CPMT Sample Paper Chemistry

1. Magnetic quantum number designates
(a) Size of orbitals
(b) Spatial orientation of orbitals
(c) Spin angular momentum (d) Orbital angular momentum

2. The hydrolysis of methyl formate in acid solutions has rate
expression rate = k[HCOOCH3][H+], the balanced equation being
HCOOCH3 + H2O ¾¾¾¾® HCOOH + CH3OH The rate law
contains [H+] through the balanced equation does not contain
[H+] because:
(a) more for convenience to express the rate law
(b) H+ ion is a catalyst
(c) H+ is an important constituent of any reaction
(d) all acids contain H+ ions

3. Isotonic solutions have same
(a) Vapour pressure (b) Molality (c) Molarity (d) Mole fraction

4. Change in the internal energy of one mole of Argon during
isothermal expansion is
(a) 100 cals (b) 140 cals (c) 1200 cals (d) zero

5. The shape of NH3 molecule is
(a) tetrahedral (b) pyramidal (c) trigonal planar (d) linear

6. A chemical system is in equilibrium. Addition of a catalyst would
result in
(a) increase in the rate of forward reaction
(b) increase in the rate of reverse reaction
(c) add a new reaction path
(d) increase the amount of heat evolved in the reaction

7. Which of the following is a heterogeneous mixture?
(a) Sand and Sugar (b) Smoke (c) Sand & Salt (d) All the above

8. The number of gram atoms present in 22.4 g helium is
(a) 2 (b) 2.1 (c) 5.6 (d) 11.2

9. Two electrons in an orbital are distinguished by
(a) Spin quantum number (b) Subsidiary quantum number
(c) Magnetic quantum number (d) Principle quantum number

10. Out of the following the most acidic is
(a) As2O3 (b) P2O3 (c) Sb2O3 (d) Bi2O3

11. White phosphorous contains
(a) P2 molecules (b) P6 molecules
(c) P4 molecules (d) P8 molecules

12. The appropriate current in amp/sec necessary to produce O2
gas at the rate of 10-3 litre per second is
(a) 1.723 (b) 0.1723 (c) 17.23 (d) 172.3

13. Iron is rendered passive when treated with:
(a) H2SO4 (2) HCl (c) H3PO4 (d) HNO3

14. The ionizing power of β-particle is ......... times more than that
of α-particles
(a) 10+2 (b) 10-1 (c) 10-2 (d) 10-4

15. Michalis Menten mechanism is related with
(a) thermodynamics of irreversible systems
(b) fugacity
(c) triple point
(d) kinetic analysis of enzyme catalyzed reactions

16. HVZ reaction is not given by
(a) HCOOH (b) C6H5COOH (c) Cl3.C.COOH (d) all the above

17. Electron transfer chain reactions are observed in
(a) cellular respiration (b) glycolysis
(c) digestion (d) all the above

18. Potassium crystallizes in a body centered lattice. Hence the
coordination number of potassium in potassium metal:
(a) zero (b) 8 (c) 6 (d) 4

19. The work done in changing one mole of water at 1000C to
steam at 1000C and one atmospheric pressure is given by
(a) 310 J (b) 31 J (c) 1300 J (d) 3100 J

20. Heavy water is
(a) water containing sulphates of Ca and Mg
(b) water containing heavy ions
(c) water at 40C
(d) D2O

21. The unit of specific conductivity is
(a) ohms cm-1 (b) ohms cm-2 (c) ohms-1 cm (d) ohms-1 cm-1

22. TiCl4 is readily hydrolyzed into
(a) TiO2 (b) Ti2O3 (c) TiO (d) [Ti(OH2)]

23. The number of ions formed when cupramonium sulphate
dissolved in water is
(a) one (b) two (c) four (d) zero

24. The shape of XeF2 molecule is
(a) tetrahedral (b) pyramidal (c) trigonal planar (d) linear

25. The rate of reaction is doubled for every 100 rise in
temperature. The increase in reaction rate as a result of
temperature rise from 100 to 1000 is:
(a) 112 (b) 512 (c) 400 (d) 614

