(Model Test Paper) Medical Entrance & Engineering Entrance Model Examinations For Chemistry

Test Paper : Medical Entrance & Engineering Entrance Model Examinations For Chemistry

Question 1: To test whether a given clear liquid is water of the following methods,the best one could be

    1. smell the liquid
    2. Add anhydrous copper sulphate and look for the colour change
    3. Taste the liquid
    4. moisten the litmus paper with liquid and see for the colour change
Correct Answer: 2.


Question 2: Conc.sulphuric acid is 90% by mass with density 1.8 g per ml.in order to prepare 2 lit.0.2 m sulphuric acid the volume of the concentrated acid required is

    1. 19.6ml
    2. 24.2 ml
    3. 39.2 ml
    4. 49ml

Correct Answer: 2.


Question 3: Which of the following device is used to separate carbon particles from gaseous effluents?
    1. Electric discharger
    2. Cottrell precipitator
    3. Dialyser
    4. None of the above
Correct Answer: 2.


Question 4: In a reversible isothermal process, the change in internal energy is
    1. Zero
    2. infinity
    3. negative
    4. positive
Correct Answer: 1.


Question 5: The metal which cannot displace hydrogen form dil.HCI is
    1. Mg
    2. Zn
    3. Fe
    4. Cu
Correct Answer: 4.


Question 6: The wave length of the matter wave is independent of
    1. mass
    2. velocity
    3. momentum
    4. charge
     frequency
Correct Answer: 4.


Question 7: Carbylamine reaction is associated with
    1. Hofmann
    2. Hinsberg
    3. Wurtz
    4. Kolbe
Correct Answer: 1.


Question 8: Which of the following is not compatible with arenes?

    1. extra stability
    2. resonance
    3. delocalisation of pi electrons
    4. electrophilic addition

Correct Answer: 4.


Question 9: In haber process, molybdenum is used as the
    1. promoter
    2. catalyst
    3. accelerator
    4. catalyst poison
Correct Answer: 1.


Question 10: The line spectrum observed when electrons fall from higher level to 'L' level in the hydrogen atom is known as:

    1. Balmer series
    2. Lymann series
    3. Paschen series
    4. Brackett series
     Pfund series

Correct Answer: 1.


Question 11: Electrolytic reduction process is used for the extraction of:
    1. alkali metals
    2. alkaline earth metals
    3. aluminium
    4. all of these
Correct Answer: 4.


Question 12: Among the following : NaOH, Ca(OH)2, KOH and Zn(OH)2 The weakest base is

    1. NaOH
    2. Ca(OH)2
    3. KOH
    4. Zn(OH)2

Correct Answer: 4.


Question 13: Which of the following maintains constant sugar level in blood

    1. Gibberlins
    2. Insulin
    3. Glucogen
    4. Estrone

Correct Answer: 2.


Question 14: The enthalpy change for a reaction does not depend upon

    1. the physical states of reactants and products
    2. use of different reactants for the same product
    3. the nature of intermediate reaction steps
    4. the differences in initial or final temperatures of involved substances

Correct Answer: 3.


Question 15: Acid synthesised from its element is
    1. Formic acid
    2. Oxalic acid
    3. Acetic acid
    4. None of these
Correct Answer: 2.


Question 16: The element which belong to 3rd period and IVA group is
    1. Silicon
    2. Carbon
    3. Germanium
    4. Tin
Correct Answer: 1.


Question 17: The most electropositive element among the following is
    1. K
    2. Ca
    3. Na
    4. Mg
Correct Answer: 1.


Question 18: In a compound microscope, the intermediate image is :
    1. virtual, inverted and magnified
    2. real, inverted and diminished
    3. virtual, erect and magnified
    4. virtual, erect and diminished
     real, inverted and magnified
Correct Answer:


Question 19: Which of the following 0.1M aquueous solution will have the lowest freezing point
    1. potassium sulphate
    2. Sodium chloride
    3. Urea
    4. Glucose
Correct Answer: 1.


Question 20: Which of the following liberates methane when treated with water?
    1. calcium carbide
    2. silicon carbide
    3. iron carbide
    4. aluminium carbide
Correct Answer: 4.


Question 21: The metal extracted from sea water is:
    1. Mg
    2. Al
    3. Ca
    4. Ba
Correct Answer: 1.


Question 22: When a piece of copper wire is immersed in a solution of silver nitrate,the colour of the solution becomes blue.This is due to the
    1. Oxidation of Cu
    2. Reduction of Cu
    3. Formation of a complex
    4. Oxidation of Ag
Correct Answer: 1.


Question 23: What is the effect of the addition of sugar on the boiling and freezing points of water?
    1. Both boiling point and freezing point increases.
    2. Both boiling point and freezing point decreases.
    3. Boiling point decreases and freezing point increases
    4. Boiling point increases and freezing point decreases
     Boiling point increases and the freezing point is not affected
Correct Answer: 4.


Question 24: Which one of the following statements about halogens is correct ?
    1. F2 has lower bond dissociation energy than CI2
    2. The electron affinities are in the order F>CI
    1
    3. HF is the strongest hydrohalic acid
    4. All halogens show variable oxidation states
     Vander Waal's forces are the weakestin iodine
Correct Answer: 1.


Question 25: Assuming complete ionisation, the pH of 0.1M HCL is 1. The molarity of H2SO4 with the same Ph is:
    1. 0.1
    2. 0.2
    3. 0.05
    4. 2.0
Correct Answer: 2.


