Que- 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- All
Que- 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- Is non-spontaneous
Que- The environment in which a system is studied is __________________?
a. State function
b. phase
c. surrounding
d. state
Answer- surrounding
Que- Anything which depends upon initial and final state of a system is_______________?
a. environment
b. surrounding
c. state function
d. enthalpy
Answer- state function
Que- Reaction in which heat evolves is called ____________________?
a. endothermic
b. spontaneous
c. non-spontaneous
d. exothermic
Answer- exothermic
Que- Pumping of water uphill is_______________?
a. spontaneous process
b. non-spontaneous process
c. irreversible process
d. reversible process
Answer- non-spontaneous process
Que- Which one of the following is a state function ________________?
a. pressure
b. temperature
c. enthalpy
d. all of the above
Answer- all of the above
Que- Enthalpy of a reaction can be measured by ____________________?
a. glass calorimeter
b. manometer
c. Barometer
d. thermometer
Answer- glass calorimeter
Que- Most of thermodynamic parameters are_________________?
a. system
b. surrounding
c. phase
d. state functions
Answer- state functions
Que- Two fundamental ways to transfer energy are________________?
a. pressure and temperature
b. pressure and volume
c. heat and work
d. heat and volume
Answer- heat and work
Que- Enthalpy change can be_________________?
a. calculated by Hess law
b. can be measured by calorimeter
c. both A and B
d. none
Answer- both A and B
Que- 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- bomb calorimeter
Que- When enthalpy of reactants is higher than product then reaction will be_________________?
a. endothermic
b. spontaneous
c. non-spontaneous
d. exothermic
Answer- exothermic
Que- 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- initial and final state
Que- CuSO4 + Zn?ZnSO4+Cu is___________________?
a. Spontaneous reaction
b. Non-spontaneous reaction
c. Endothermic
d. Exothermic
Answer- Spontaneous reaction
Que- 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- P.E + K.E
Que- Unit of heat in SI system is________________?
a. J
b. KCaL
c. Cal
d. GJ
Answer- J
Que- ________________ is study about energy of a chemical system ?
a. thermochemistry
b. thermodynamics
c. chemical kinetics
d. stoichiometry
Answer- thermochemistry
Que- Which of the following has strongest intermolecular forces of attraction ?
a. Hydrogen (H2)
b. Chlorine (Cl2)
c. lodine (I2)
d. Methane (CH4)
Answer- lodine (I2)
Que- 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- K.E of the molecules decreases
Que- 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- Between 760 torr and 1200 torr
Que- 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- 760 mm Hg
Que- Liquid crystal is discovered by __________________?
a. William Crooks
b. Fredrack Reinitzer
c. J.J Thomson
d. Bravis
Answer- Fredrack Reinitzer
Que- Hydrogen bonding is involved in____________________?
a. Solubility
b. Cleansing action of detergents
c. Biological molecules
d. All
Answer- All
Que- 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- van der Waal
Que- 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- vaporization
Que- Water has maximum density at __________________?
a. 0°C
b. 2°C
c. 4°C
d. 100°C
Answer- 4°C
Que- Formation of vapours from the surface of a liquid is called________________?
a. vapourization
b. evaporation
c. condensation
d. cracking
Answer- evaporation
Que- 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- Dipole-dipole forces
Que- Vapour pressure is not affected by_______________?
a. Surface area
b. temperature
c. intermolecular forces
d. atmospheric pressure
Answer- Surface area
Que- Table salt crystallizes with a______________________?
a. Face centered cubic lattice
b. body centered cubic lattice
c. simple cubic lattice
d. othorhombic lattice
Answer- body centered cubic lattice
Que- During which process empty spaces between particles become minimum ?
a. ionization
b. condensation
c. fusion
d. evaporation
Answer- condensation
Que- Which one of the following has highest volatility_________________?
a. Diethyl ether
b. Ethyl alcohol
c. Water
d. Ethylene glycol
Answer- Diethyl ether
Que- 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- remains constant
Que- A solid may be made up of_________________?