26. LEUCO compound havig highest Pkb value among the following
is
(a) (CH3)3N (b) (CH3)2NH (c) CH3NH2 (d) NH3

27. The first ionization potential will be maximum for
(a) lithium (b) hydrogen (c) uranium (d) iron

28. When conc. HNO3 is heated with P2O5, it forms
(a) N2O (b) NO (c) NO2 (d) N2O5

29. In the metallurgy of iron, limestone is added to blast furnace,
the calcium on ends up in:
(a) slag (b) gange (c) calcium carbonate (d) calcium oxide

30. For a reaction in equilibrium
(a) there is no volume change
(b) the reaction has stopped completely
(c) the rate of forward reaction is equal to the rate of
backward reaction
(d) the forward reaction is faster than the reverse reaction

31. The total energy of the electron in hydrogen atom is
(a) Less than zero (b) Equal to zero
(c) Infinity (d) Greater than zero

32. GUN cotton contains
(a) glucose (b) pyrolyxin (c) α -amylose (d) cellulose trinitrate

33. The pH of an aqueous solution of CH3COONa will be
(a) 3 (b) 7 (c) 9 (d) 14

34. In square close packing the central sphere is in contact with
----- spheres in one layer
(a) 6 (b) 12 (c) 8 (d) 4

35. Proton is
(a) Alpha particle (b) Ionized hydrogen atom
(c) Doubly ionized helium atom (d) Ionized hydrogen molecule

36. The value of Van der Waals constant 'a' is the largest for
(a) O2 (b) NH3 (c) H2 (d) N2

37. Phorone is obtained by the condensation of
(a) 2 molecules of CH3-CHO (b) 2 molecules of CH3-CO-CH3
(c) 3 molecules of CH3-CHO (d) 3 molecules of CH3-CO-CH3

38. Water is a mixture of
(a) CO and H2 (b) CO2 and H2O
(c) CO and N2 (d) CO, H2 and N2

39. The product of atomic weight and specific heat for solid
elements in k cal / mol is
(a) 6.4 (b) 5 (c) 7.2 (d) 5.6

40. To a mixture of acetic acid and sodium acetate a further
amount of sodium acetate is added. The pH of the mixture:
(a) increases (b) decreases
(c) remains unchanged (d) not predictable

41. The enthalpies of elements in their standard states are taken
as zero. Hence the enthalpy of formation of a compound
(a) should always be negative
(b) should always be positive
(c) will be equal to twice the energy of combustion
(d) may be positive or negative

42. Joule - Thomson effect is zero in the case of
(a) Real gas (b) Permanent gas (c) Ideal gas (d) Non ideal gas

43. Acetaminophen is a
(a) analgesics (b) disinfectant (c) antipyretic (d) none of these

44. During the extraction of Fe, slag obtained is
(a) FeO (b) FeSiO3 (c) MgSiO3 (d) CaSiO3

45. 1 mole of hydrated CuSO4 contains
(a) 90 moles of water (b) 90 atoms of water
(c) 90 g of water (d) 9 g of oxygen

46. In fluorite structure, the arrangement of spheres is
(a) acc (b) hcc (c) hcp (d) ccp

47. The number of significant digits in 0.00002 and 20,000
respectively are
(a) 1 and 5 (b) 1 and 1 (c) 5 and 1 (d) 6 and 5

48. When Fe(OH)3 sol is added to As2S3 sol, then
(a) a new solution is formed (b) an emulsion is formed
(c) an zoetrope is formed (d) flocculation takes place

49. Boltzmann constant with respect to gas constant is
(a) Gas constant for 100 molecules
(b) Gas constant for 10 mole of gas
(c) Gas constant for 1 mole only
(d) Gas constant for 1 molecule only

