Que- The kinetic molecular theory of gases was put forward in 1738 by _____________________?
a. Boltzman
b. Maxell
c. Clausius
d. Bernoulli
Answer- Bernoulli
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- 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- 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- 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- Which of these gases diffuse more quickly than oxygen ?
a. H2S
b. NO
c. Cl2
d. N2O
Answer- NO
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- 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- 0.5 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- 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- In how many forms do matter exists ?
a. Three
b. Four
c. Five
d. Two
Answer- Four
Que- What is the abundant form of matter on earth ?
a. Gas
b. Liquid
c. Solid
d. Plasma
Answer- Solid
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- Which one is the right value for R ?
a. 0.0821 atm dm3k-1mol-
b. 0.0821 atm m3k-1mol-1
c. 2 cal k-1 mol-1
d. 8.314 Nm2k-1mol-1
Answer- 0.0821 atm dm3k-1mol-
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- 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 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- 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- What will be the pressure of 1 mole of an ideal gas maintained at 300 K and 250cm3 volume ?
a. 98.5 atm
b. 96.7 atm
c. 95.8 atm
d. 97.1 atm
Answer- 98.5 atm
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 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- The pH of 10-3 mol dm-3 of an aqueous solution of H2SO4 is_________________?
a. 3
b. 2.7
c. 2
d. 1.5
Answer- 2.7
Que- If a buffer solution of higher pH than seven is to be made we use___________________?
a. Strong acid and strong base
b. Weak acid and strong base
c. Weak acid and strong base
d. Weak acid and its salt with strong base
Answer- Weak acid and its salt with strong base
Que- AgCl dissolved with conc (2×10-2) Ksp will be__________________?
a. 3.6 x 10-6
b. 3.6 x 10-5
c. 7.2 x 10-6
d. 4 x 10-4
Answer- 4 x 10-4
Que- Which of the following will not change the concentration of ammonia at the equilibrium ?
a. Increase of pressure
b. Increase of volume
c. Addition of catalyst
d. Decrease of temperature
Answer- Addition of catalyst
Que- For a reaction involving only gases at 25?C the equilibrium constant can be expressed in terms of molarity Ke or partial pressure Kp. Which is true about the numerical value of Kp ?
a. Kc is generally greaer than Kp
b. Kc is generally less than Kp
c. Kc is generally equal to Kp
d. Kc is equal to Kp if the total moles of reactants and products are equal
Answer- Kc is equal to Kp if the total moles of reactants and products are equal
Que- Which one of the following aqueous solutions will be basic ?
a. NaCI
b. Na2SO4
c. Na2CO3
d. FeCl3
Answer- Na2CO3
Que- Reaction which proceeds in both directions is called_______________?
a. reversible
b. irreversible
c. spontaneous
d. non-spontaneous
Answer- reversible
Que- Conversion of reactant into product in unit time is called________________?
a. rate of forward reaction
b. rate of backward reaction
c. rate constant
d. rate co-efficient
Answer- rate of forward reaction
Que- Unit of Kc is_______________?
a. moles2dm+6
b. moles-2dm+6
c. moles+2dm-6
d. Kc may or may not have units
Answer- Kc may or may not have units
Que- Rate expression for ammonia synthesis is___________________?
a. Kc=x2/(a-x)(b-x)
b. Kc=x2/v(a-x)
c. Kc=4×2/(a-2x)2(b-x)
d. Kc=4x2v2/(a-x)(b-3x)3
Answer- Kc=4x2v2/(a-x)(b-3x)3
Que- Catalyst used to speed up the reaction of ammonia synthesis is________________________?
a. V2O5
b. V2O5 and Pt
c. Fe
d. Pieces of Fe crystals are embedded in fused mixture of MgO Al2O3 and SiO2
Answer- Pieces of Fe crystals are embedded in fused mixture of MgO Al2O3 and SiO2
Que- By the addition of base in waterpH will be_______________?
a. more than 7
b. less than 7
c. equal to 7
d. no effect
Answer- more than 7
Que- Negative log of mular concentration of H+ ions is called___________________?
a. pH
b. pOH
c. pKa
d. pKw
Answer- pH
Que- Any substance which accepts H+ is base favours the concept___________________?
a. Lowrys
b. Lewis
c. Arrhenius
d. None of these
Answer- Lowrys
Que- When sparingly soluble salt is in equilibrium with molar concentration of its oppositely charged ion when the product is called_________________?
a. common ion effect
b. solubility product
c. dissociation constant
d. dissociation constant for an acid
Answer- solubility product
Que- Addition of CH3COOH and CH3COONa gives in water_______________?
a. Standard solution
b. buffer solution
c. acidic buffer solution
d. both B & C
Answer- both B & C
Que- Solubility of any salt can be determined from_______________?
a. Ka
b. Kb
c. Kc
d. Ksp
Answer- Ksp
Que- By decreasing the pressure the reaction will go to that direction where_________________?
a. volume is decreased
b. volume increased
c. heat absorbed
d. no. of moles of specie decreased
Answer- volume increased
Que- Equilibrium state is achieved quickly by the addition of ________________?
