Basic Chemistry Mcqs - Set 5

1)   In sp3 hybridization the expected geometry of molecules will be__________________?

a. square planar
b. trigonal pyramidal
c. tetrahedral
d. linear
Answer  Explanation 

ANSWER: tetrahedral

Explanation:
No explanation is available for this question!


2)   In cyano group the carbon atom shows which kind of hybridization___________________?

a. sp2
b. sp
c. sp3
d. none of the above
Answer  Explanation 

ANSWER: sp

Explanation:
No explanation is available for this question!


3)   the fractional distillation of petroleum produces gasoline up to ________________?

a. 10%
b. 15%
c. 20%
d. 30%
Answer  Explanation 

ANSWER: 20%

Explanation:
No explanation is available for this question!


4)   Which is not heterocyclic compound _______________?

a. Furan
b. Thiophene
c. Aniline
d. Pyridine
Answer  Explanation 

ANSWER: Aniline

Explanation:
No explanation is available for this question!


5)   Which one is not state function ________________?

a. Internal energy
b. Enthalpy
c. Gibbs free energy
d. Work
Answer  Explanation 

ANSWER: Work

Explanation:
No explanation is available for this question!


6)   If internal energy of the system is increased ____________________?

a. Change in state of the system is increased
b. Temperature of the ystem may rise
c. Chemical reaction may take place
d. All
Answer  Explanation 

ANSWER: All

Explanation:
No explanation is available for this question!


7)   A reaction has values of ?H and ?S which are both positive. The reaction __________________?

a. Is spontaneous
b. Spontaneity is temperature dependent
c. Has an increasing free energy
d. Is non-spontaneous
Answer  Explanation 

ANSWER: Is non-spontaneous

Explanation:
No explanation is available for this question!


8)   The environment in which a system is studied is __________________?

a. State function
b. phase
c. surrounding
d. state
Answer  Explanation 

ANSWER: surrounding

Explanation:
No explanation is available for this question!


9)   Anything which depends upon initial and final state of a system is_______________?

a. environment
b. surrounding
c. state function
d. enthalpy
Answer  Explanation 

ANSWER: state function

Explanation:
No explanation is available for this question!


10)   Reaction in which heat evolves is called ____________________?

a. endothermic
b. spontaneous
c. non-spontaneous
d. exothermic
Answer  Explanation 

ANSWER: exothermic

Explanation:
No explanation is available for this question!


11)   Pumping of water uphill is_______________?

a. spontaneous process
b. non-spontaneous process
c. irreversible process
d. reversible process
Answer  Explanation 

ANSWER: non-spontaneous process

Explanation:
No explanation is available for this question!


12)   Which one of the following is a state function ________________?

a. pressure
b. temperature
c. enthalpy
d. all of the above
Answer  Explanation 

ANSWER: all of the above

Explanation:
No explanation is available for this question!


13)   Enthalpy of a reaction can be measured by ____________________?

a. glass calorimeter
b. manometer
c. Barometer
d. thermometer
Answer  Explanation 

ANSWER: glass calorimeter

Explanation:
No explanation is available for this question!


14)   Most of thermodynamic parameters are_________________?

a. system
b. surrounding
c. phase
d. state functions
Answer  Explanation 

ANSWER: state functions

Explanation:
No explanation is available for this question!


15)   Two fundamental ways to transfer energy are________________?

a. pressure and temperature
b. pressure and volume
c. heat and work
d. heat and volume
Answer  Explanation 

ANSWER: heat and work

Explanation:
No explanation is available for this question!


16)   Enthalpy change can be_________________?

a. calculated by Hess law
b. can be measured by calorimeter
c. both A and B
d. none
Answer  Explanation 

ANSWER: both A and B

Explanation:
No explanation is available for this question!


17)   Enthalpy of combustion for food fuel and other compounds can be measured accurately by________________?

a. glass calorimeter
b. bomb calorimeter
c. thermometer
d. manometer
Answer  Explanation 

ANSWER: bomb calorimeter

Explanation:
No explanation is available for this question!


18)   When enthalpy of reactants is higher than product then reaction will be_________________?

a. endothermic
b. spontaneous
c. non-spontaneous
d. exothermic
Answer  Explanation 

ANSWER: exothermic

Explanation:
No explanation is available for this question!


