSO₄ is

A.
1 : 1
B.
2 : 1
C.
1 : 2
D.
Indefinite

Solution: As Cd²⁺ and Cu²⁺, both are dipositive ions but Cu²⁺ has one half of the concentration compared to that of the Cd²⁺. Thus, the molar amount of the H₂S used to precipitate the metals ions Cd²⁺ and Cu²⁺ is 2 : 1.

QUESTION: 6

On heating with conc. HNO₃, proteins give yellow colour. This test is called

A.
Oxidising test
B.
Xanthoproteic test
C.
Hoppe's test
D.
Acid base test

Solution:

QUESTION: 7

Lattice energy of an ionic compound depends upon

A.
Charge on the ions only
B.
Size of the ions only
C.
Packing of ions only
D.
Charge on the ion and size of the ion

Solution:

QUESTION: 8

The work done during expansion of a gas from a volume of 4 dm³ to 6 dm³ against a constant external pressure of 3 atm (1 L-atm = 101.32 J)

A.
-6 J
B.
-608 J
C.
+304 J
D.
-304 J

Solution:

QUESTION: 9

In which of the following case,does the reaction go farthest completion ?

A.
K = 10³
B.
K = 10
C.
K = 10⁻²
D.
K = 1

Solution:

∵ higher the equilibrium constant , fastest the rate of reaction to completion.
for understanding this concept let see one example .
A + B ⇄ C + D
Equilibrium constant , K = [C][D]/[A][B]
For fastest completion of reaction numerator of RHS will be higher the denominator . Means higher the numberator , higher will be equilibrium constant and higher will be rate of reaction to completion.

QUESTION: 10

The order of reaction is decided by

A.
temperature
B.
mechanism of reaction as well as relative concentration of reactants
C.
molecularity
D.
pressure

Solution:

QUESTION: 11

Variation of heat of reaction with temperature is known as

A.
Vant Hoff's isotherm
B.
Vant Hoff's isochore
C.
Kirchoff's equation
D.
Kemmerling equation

Solution:

QUESTION: 12

A good example of an auxin herbicide is

A.
IAA
B.
NAA
C.
2,4-D
D.
IBA

Solution:

QUESTION: 13

Which is stable carbanion?

A.
p-NO₂C₆H₄CH₂
B.
p-OCH₃-C₆H₄CH₂
C.
p-CH₃-C₆H₄CH₂
D.

Solution:

QUESTION: 14

The atomic radius of elements of which of these would be nearly same

A.
Na, K, Rb, Cs
B.
Li, Be, B, C
C.
Fe, Co, Ni, Cu
D.
F, Cl, Br, I

Solution: The atomic radii of the d- block elements of a given series decrease with increase in atomic number but this decrease becomes small after midway. The decrease in atomic radii in the beginning, is due to an increase in nuclear charge from member to member which tends to reduce the size. At the same time, the addition of extra electrons to (n-1)d orbitals also provides the screening effect. As the number of d-electrons increases, the screening effect increases. Thus, there are operating two effects namely screening effect and nuclear charge effect which oppose each other. In the midway onwards of the series both these effects become nearly equal and thus, there is no change in atomic radii inspite of the fact that atomic number increases gradually.

QUESTION: 15

K₄[Fe(CN)₆] is a

A.
alum
B.
double salt
C.
mixed salt
D.
complex compound

Solution:

QUESTION: 16

Which of the following transition metal has the highest melting point?

A.
W
B.
Ta
C.
Os
D.
Ir

Solution:

QUESTION: 17

The element, which forms oxides in all oxidation states + 1 to + 5, is

A.
N
B.
P
C.
As
D.
Sb

Solution:

QUESTION: 18

An example of an oxide ore is

A.
Bauxite
B.
Malachite
C.
Zinc blende
D.
Feldspar

Solution:

QUESTION: 19

If 0.44 g of a colourless oxide of nitrogen occupies 224 ml at 1520 mm hg and 273^oC, then the compound is

A.
NO₂
B.
N₂O
C.
N₂O₂
D.
N₂O₅

Solution:

QUESTION: 20

Which one of the following metallic hydroxides does not dissolve in sodium hydroxide solution?