a. reactants
b. acid
c. base
d. catalyst
Answer- catalyst
Que- Which one of the following is a buffer solution ?
a. brine
b. blood
c. glue
d. solution of CuSO4
Answer- blood
Que- Solution having the property of a very little change in pH on adding a small amount of strong acid or base is called________________?
a. buffer solution
b. normal solution
c. standard solution
d. neutral solution
Answer- buffer solution
Que- Conjugated base of a weak acid is_________________?
a. weak
b. strong
c. moderately weak
d. unstable
Answer- strong
Que- Kc value has_______________?
a. No units
b. Units
c. Both A & B
d. None
Answer- Both A & B
Que- Sodium benzoate and benzoic acid are mixed in equimolar ration to form buffer if pKa is 2 what will be the pH ?
a. 0
b. 1
c. 2
d. any one
Answer- 2
Que- In which of the following equilibria will Kc and Kp have the same value ?
a. PCI5 = PCI3 + Cl2
b. N2 + 3H2 = 2NH
c. 2CO + O2 = CO2
d. N2 + O2 = 2NO
Answer- N2 + O2 = 2NO
Que- Which of following is not a base______________?
a. KOH
b. NH3
c. PH3
d. BF3
Answer- BF3
Que- Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution ?
a. 0.0002M HCI
b. 0.2 mole of NaCI with 0.2 mole of HNO3
c. 0.4 mole of CH3COOH with 0.4 mole of NaOH
d. 0.4 mole of NH3 with 0.2 mole of HCI
Answer- 0.4 mole of NH3 with 0.2 mole of HCI
Que- Chemical equilibrium state is_______________?
a. dynamic state
b. static state
c. free state
d. unidirectional state
Answer- dynamic state
Que- At start of reaction the concentration of reactants is_______________?
a. high
b. low
c. according to Kc
d. constant
Answer- high
Que- In case of gases Kc is replaced by_______________?
a. Ka
b. Kb
c. Kp
d. K
Answer- Kp
Que- When the value of Kc is very small then_______________________?
a. reaction is at start
b. product conc. Is maximum
c. reactant conc. Is minimum
d. reaction is completed
Answer- product conc. Is maximum
Que- Idea of pH and pOH was put forward by________________?
a. Gibbs
b. Einstein
c. Sorenson
d. Chadwick
Answer- Sorenson
Que- Ka<10-3 means______________?
a. Very strong base
b. Very weak acid
c. Very strong acid
d. Very strong salt
Answer- Very weak acid
Que- Which of the following is a macro nutrient ?
a. boron
b. iron
c. copper
d. carbon
Answer- carbon
Que- Three elements needed for the healthy growth of plants are_________________?
a. N P K
b. N K C
c. N S P
d. N Ca P
Answer- N P K
Que- Residence time of methane in the atmosphere is___________________?
a. 3 – 7 days
b. 2 -3 days
c. 3 – 7 years
d. 2 – 3 years
Answer- 3 – 7 years
Que- Hypochlorous acid is used for disinfecting the water it reacts with the dissolved ammonia producing___________________?
a. NH2Cl
b. NHCI2
c. NCI2
d. all of the above
Answer- all of the above
Que- Acid present in acid rain may be__________________?
a. H2SO4
b. HNO3
c. both A and B
d. none
Answer- both A and B
Que- Which of the following is not a condition for the formation of smog ?
a. sufficient NO
b. sunlight
c. less movement of air
d. winds
Answer- winds
Que- In which of the following layer of atmosphere there is more thickness of ozone layer ?
a. troposphere
b. stratosphere
c. mesosphere
d. photosphere
Answer- stratosphere
Que- Which of the following air pollutants is more dangerous for ozone layer ?
a. CFC
b. CO2
c. CO
d. Oxides of nitrogen
Answer- CFC
Que- Which statement is wrong ?
a. the amount of ozone layer is greater in the region close to the equator
b. ozone acts as filter for UV radiations
c. in the equatorial region it acts as pollutant
d. CFCs play effective role in removing O3 in the stratosphere
Answer- the amount of ozone layer is greater in the region close to the equator
Que- In the purification of portable water the coagulant used is_________________?
a. alum
b. nickel sulphate
c. copper sulphate
d. barium sulphate
Answer- alum
Que- Newspaper can be recycled again and again how many times ?
a. 2
b. 3
c. 4
d. 5
Answer- 5
Que- The main pollutant of leather tanneries in the waste water is____________________?
a. chromium III
b. chromium IV
c. chromium V
d. chromium VI
Answer- chromium IV
Que- Which substance can be used for disinfecting water ?
a. KMnO4
b. Alums
c. Ozone
d. All
Answer- KMnO4
Que- Which one of the following makes the bulk of hydrospheres content ?
a. oceans
b. glaciers & icecaps
c. fresh water lakes and ponds
d. All have equal distribution
Answer- oceans
Que- The percentage of suspended solid waste in raw water is removed by coagulation is__________________?
a. 60
b. 70
c. 80
d. 90
Answer- 80
Que- The main product of bacterial action is_________________?
a. Nox
b. NO2
c. N2O3
d. NO
Answer- NO
Que- Pollutants have adverse effect over_________________?