19)   State function the macroscopic property of system depends upon________________?

a. path of reaction
b. initial state
c. final state
d. initial and final state
Answer  Explanation 

ANSWER: initial and final state

Explanation:
No explanation is available for this question!


20)   CuSO4 + Zn?ZnSO4+Cu is___________________?

a. Spontaneous reaction
b. Non-spontaneous reaction
c. Endothermic
d. Exothermic
Answer  Explanation 

ANSWER: Spontaneous reaction

Explanation:
No explanation is available for this question!


21)   Total energy of a system is_________________?

a. P.E + K.E
b. P.E + heat energy
c. K.E + heat energy
d. P.E + mechanical energy
Answer  Explanation 

ANSWER: P.E + K.E

Explanation:
No explanation is available for this question!


22)   Unit of heat in SI system is________________?

a. J
b. KCaL
c. Cal
d. GJ
Answer  Explanation 

ANSWER: J

Explanation:
No explanation is available for this question!


23)   ________________ is study about energy of a chemical system ?

a. thermochemistry
b. thermodynamics
c. chemical kinetics
d. stoichiometry
Answer  Explanation 

ANSWER: thermochemistry

Explanation:
No explanation is available for this question!


24)   Which of the following has strongest intermolecular forces of attraction ?

a. Hydrogen (H2)
b. Chlorine (Cl2)
c. lodine (I2)
d. Methane (CH4)
Answer  Explanation 

ANSWER: lodine (I2)

Explanation:
No explanation is available for this question!


25)   When substance moves from a solid to a liquid state all of the following changes occur except__________________?

a. Molecules become more disordered
b. K.E of the molecules decreases
c. Intermolecular forces become weaker
d. Molecule become further separated
Answer  Explanation 

ANSWER: K.E of the molecules decreases

Explanation:
No explanation is available for this question!


26)   In order to mention the boiling point of water at 110°C the external pressure should be ?

a. Between 760 torr and 1200 torr
b. Between 200 torr and 760 torr
c. 765 torr
d. any value of pressure
Answer  Explanation 

ANSWER: Between 760 torr and 1200 torr

Explanation:
No explanation is available for this question!


27)   Vapour pressure of water at 100°C is___________________?

a. 55 mm Hg
b. 760 mm Hg
c. 355 mm Hg
d. 1489 mm Hg
Answer  Explanation 

ANSWER: 760 mm Hg

Explanation:
No explanation is available for this question!


28)   Liquid crystal is discovered by __________________?

a. William Crooks
b. Fredrack Reinitzer
c. J.J Thomson
d. Bravis
Answer  Explanation 

ANSWER: Fredrack Reinitzer

Explanation:
No explanation is available for this question!


29)   Hydrogen bonding is involved in____________________?

a. Solubility
b. Cleansing action of detergents
c. Biological molecules
d. All
Answer  Explanation 

ANSWER: All

Explanation:
No explanation is available for this question!


30)   Forces of attraction which may be present between all kinds of atoms and molecules are _____________________?

a. intramolecular
b. intermolecular
c. van der Waal
d. Dipole-induced dipole
Answer  Explanation 

ANSWER: van der Waal

Explanation:
No explanation is available for this question!


31)   The quantity of heat required to convert one mole of liquid into its vapours at its boiling point is called molar heat of__________________?

a. vaporization
b. evaporation
c. crystallization
d. sublimation
Answer  Explanation 

ANSWER: vaporization

Explanation:
No explanation is available for this question!


32)   Water has maximum density at __________________?

a. 0°C
b. 2°C
c. 4°C
d. 100°C
Answer  Explanation 

ANSWER: 4°C

Explanation:
No explanation is available for this question!


33)   Formation of vapours from the surface of a liquid is called________________?

a. vapourization
b. evaporation
c. condensation
d. cracking
Answer  Explanation 

ANSWER: evaporation

Explanation:
No explanation is available for this question!


34)   The ttractive forces between the partial positive end of one molecule and partial negative end of other molecule are called________________?

a. Dipole-dipole forces
b. Ion dipole-dipole forces
c. London dispersion forces
d. Debye forces
Answer  Explanation 

ANSWER: Dipole-dipole forces

Explanation:
No explanation is available for this question!