A.
Al(OH)₃
B.
Pb(OH)₂
C.
Fe(OH)₃
D.
Zn(OH)₂

Solution:

QUESTION: 21

Which of the following is not a Lewis acid?

A.
SiF₄
B.
FeCl₃
C.
BF₃
D.
C₂H₄

Solution:

QUESTION: 22

White lead is

A.
Basic lead acetate
B.
Acidic lead carbonate
C.
Basic lead carbonate
D.
Basic lead hydroxide

Solution:

QUESTION: 23

With respect to protonic acids, which of the following statements is correct?

A.
PH₃ is more basic than NH₃
B.
PH₃ is less basic than NH₃
C.
PH₃ is equally basic than NH₃
D.
PH₃ is amphoteric while NH₃ is basic

Solution:

QUESTION: 24

Aqueous solution of hydrogen sulphide and sulphur dioxide when mixed together ,yield

A.
Sulphur and Water
B.
Hydrogen peroxide and sulphur
C.
Sulphur trioxide and water
D.
Hydrogen and sulphurous acid

Solution:

QUESTION: 25

Iodine readily dissolves in potassium iodide solution giving

A.
I⁻
B.
KI₂
C.
KI⁻
D.
KI₃

Solution:

QUESTION: 26

Epsom salt is

A.
MgSO₄.7H₂O
B.
CaSO₄.H₂O
C.
MgSO₄.2H₂O
D.
BaSO₄.2H₂O

Solution:

QUESTION: 27

The test used for identifying carbon-carbon double bond in an alkene

A.
Baeyer's
B.
Carbylamine
C.
Lassaigne
D.
Silver mirror

Solution:

QUESTION: 28

Which one of the following processes will produce hard water ?

A.
Saturation of water with MgCO₃
B.
Saturation of water with CaSO₄
C.
Addition of Na₂SO₄ to water
D.
Saturation of water with CaCO₃

Solution:

QUESTION: 29

Ammonium ion is

A.
a conjugate acid
B.
a conjugate base
C.
neither an acid nor a base
D.
both an acid and a base

Solution:

QUESTION: 30

A molecule is said to be chiral if it

A.
cannot be superimposed on its mirror image
B.
contains a plane of symmetry
C.
exists as cis and trans isomers
D.
fulfil all the above requirements

Solution:

QUESTION: 31

The correct structure of 4-bromo-3-methyl-but-1-ene

A.
BrCH = C (CH₃)₂
B.
CH₂=CH-CH(CH₃)-CH₂Br
C.
CH₂ = C(CH₃) CH₂CH₂Br
D.
CH₃C (CH₃) = CH - CH₂Br

Solution:

QUESTION: 32

Hydrolysis of trichloromethane with aqueous KOH gives

A.
Potassium formate
B.
Acetylene
C.
Chloral
D.
Methanol

Solution:

QUESTION: 33

The main product in the above reaction is

A.
B.
C.
D.

Solution:

QUESTION: 34

A.
conc. H₂SO₄
B.
Fe
C.
FeBr₃
D.
AlCl₃

Solution:

QUESTION: 35

The type of isomerism exhibited by pentamminenitro chromium (III) chloride is

A.
Optical
B.
Linkage
C.
Geometrical
D.
Polymerization

Solution:

QUESTION: 36

An example of a natural biopolymer is

A.
teflon
B.
rubber
C.
nylon-66
D.
DNA

Solution:

QUESTION: 37

Which of the following compounds to does not show Lassaigne's test for nitrogen?

A.
Urea
B.
Hydrazine
C.
Phenylhydrazine
D.
Azobenzene

Solution:

QUESTION: 38

Modern Periodic Table is based on atomic no. of elements. The significance of atomic no. was proved by the experiment of

A.
discovery of X-rays by Roentgen
B.
Mulliken's oil drop experiment
C.
Bragg's work on X-ray diffraction
D.
Moseley's work on X-ray spectra

Solution: Moseley in 1912 measured the frequencies of X-rays emitted by a metal when bombarded with high speed electrons. He discovered that the square root of the frequency of the more prominent X-rays emitted by a metal was proportional to the atomic number and not the atomic weight of the atom of the metal. He thus concluded that atomic number was a more fundamental property of an element than its atomic weight. This forms tha basis of the modern periodic law.

