Que- Formation of vapours from the surface of a liquid is called
a. vapourization
b. evaporation
c. condensation
d. cracking
Answer- evaporation
Que- When water freezes at 0Degree Centigrade 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 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- 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- Vapour pressure is not affected by
a. Surface area
b. temperature
c. intermolecular forces
d. atmospheric pressure
Answer- Surface area
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- 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- The number of formula units in 29.25g of common salt
a. 022 x 1023
b. 01 x 1023
c. 2 x NA
d. 4 x 6.022 x 1023
Answer- 01 x 1023
Que- During which process empty spaces between particles become minimum?
a. ionization
b. condensation
c. fusion
d. evaporation
Answer- condensation
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- Which one of the following has highest volatility
a. Diethyl ether
b. Ethyl alcohol
c. Water
d. Ethylene glycol
Answer- Diethyl ether
Que- Molar heat of vaporization of water is
a. 7 KJ/mole
b. 7 J/mole
c. 7 cal/mole
d. 7 Kcal/mole
Answer- 7 KJ/mole
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- Crystallites are present in
a. crystalline solids
b. amorphous solids
c. liquid crystals
d. all of the above
Answer- amorphous solids
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- 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- 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- 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- 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- Ice is ___________ crystal
a. Metallic
b. Molecular
c. Covalent
d. Ionic
Answer- Molecular
Que- Select a pair of compounds which are isomorphic in nature.
a. NaCI and KNO3
b. MgO and NaF
c. KNO3 and MgO
d. NaF and CaCO3
Answer- MgO and NaF
Que- The viscosity of solids is
a. Infinite
b. Negligible
c. Medium
d. No concept of viscosity in solid
Answer- Infinite
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- Which solids are called true solids?
a. Metallic
b. Amorphous
c. Crystalline
d. Vitreous
Answer- Crystalline
Que- Bucky balls is an allotropic from of
a. Sulphur
b. Carbon
c. Silica
d. Tin
Answer- Carbon
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- 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- 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 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- 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 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- What is the relative rate of effusion of CO and CO2?
a. CO is 1.25 times faster than CO2
b. CO is 3.75 times faster than CO2
c. CO is 1.25 times faster than CO
d. Both diffuse at the same rate
Answer- CO is 1.25 times faster than CO2
Que- Which of these gases diffuse more quickly than oxygen?
a. H2S
b. NO
c. Cl2
d. N2O
Answer- NO
Que- Which of the following is not considered as an intermolecular force between molecules?
a. Coordinate covalent bonds
b. Hydrogen bonds
c. Debye forces
d. London dispersion forces
Answer- Coordinate covalent bonds
Que- The weakest (in strength) of the following intermolecular forces is
a. Hydrogen bonding
b. Vander Waals force
c. Forces among the polar molecules
d. Ionic bond
Answer- Vander Waals force
Que- Ideal gasses have all the following characteristics except.
a. Absence of intermolecular forces
b. Collisions among the molecules of an ideal gas are perfectly elastic
c. The molecules occupy no space
d. All of the above are correct
Answer- The molecules occupy no space
Que- Which of the following statements is true about plasma
a. It may be the first state of matter
b. It is not a phase transition
c. It is a conductor of electricity
d. All of the above
Answer- All of the above
Que- Under what conditions the gases deviate from the ideal behavior?
a. High temperature
b. Low temperature
c. High pressure
d. b and c
Answer- b and c
Que- Which one has the lowest density at room temperature?
a. Ne
b. N2
c. NH3
d. CO
Answer- NH3
Que- The introduction of Kelvin scale in thermometry is according to
a. Boyles law
b. Charles law
c. Daltons law
d. Grahams law
Answer- Charles law
Que- 5 mole of nitrogen gas and 0.5 mole of carbon monoxide gas at STP have same
a. Value of a
b. Mass
c. Atoms
d. Both b and C
Answer- Both b and C
Que- At constant temperature the pressure of an ideal gas is doubled its density becomes
a. Half
b. Double
c. Same
d. None
Answer- Double
Que- The diffusion of gases at absolute zero will be
a. Unchanged
b. Slightly decreased
c. Slightly increased
d. Zero
Answer- Zero
Que- Which of the following option is incorrect about gases?
a. All molecules move with same speed
b. All molecules behave independently
c. PV / RT = n
d. All gases cannot be liquefied through Linds Method
Answer- All molecules move with same speed
Que- Critical temperature for different gases is different and depends upon
a. Size of molecule
b. Shape of molecule
c. Intermolecular attractions
d. All of the above
Answer- All of the above
Que- In how many forms do matter exists?