35)   Vapour pressure is not affected by_______________?

a. Surface area
b. temperature
c. intermolecular forces
d. atmospheric pressure
Answer  Explanation 

ANSWER: Surface area

Explanation:
No explanation is available for this question!


36)   Table salt crystallizes with a______________________?

a. Face centered cubic lattice
b. body centered cubic lattice
c. simple cubic lattice
d. othorhombic lattice
Answer  Explanation 

ANSWER: body centered cubic lattice

Explanation:
No explanation is available for this question!


37)   During which process empty spaces between particles become minimum ?

a. ionization
b. condensation
c. fusion
d. evaporation
Answer  Explanation 

ANSWER: condensation

Explanation:
No explanation is available for this question!


38)   Which one of the following has highest volatility_________________?

a. Diethyl ether
b. Ethyl alcohol
c. Water
d. Ethylene glycol
Answer  Explanation 

ANSWER: Diethyl ether

Explanation:
No explanation is available for this question!


39)   If we provide very high amount of heat to a liquid its boiling point will__________________?

a. increase
b. remains constant
c. decrease
d. there will be no boiling
Answer  Explanation 

ANSWER: remains constant

Explanation:
No explanation is available for this question!


40)   A solid may be made up of_________________?

a. Atoms
b. Ions
c. Molecules
d. A, B, and C
Answer  Explanation 

ANSWER: A, B, and C

Explanation:
No explanation is available for this question!


41)   Amorphous substances posses_________________?

a. No definite geometry
b. No definite heat of fusion
c. No sharp melting points
d. All of the above
Answer  Explanation 

ANSWER: No sharp melting points

Explanation:
No explanation is available for this question!


42)   Boiling points of hydrocarbons increase with the increase in number of carbon atoms. It is mainly due to_________________?

a. More strength of H-bonding
b. More strength of London forces
c. Less polarizability
d. All of the above
Answer  Explanation 

ANSWER: More strength of London forces

Explanation:
No explanation is available for this question!


43)   The phenomenon in which a compound exists in two or more crystalline forms is called ________________?

a. Isomorphism
b. Polymorphism
c. Anisotropy
d. Allotropy
Answer  Explanation 

ANSWER: Polymorphism

Explanation:
No explanation is available for this question!


44)   Bucky balls is an allotropic from of__________________?

a. Sulphur
b. Carbon
c. Silica
d. Tin
Answer  Explanation 

ANSWER: Carbon

Explanation:
No explanation is available for this question!


45)   Isomorphic substances have _______________?

a. Same physical and chemical properties
b. Same physical and different chemical properties
c. Different physical and same chemical properties
d. Different physical and chemical properties
Answer  Explanation 

ANSWER: Different physical and chemical properties

Explanation:
No explanation is available for this question!


46)   The pressure during the molar heat of fusion is kept________________?

a. 0 atmosphere
b. one atmosphere
c. 2 atmosphere
d. 10 atmosphere
Answer  Explanation 

ANSWER: one atmosphere

Explanation:
No explanation is available for this question!


47)   All the enthalpy changes are________________?

a. Negative
b. Positive
c. May or may not be A or B
d. none
Answer  Explanation 

ANSWER: May or may not be A or B

Explanation:
No explanation is available for this question!


48)   Which has strongest bonding in the solid state ?

a. Hydrogen Chloride (HCI)
b. Chlorine (Cl2)
c. Xenon(Xe)
d. Sodium Chloride (NaCI)
Answer  Explanation 

ANSWER: Sodium Chloride (NaCI)

Explanation:
No explanation is available for this question!


49)   When the atoms of third layer are arranged in such a way that they directly lie above the atoms of first layer then this arrangement is called_________________?

a. ABAB (hexagonal)
b. ABCABC (Cubic)
c. Orthor hombic
d. Rhombohedral
Answer  Explanation 

ANSWER: ABAB (hexagonal)

Explanation:
No explanation is available for this question!


50)   Which one is false for evaporation ?

a. Surface phenomenon
b. Continuous
c. Exothermic
d. Cause cooling
Answer  Explanation 

ANSWER: Exothermic

Explanation:
No explanation is available for this question!