QUESTION: 39

Which of the following is not a redox reaction?

A.
CaCO₃ → CaO + CO₂
B.
O₂ + 2H₂ → 2H₂O
C.
Na + H₂O → NaOH + 1/2H₂
D.
MnCl₃ → MnCl₂ + 1/2Cl₂

Solution:

QUESTION: 40

Ionic solids with Schottky defects contain in their structure

A.
equal number of cation and anion vacancies
B.
interstitial anions and anion vacancies
C.
cation vacancies only
D.
cation vacancies and interstitial cations

Solution:

QUESTION: 41

The vapour pressure of two liquids P ans Q are 80 and 60 torr, respectively. The total vapour pressure of solution obtained by mixing 3 moles of P and 2 moles of Q would be

A.
20 torr
B.
68 torr
C.
72 torr
D.
140 torr

Solution:

QUESTION: 42

Which of the following compounds exhibit cis and trans forms?

A.
2- Butyne
B.
2- Butene
C.
2- Butanol
D.
Butanol

Solution:

QUESTION: 43

720g of water contains how many moles of water?

A.
20
B.
40
C.
60
D.
80

Solution:

QUESTION: 44

Which of the following is less than zero during adsorption?

A.
∆G
B.
∆S
C.
∆H
D.
All the above

Solution:

QUESTION: 45

Colourless solutions of the following four salts are placed separately in four different test tubes and a strip of copper is dipped in each one of these. Which solution will turn blue ?

A.
KNO₃
B.
AgNO₃
C.
Zn(NO₃)₂
D.
ZnSO₄

Solution:

Test: Chemistry Mock Test - 5

45 Questions MCQ Test NEET Mock Test Series | Test: Chemistry Mock Test - 5

The IUPAC name of (C2H5)4C is

Tetra ethyl methane

2,2-dimethyl pentane

3,3-diethyl pentane

Neopentane

Which of the following sulphides is yellow?

ZnS

CdS

NiS

PbS

Benzene reacts with CH3Cl in the presence of anhydrous AlCl3 to form:

Chlorobenzene

Benzylchloride

Xylene

Toluene

-13.6 eV

-3.40 eV

-1.51 eV

-0.85 eV

1 : 1

2 : 1

1 : 2

Indefinite

Oxidising test

Xanthoproteic test

Hoppe's test

Acid base test

Charge on the ions only

Size of the ions only

Packing of ions only

Charge on the ion and size of the ion

temperature

mechanism of reaction as well as relative concentration of reactants

molecularity

pressure

Vant Hoff's isotherm

Vant Hoff's isochore

Kirchoff's equation

Kemmerling equation

IAA

NAA

2,4-D

IBA

Na, K, Rb, Cs

Li, Be, B, C

Fe, Co, Ni, Cu

F, Cl, Br, I

alum

double salt

mixed salt

complex compound

W

Ta

Os

Ir

N

P

As

Sb

Bauxite

Malachite

Zinc blende

Feldspar

Al(OH)₃

Pb(OH)₂

Fe(OH)₃

Zn(OH)₂

SiF₄

FeCl₃

BF₃

C₂H₄

Basic lead acetate

Acidic lead carbonate

Basic lead carbonate

Basic lead hydroxide

PH₃ is more basic than NH₃

PH₃ is less basic than NH₃

PH₃ is equally basic than NH₃

The IUPAC name of (C₂H₅)₄C is

Benzene reacts with CH₃Cl in the presence of anhydrous AlCl₃ to form:

BrCH = C (CH₃)₂

CH₂=CH-CH(CH₃)-CH₂Br

CH₂ = C(CH₃) CH₂CH₂Br

CH₃C (CH₃) = CH - CH₂Br