a. Three
b. Four
c. Five
d. Two
Answer- Four
Que- What is the simplest form of matter?
a. Gas
b. Liquid
c. Solid
d. Semi solid
Answer- Gas
Que- What is the abundant form of matter on earth?
a. Gas
b. Liquid
c. Solid
d. Plasma
Answer- Solid
Que- Which state of matter has the lowest density?
a. Gas
b. Liquid
c. Solid
d. Plasma
Answer- Gas
Que- What do we call to sudden expansion of plasma?
a. Avogadros law
b. Grahams law of diffusion
c. Joule Thompson effect
d. Daltons law of partial pressure
Answer- Joule Thompson effect
Que- The solid particles only posses
a. Translational motion
b. Vibrational motion
c. Rotational motion
d. All of above motions
Answer- Vibrational motion
Que- For a gas where volume and pressures are 1dm3 and 2 atm respectively what should be its new volume when pressure is increased to 6 atm at constant temperature?
a. 1/2dm3
b. 1/3dm3
c. 1/4dm3
d. 2/3dm3
Answer- 1/3dm3
Que- If 1/V is plotted on X-axis and pressure on Y-axis at constant temperature what should appear
a. Straight line parallel to x-axis
b. Straight line parallel to y-axis
c. Straight line
d. Curve
Answer- Straight line
Que- Which one is the right value for R?
a. 0821 atm dm3k-1mol-
b. 0821 atm m3k-1mol-1
c. 2 cal k-1 mol-1
d. 314 Nm2k-1mol-1
Answer- 0821 atm dm3k-1mol-
Que- One mole of an ideal gas at 546.5 K under 2 atm pressure has a volume of
a. 414 m3
b. 828 dm3
c. 414 dm3
d. 212 cm3
Answer- 414 dm3
Que- The partial pressure exerted by the water vapours is called
a. Surface tension
b. Aqueous tension
c. Vapour pressure
d. Hydraulic pressure
Answer- Aqueous tension
Que- Which one is not the partial pressure of oxygen in the lungs?
a. 1526 atm
b. 116 mm of Hg
c. 116 torr
d. 1 atm
Answer- 1 atm
Que- The spreading of fragrance or scent in air is due to
a. Diffusion
b. Effusion
c. Attraction with air
d. Low dsensity
Answer- Diffusion
Que- The kinetic molecular theory of gases was put forward in 1738 by
a. Boltzman
b. Maxell
c. Clausius
d. Bernoulli
Answer- Bernoulli
Que- The highest temperature at which a substance can exist as a liquid is called its
a. Critical temperature
b. Standard temperature
c. Absolute temperature
d. Upper consulate temperature
Answer- Critical temperature
Que- Hydrogen effuses four times more rapidly than volume of an unknown gas molar mass of unknown gas should be
a. 16 gmol-1
b. 32 gmol-1
c. 48 gmol-1
d. 64 gmol-1
Answer- 32 gmol-1
Que- What will be the pressure of 1 mole of an ideal gas maintained at 300 K and 250cm3 volume?
a. 5 atm
b. 7 atm
c. 8 atm
d. 1 atm
Answer- 5 atm
Que- The processes of effusion and diffusion are best understand by
a. Daltons law
b. Avogadros law
c. Grahams law
d. Charles law
Answer- Grahams law
Que- Who made volume and pressure correction to explain deviation of gases from ideal behaviour?
a. Clausius
b. Boltzman
c. Charles
d. Vander waal
Answer- Vander waal
Que- The non-ideal behaviour results chiefly from
a. Intermolecular attraction and infinite volume
b. Elastic collisions and finite volume
c. Intermolecular attractions and finite volume
d. Intermolecular attraction only
Answer- Intermolecular attractions and finite volume
Que- The gases become non-ideal at
a. High temperature and high pressure
b. Low temperature and low pressure
c. High temperature and low pressure
d. Low temperature and high pressure
Answer- Low temperature and high pressure
Que- Linds method is employed for
a. Separation of gases
b. Expansion of gases
c. Compression of gases
d. Liquefaction of gases
Answer- Liquefaction of gases
Que- The relative attraction of the nucleus for the electrons in a chemical bond is called
a. Ionization energy
b. Electron affinity
c. Electro negativity
d. None of the above
Answer- Electro negativity
Que- The ionization energy
a. Generally increases from left to right in a period
b. Does not change in a period
c. Increase from top to bottom in a group
d. Does not change in a group
Answer- Generally increases from left to right in a period
Que- Which of the following will have highest value of electron affinity
a. F
b. Cl
c. Br
d. I
Answer- Cl
Que- The octet rule does not always hold for which of the following elements
a. "C"
b. "O"
c. "F"
d. "P"
Answer- "P"
Que- Which of the solid does not contain covalent bond
a. Copper
b. Ice
c. Diamond
d. Graphite
Answer- Copper
Que- Which of the following is the best explanation that CO2 is non polar molecule
a. Linear geometry
b. Dipole moment is zero
c. Sp hybridization
d. None
Answer- Dipole moment is zero
Que- Shielding effect across the period
a. Increases
b. Decreases
c. Constant
d. None
Answer- Constant
Que- Which one is not the absolute term of the element?