a. Atoms
b. Ions
c. Molecules
d. A, B, and C
Answer- A, B, and C
Que- Amorphous substances posses_________________?
a. No definite geometry
b. No definite heat of fusion
c. No sharp melting points
d. All of the above
Answer- No sharp melting points
Que- 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- More strength of London forces
Que- The phenomenon in which a compound exists in two or more crystalline forms is called ________________?
a. Isomorphism
b. Polymorphism
c. Anisotropy
d. Allotropy
Answer- Polymorphism
Que- Bucky balls is an allotropic from of__________________?
a. Sulphur
b. Carbon
c. Silica
d. Tin
Answer- Carbon
Que- 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- Different physical and chemical properties
Que- The pressure during the molar heat of fusion is kept________________?
a. 0 atmosphere
b. one atmosphere
c. 2 atmosphere
d. 10 atmosphere
Answer- one atmosphere
Que- All the enthalpy changes are________________?
a. Negative
b. Positive
c. May or may not be A or B
d. none
Answer- May or may not be A or B
Que- Which has strongest bonding in the solid state ?
a. Hydrogen Chloride (HCI)
b. Chlorine (Cl2)
c. Xenon(Xe)
d. Sodium Chloride (NaCI)
Answer- Sodium Chloride (NaCI)
Que- 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- ABAB (hexagonal)
Que- Which one is false for evaporation ?
a. Surface phenomenon
b. Continuous
c. Exothermic
d. Cause cooling
Answer- Exothermic
Que- Which one of the following does not show hydrogen bonding?
a. Water
b. Ethyl alcohol
c. Phenol
d. Diethyl ether
Answer- Diethyl ether
Que- Which one is a conductor but is not malleable ?
a. Iron
b. Graphite
c. Silver
d. Platinum
Answer- Graphite
Que- The density of water may be__________________?
a. Equal to that of ice
b. Greater than that of ice
c. Less than that of ice
d. All are possible
Answer- Greater than that of ice
Que- Steam causes more sever burn than the boiling water because it possesses _________________?
a. Latent heat of fusion
b. Latent heat of vaporization
c. Latent heat of sublimation
d. All of the above
Answer- Latent heat of vaporization
Que- The conversion of vapours back into their liquid state is called__________________?
a. crystallization
b. evaporization
c. vaporization
d. condensation
Answer- condensation
Que- When water freezes at 0°C its density decreases due to_______________?
a. Change of bond angles
b. Cubic structure of ice
c. Empty space present in the structure of ice
d. Change of bond length
Answer- Empty space present in the structure of ice
Que- The boiling point increases down the zero group element due to_________________?
a. Ion dipole forces
b. London forces
c. Hydrogen bonding
d. Dipole dipole forces
Answer- London forces
Que- Rising of a wetting liquid in a capillary tube is due to__________________?
a. Surface tension
b. Cohesive forces
c. Adhesive forces
d. viscosity
Answer- Adhesive forces
Que- The number of formula units in 29.25g of common salt_________________?
a. 6.022 x 1023
b. 3.01 x 1023
c. 2 x NA
d. 4 x 6.022 x 1023
Answer- 3.01 x 1023
Que- Liquid gets the shape of the container when it is poured into it. Which one of the following reasons justifies it ?
a. Liquid do not have definite shape
b. Liquid do not have definite volume
c. Lieuid is highly compressible
d. Liquid molecules can slide over each other
Answer- Liquid molecules can slide over each other
Que- Molar heat of vaporization of water is_________________?
a. 40.7 KJ/mole
b. 40.7 J/mole
c. 40.7 cal/mole
d. 40.7 Kcal/mole
Answer- 40.7 KJ/mole
Que- Crystallites are present in_________________?
a. crystalline solids
b. amorphous solids
c. liquid crystals
d. all of the above
Answer- amorphous solids
Que- A malleable solid is one which can be_________________?