Question 26: The enthalpies of elements under the following conditions are assumed to be
    1. Zero at 298K and 1 atm
    2. Unity at 298K and 1 atm
    3. Zero at 273K and 1 atm
    4. Unity at 273K and 1 atm
Correct Answer: 1.


Question 27: The series of line present in the visible region of the hydrogen spectrum
    1. Lyman
    2. Balmer
    3. Paschen
    4. Brackett
Correct Answer: 2.


Question 28: Which of the following orbitals does not make sense?
    1. 4d
    2. 5s
    3. 3f
    4. 2p
Correct Answer: 3.


Question 29: When an electron is captured by a nucleus of an atom
    1. Its N/P ratio decreases
    2. Its N/P ratio increases
    3. Its N/P ratio remains same
    4. Anions are formed
Correct Answer: 2.


Question 30: 25 ml of a solution of barium hydroxide on titration with 0.1 molar solution of hydrochloric acid gave a litre value of 35 ml. The molarity of barium hydroxide solution was
    1. 0.07
    2. 0.14
    3. 0.28
    4. 0.35
Correct Answer: 2.


Question 31: The principal ingredient of dynamite is
    1. Gun powder
    2. Cordite
    3. Ammonium nitrate
    4. nitro glycerine
Correct Answer: 4.


Question 32: The method used for refining aluminium
    1. Bayer's process
    2. Hall's method
    3. Hoop's electrolytic process
    4. Serpeck's process
Correct Answer: 3.


Question 33: A thermodynamic quantitiy is
    1. One which is used in thermo chemistry
    2. One which obeys all the laws of thermodynamcis
    3. A quantity whose value depends only on the state of the system
    4. A quantity which is used in measuring thermal change
Correct Answer: 3.


Question 34: White phosphorous has ?
    1. six P-P single bonds
    2. four P-P single bonds
    3. three P-P single bonds
    4. five P-P single bonds
Correct Answer: 1.


Question 35: In plants, lipids occur in
    1. fruits
    2. nuts
    3. seeds
    4. All the above
Correct Answer: 4.


Question 36: All of the following are chemical changes, except
    1. Magnetizing of iron
    2. Rusting of iron
    3. Digestion of food
    4. Sourcing of milk
Correct Answer: 1.


Question 37: In a Redox reaction: ?
In a Redox reaction: ?
    1. two molecules both lose electrons.
    2. one molecule loses electrons and is reduced while the other gains electrons
    3. one molecule loses electrons and is oxidized while the other gains electrons.
    4. one molecule gains electrons and is oxidized while the other loses electrons
Correct Answer: 3.


Question 38: Action of bleaching powder n ethyl alcohol gives
    1. Chloroform
    2. Dichloro methane
    3. Trichloro ethane
    4. Ethyl chloride
Correct Answer: 1.


Question 39: The maximum KE of the photoelectron emitted from a surface is dependent on?
The maximum KE of the photoelectron emitted from a surface is dependent on?
    1. The intensity of incident radiation
    2. The potential of the collector electrode
    3. The frequency of incident radiation
    4. The angle of incidence of radiation of the surface
Correct Answer: 3.


Question 40: What is the main component of biogas and natural gas?
    1. Ethane
    2. Methane
    3. Propane
    4. Butane
Correct Answer: 2.


Question 41: The first non-radioactive light element which was shown to exhibit isotope was
    1. Hydrogen
    2. Neon
    3. Helium
    4. Lithium
Correct Answer: 3.


Question 42: IUPAC name of valiric acid is

    1. Propionic acid
    2. Burtyic acid
    3. Pentanoic acid
    4. 2-methyl butanoic acid

Correct Answer: 3.


Question 43: An ether is more volatile than an alcohol having same molecular formula. This is due to
    1. dipolar character of ethers
    2. alcohols having resonance structures
    3. inter–molecular hydrogen bonding in ethers
    4. inter–molecular hydrogen bonding in alcohols
Correct Answer: 4.


Question 44: Which of the following has the highest melting point?

    1. NaF
    2. NaCl
    3. NaI
    4. NaBr

Correct Answer: 1.


Question 45: The greater acidity trichloroacetic acid relative to acetic acid can be explained due to
    1. the inducitive effect taking place only in the acid, not in the conjugate base
    2. the trichloroacetate being stable than trichloroacetic acid
    3. the interactions between C-Cl dipoles and the -COOH group are assumed to be energetically unfavourable compared to the conjugate base
    4. the carnoxylic group being electron withdrawing
Correct Answer: 3.


Question 46: What happens when NaCl is added to hydrated ferric oxide sol?
    1. Coagulation
    2. Precipitation
    3. Flocculation
    4. All of the above
Correct Answer: 4.


Question 47: Bromination of salicylic acid gives

    1. White Precipitate
    2. Yellow Precipitate
    3. Black Precipitate
    4. Violet Precipitate

Correct Answer: 1.


Question 48: Number of pairs of enantiomers for the compound 3-chloro 2-pentanol is
    1. 1
    2. 2
    3. 3
    4. 4
Correct Answer: 2.


Question 49: Among the following which compound will show the highest lattice energy
    1. KF
    2. NaF
    3. CsF
    4. RbF
Correct Answer: 2.


Question 50: Which is the first discovered radioactive series?
    1. 4n
    2. 4n+1
    3. 4n+2
    4. 4n+3
Correct Answer: 3.

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