a. Ionization energy
b. Electron affinity
c. Electro negativity
d. Atomic size
Answer- Electro negativity
Que- Which one has maximum number of unpaired electrons?
a. 6X
b. 7Y
c. 9Z
d. 13W
Answer- 7Y
Que- In O2 each oxygen atom is hybridized
a. sp3
b. sp2
c. sp
d. All
Answer- sp2
Que- Molecular orbitals are filled according to
a. Auf bau principle
b. Hunds rule
c. Paulis Exclusion principle
d. All these
Answer- All these
Que- Measurement of the degree of polarity is
a. Electron affinity
b. Ionic character
c. Ionization energy
d. Dipole moment
Answer- Dipole moment
Que- Which one shows high %age of the ionic character?
a. H2O
b. HF
c. HCI
d. HBr
Answer- HF
Que- A specie with maximum number of unpaired electrons.
a. F
b. H2O
c. HF
d. NH-2
Answer- NH-2
Que- Which of the following have their outer most shell complete in atomic form?
a. Noble gases
b. Alkali metals
c. Coinage metals
d. Gun metals
Answer- Noble gases
Que- Force responsible to hold atoms together in a compound is called
a. Bond
b. Attractive force
c. Interaction
d. All of above represent same entity
Answer- Bond
Que- Energy of atom in compound is
a. Higher than individual
b. Lesser than individual
c. No change
d. Impossible to predict
Answer- Lesser than individual
Que- In a period the atomic radii
a. Increases
b. Decreases
c. Remain same
d. First decreases then increases
Answer- Decreases
Que- An atom loses or gains electrons to
a. Gain stability
b. Form a bond
c. Complete its outermost shell
d. all are accurate justifications
Answer- all are accurate justifications
Que- In a group ionic radii
a. Increases
b. Decreases
c. No change
d. Variable trend
Answer- Increases
Que- Energy required to remove electron from an atom
a. Ionization potential
b. Electronegativity
c. Electron affinity
d. Activation energy
Answer- Ionization potential
Que- Ionization energy in a period generally
a. Increases
b. Decreases
c. No change
d. Variable trend
Answer- Increases
Que- Greater shielding effect corresponds to ionization energy value
a. Greater
b. Lesser
c. Remain same
d. No effect
Answer- Lesser
Que- Elements having high I.P values are
a. Metals
b. Non metals
c. Liquids
d. Solids
Answer- Non metals
Que- Energy released or absorbed when electrons are added in atom is
a. Ionization potential
b. Electronegativity
c. Electron affinity
d. Activation energy
Answer- Electron affinity
Que- In a period electronegativity from left to right
a. Increases
b. Decreases
c. Remain constant
d. Variable trend
Answer- Increases
Que- Ionic bond is produced after complete transfer of
a. Nucleus
b. Neutrons
c. Electrons
d. Protons
Answer- Electrons
Que- Elements of group IA IIA are
a. Electronegative
b. Electropositive
c. Neutral
d. IA is electropositive while IIA is electronegative
Answer- Electropositive
Que- Bond will beionic when E.N difference of bonded atom is
a. Equal to 1.7
b. Greater than 1.7
c. Less than 1.7
d. No specificity exists
Answer- Greater than 1.7
Que- Mostly ionic compound are produced in between elements of
a. IA and VIA
b. IA IIA and VIIA
c. IB and VIIB
d. IA and IB
Answer- IA IIA and VIIA
Que- Which one of the following has polar covalent bond?
a. HF
b. CH4
c. H2
d. N2
Answer- HF
Que- The Lewis acids are
a. Electron deficient
b. Electron rich
c. Octet is complete
d. No such acids exist
Answer- Electron deficient
Que- Sharing of 1 electron pair by one specie forms
a. Single covalent bond
b. Hydrogen bond
c. Double covalent bond
d. Coordinate covalent bond
Answer- Coordinate covalent bond