a. Converted into wires
b. Converted into thin sheets
c. Melted easily
d. All of the above
Answer- Converted into thin sheets
Que- Crystalline solids can be identified easily from their ___________________?
a. Sharp melting point
b. Definite geometry
c. Transition temperature
d. Colour
Answer- Sharp melting point
Que- The viscosity of solids is________________?
a. Infinite
b. Negligible
c. Medium
d. No concept of viscosity in solid
Answer- Infinite
Que- Which solids are called true solids _______________?
a. Metallic
b. Amorphous
c. Crystalline
d. Vitreous
Answer- Crystalline
Que- The number amino acid units for each turn of helix on average are____________________?
a. 21
b. 23
c. 25
d. 27
Answer- 27
Que- If a physical and chemical change takes place at a constant pressure then the heat change during the process is called__________________?
a. Heat of transition
b. Heat of fusion
c. Enthalpy change
d. All of above
Answer- Enthalpy change
Que- The amount of heat absorbed when one mole of a liquid is changed into gas at its boiling point is_____________________?
a. Molar heat of sublimation
b. Molar heat of fusion
c. Molar heat of vapourization
d. Latent heat of that liquid
Answer- Molar heat of vapourization
Que- All of the following were theorized by Bohr in his description of the atom except__________________?
a. Angular momentum of electrons in multiples of h/2?
b. Electrons revolve in discrete circular orbits
c. Energy of each electron is directly proportional to n2
d. Electrons radiate energy continuously in a given orbit.
Answer- Electrons radiate energy continuously in a given orbit.
Que- The magnetic quantum number (QN) has its values determined directly by the value of_______________?
a. Principal (QN)
b. Azimuthal (QN)
c. Spin (QN)
d. Both A & B
Answer- Azimuthal (QN)
Que- The maximum number of electron in a sub shell with ? = 3fs______________?
a. 6
b. 10
c. 14
d. 18
Answer- 14
Que- When an atom absorbs energy the lines in the spectrum will appear which are_________________?
a. Brighter
b. Darker
c. Colourless
d. Hard to locate
Answer- Darker
Que- Which one is not true about cathode rays ?
a. 9.11×10-31 Kg
b. Cast shadow
c. Heat up the platinum foil
d. Cannot ionize
Answer- Cannot ionize
Que- Rutherfords planet like structure was defective and unsatisfactory because_________________?
a. Moving e- accelerate towards the nucleus
b. Continuous spectrum
c. behavior of electron remain unexplained
d. all
Answer- all
Que- Splitting of spectral lines when atom is subjected to magnetic field is called _______________?
a. Zeemans effect
b. Starks effect
c. Photo electric effect
d. Compton effect
Answer- Zeemans effect
Que- Which one of the following explain the shape of orbitals _________________?
a. Principal of quantum number
b. Azimuthal quantum number
c. Magnetic quantum number
d. Spin quantum number
Answer- Azimuthal quantum number
Que- Pressure in gas discharge tube was kept________________?
a. 10 torr
b. 1 torr
c. 0.1 torr
d. 0.01 torr
Answer- 0.01 torr
Que- Angle of deflection was studied by________________?
a. Hitorff
b. Stoney
c. William Crookes
d. J.Perrin
Answer- J.Perrin
Que- Positive rays give flash on________________?
a. AgNO3 plate
b. AgCl plate
c. ZnO
d. ZnS
Answer- ZnS
Que- The value of e/m ratio of electron is________________?
a. 6.02 x 1023 C/kg
b. 1.7588 x 1020 C/kg
c. 9.1095 x 10-31 C/kg
d. 1.7588 x 1011 C/kg
Answer- 1.7588 x 1011 C/kg
Que- Planks theory says energy is emitted__________________?
a. In continuous manner
b. Discontinuous manner
c. Simultaneously
d. In the form of heat
Answer- Discontinuous manner
Que- 2nd orbit is ___________ away from nucleus of H-atom as compared to 1st orbit is ?