a. Biosphere
b. Ecosystem
c. Both a & b
d. Hydrosphere
Answer- Ecosystem
Que- Which of the following is not a heavy industry ?
a. iron
b. fertilizer
c. paper
d. none
Answer- none
Que- Requirement of macronutrient per acre of the land is_________________?
a. 5 to 200 kg
b. 20-200 kg
c. 200-400 kg
d. 30-400 kg
Answer- 5 to 200 kg
Que- Which of the following is not a secondary pollutant_________________?
a. ozone
b. carbonic acid
c. sulphuric acid
d. carbon dioxide
Answer- carbon dioxide
Que- Major cause of SO2 on global scale is__________________?
a. volcanoes
b. electric sparks
c. combustion
d. all
Answer- volcanoes
Que- The yellow colour in photochemical smog is due to presence of__________________?
a. dinitrogen oxide
b. nitrogen dioxide
c. chlorine gas
d. chlorine dioxide
Answer- nitrogen dioxide
Que- Which of the following is not primary pollutant__________________?
a. SO3
b. CO
c. NO
d. H2SO4
Answer- H2SO4
Que- Which of the following gases is the main cause of acid rain ?
a. CO
b. NO2
c. both a & b
d. none of the above
Answer- NO2
Que- Which of the following factors help to measure quallity of water ?
a. DO
b. BOD
c. COD
d. all of the above
Answer- all of the above
Que- A single chlorine free radical can destroy how many ozone molecules ?
a. 10
b. 100
c. 10000
d. 100000
Answer- 100000
Que- Chlorination of water may be harmful if the water contains_________________?
a. Ammonia
b. Dissolved oxygen
c. Carbon dixide
d. All
Answer- Ammonia
Que- Which of the following is used as water disinfectant to avoid the formation of toxic compounds_________________?
a. Cl2
b. O3
c. ClO2
d. both B & C
Answer- both B & C
Que- Ozone hole is substantial depletion of ozone in every year during__________________?
a. Aug – Nov
b. Sep – Nov
c. Nov – Dec
d. Dec – Jan
Answer- Sep – Nov
Que- Which of the following solutions of H2SO4 is more concentrated ?
a. 1 Molar solution
b. 1 molal solution
c. 1 normal solution
d. all have same concentration
Answer- 1 Molar solution
Que- Which of the following is an example of liquid in gas solution?
a. Opals
b. Dust particles in smoke
c. Paints
d. Fog
Answer- Fog
Que- Which of the following are the conditions of colligative properties_______________?
a. Non-electrolye solute
b. Non-volatile solute
c. Dilute solution
d. All of the above
Answer- All of the above
Que- When common salt is dissolved in water ?
a. Boiling point of water decrease
b. Boiling point of water increase
c. Boiling point of water remains same
d. None of the above
Answer- Boiling point of water increase
Que- Homogeneous mixture of two or more than two compounds is called__________________?
a. solution
b. compound
c. radical
d. ion
Answer- solution
Que- Solution with maximum concentration of solute at given temperature is called________________?
a. Super saturated solution
b. unsaturated solution
c. saturated solution
d. dilute solution
Answer- saturated solution
Que- Number of moles in 1 kg of solvent is called_________________?
a. normality
b. molarity
c. molality
d. mole fraction
Answer- molality
Que- In partially miscible liquids the two layers are___________________?
a. saturated solutions of each liquid
b. unsaturated solutions of each liquid
c. normal solution of each liquid
d. no layer formation takes place
Answer- saturated solutions of each liquid
Que- The relative lowering of vapour pressure is_____________________?
a. equal to the mole fraction of solvent
b. equal to the mole fraction of solute
c. directly proportional to the mole fraction of solute
d. both B & C
Answer- both B & C
Que- Mixtures which distill over without change in composition called___________________?
a. zeotropic mixture
b. azeotropic mixture
c. amphoteric mixture
d. ideal solution
Answer- azeotropic mixture
Que- Solubility of KCIO3 gives__________________?
a. continuous and falling solubility curve
b. discontinuous and falling solubility curve
c. continuous and rising solubility curve
d. discontinuous and rising solubility curve
Answer- continuous and rising solubility curve
Que- Boiling point elevations can be measured by__________________?
a. Beckmanns method
b. Landsbergers method
c. Linds method
d. none of the above
Answer- Landsbergers method
Que- The compounds in which water molecules are added are called_______________?
a. Hydrated ions
b. double salts
c. hydrates
d. complexes
Answer- hydrates
Que- Solution of Na2SO4 will be_________________?
a. basic
b. acidic
c. neutral
d. cannot be presicted without data
Answer- neutral
Que- 1 molar solution of glucose in water contains weight of glucose________________?
a. 180g/dm3
b. 170g/dm3
c. 190g/dm3
d. 195g/dm3
Answer- 180g/dm3
Que- Water of crystallization can be removed by________________?
a. drying
b. heating
c. evaporation
d. All of the above
Answer- heating
Que- Which one of the following salt does not hydrolyzed________________?
a. Na2SO4
b. AlCl3
c. CuSO4
d. NH4Cl
Answer- Na2SO4