a. 2-times
b. 3-times
c. 4-times
d. 6 times
Answer- 4-times
Que- The correct electronic configuration of Cu is ___________________?
a. [Ar]4s1
b. [Ar]4s2
c. [Ar]3d104s1
d. [Ar]3d94s2
Answer- [Ar]3d104s1
Que- Atomic orbits having same energy are called________________?
a. Degenerate orbitals
b. Bonding molecular orbitals
c. Anti bonding molecular orbitals
d. Half filled orbitals
Answer- Degenerate orbitals
Que- When electrons collide with heavy metals than ___________ are produced?
a. Beta-rays
b. Alpha-rays
c. X-rays
d. Gamma-rays
Answer- X-rays
Que- Atom with higher atomic number produces X-rays of__________________?
a. Shorter wavelength
b. Larger wavelength
c. X-ray not produced
d. All are possible
Answer- Shorter wavelength
Que- Space around nucleus where finding probability of electrons is maximum is called ____________________?
a. Orbital
b. Orbit is elliptical
c. subshell
d. Electron cloud
Answer- Orbital
Que- Electronic configuration of K is_________________?
a. [Ar]4s2
b. [Ar]4s1
c. [Kr]5s1
d. [He]2s1
Answer- [Ar]4s1
Que- Milikan used ______________ in his atomizer?
a. Milk
b. Honey
c. Oil
d. Water
Answer- Oil
Que- Spectrum is produced due to________________?
a. Different wavelength
b. Different colours
c. Different intensities
d. all have little contribution
Answer- Different wavelength
Que- When electron jump into orbit 1 then series obtained is___________________?
a. Lyman
b. Paschen
c. Pfund
d. Brackett
Answer- Lyman
Que- Splitting of spectral lines when atoms are subjected to strong electric filed is called_________________?
a. Zeeman effect
b. Stark effect
c. Photoelectric effect
d. Compton effect
Answer- Stark effect
Que- Three quantum number have been derived from equation of____________________?
a. de-Broglie
b. Plancks
c. Schrodinger
d. Heisenberg
Answer- Schrodinger
Que- The letters s p d and f are used to represent which quantum numbers________________?
a. Principal
b. Azimuthal
c. Magnetic
d. Spin
Answer- Azimuthal
Que- The atomic number of an element having maximum number of unpaired electrons in p-subshell is_______________?
a. 7
b. 10
c. 12
d. 16
Answer- 7
Que- Colour of fluorescene produced by cathode rays depends upon________________?
a. Temperature
b. Pressure
c. Volume
d. Composition of glass
Answer- Composition of glass
Que- Positive rays are produced__________________?
a. By burning of gas
b. By cooling of the gas
c. By the bombardment of cathode rays on gas molecules
d. From anode like cathode rays produced from cathode
Answer- By the bombardment of cathode rays on gas molecules
Que- The relationship between energy of a photon of light and its frequency is given by________________?
a. de-Broglie duel nature of matter
b. Bohrs model
c. Plancks Quantum theory
d. Rutherfords atomic model
Answer- Plancks Quantum theory
Que- The velocity of the photon____________________?
a. Is independent of wavelength
b. Depends upon source
c. Depends upon its frequency
d. Equals to the square of amplitude
Answer- Is independent of wavelength
Que- Atom cannot be divided into simple unitstheorized by________________?
a. Rutherford
b. Dalton
c. Bohr
d. Schrodinger
Answer- Dalton
Que- The number of fundamental particles in an atom of the lightest isotope carbon are_______________?
a. 6
b. 12
c. 18
d. 20
Answer- 18
Que- Increase in atomic number is observed during_________________?
a. Alpha emission
b. Beta emission
c. Both A & B
d. Radioactivity
Answer- Beta emission
Que- Free neutron changes into proton with the emission of__________________?
a. Neutrino
b. Electron
c. Both A & B
d. Meson
Answer- Both A & B
Que- Charge of electron was measured by__________________?
a. J.J Thomson
b. Millikan
c. Rutherford
d. Perrin
Answer- Millikan