50. The number of moles of solute present in 1000 ml of the water
and aqueous solution are respectively called
(a) Morarity & Morality (b) Morality & Molarity
(c) Normality & Molarity (d) Normality & Molality

Answers

1 B 11 C 21 D 31 A 41 D
2 B 12 C 22 A 32 D 42 C
3 C 13 D 23 B 33 C 43 C
4 D 14 C 24 D 34 D 44 D
5 B 15 D 25 B 35 B 45 C
6 C 16 D 26 D 36 B 46 D
7 D 17 A 27 B 37 D 47 A
8 C 18 B 28 D 38 A 48 D
9 A 19 D 29 A 39 A 49 D
10 B 20 D 30 C 40 A 50 B

CPMT Sample Paper Chemistry

1. In a reversible reaction, a catalyst
(a) increases the rate of forward reaction
(b) increases the rate of the backward reaction
(c) alters the rates of the forward and backward reactions
equally
(d) increases the rate of the forward reaction more than it
increases the rate of the backward reaction

2. A property which increases gradually down a group in the
periodic table is
(a) electro negativity (b) strength as a reducing agent
(c) ionization potential (d) electron affinity

3. The lightest particle is
(a) electron (b) proton (c) neutron (d) α -particle

4. Law of Multiple Proportion was postulated by
(a) Lavoisier (b) Proust (c) Dalton (d) Richter

5. The smallest possible unit of a chemical compound is
(a) an electron (b) a proton (c) an atom (d) a molecule

6. The total number of moles present in 12 kg of ozone and 32g of
SO2 in a gaseous mixture is
(a) 1 mol (b) 0.5 mol (c) 0.75 mol (d) 1.25 mol

7. In ammonium chloride, the nitrogen atom is united to four
hydrogen atoms in the form of an ammonium ion, NH4+ and is,
therefore,
(a) tetravalent
(b) surrounded by four electrons
(c) surrounded by eight electrons
(d) surrounded by seven electrons

8. A metal which does not form a stable carbonate is
(a) Be (b) Li (c) Ag (d) Cd

9. Sulphur dioxide beaches colouring matter by
(a) oxidation (b) reduction (c) decomposition (d) dehydration

10. A compound may be separated into its elements by
(a) evaporation (b) decomposition
(c) synthesis (d) destructive distillation

11. Nitric acid does not react with
(a) copper (b) gold
(c) mercury (d) magnesium

12. Two gases A and B having the same volume diffuse through a
porous partition in 20 and 10 seconds respectively. f the
molecular weight of A is 49, the molecular weight of B is
(a) 40 (b) 20.25 (c) 10.25 (d) 12.25

13. The law of conservation of mass is fully valid in
(a) radioactive transformations (b) atom bomb
(c) chemical reaction (d) artificial transmutation

14. The sulphide zone in the earth is called
(a) Lithophil (b) Atmophil (c) Chalcophil (d) Siderophil

15. Which of the following bonds is most polar?
(a) Cl-Cl (b) N-F (c) C-F (d) O-F

16. Nitric acid converts iodine into
(a) hydriodic acid (b) iodic acid
(c) hypoiodous acid (d) ammonium iodine

17. Which one of the following types of elements exhibit variable
valency?
(a) normal elements (b) typical elements
(c) transitional elements (d) non-metallic elements

18. Which of the ionization energy values for calcium shows a
sudden increase?
(a) first (b) second (c) third (d) fourth

19. When boric acid is neutralized with sodium hydroxide we get
the salt, NaBO2. This sows that boric acid, H3BO3 is
(a) monobasic (b) dibasic (c) tribasic (d) a strong acid

20. Which of the following metal is not obtained by electrolytic
reduction
(a) Al (b) Fe (c) K (d) Mg

21. Which of the following contains more molecules?
(a) 1 g hydrogen (b) 1 g helium (c) 1 g oxygen (d) 1 g nitrogen

22. The allotropic form of sulphur produced by pouring boiling
sulphur in cold water is
(a) prismatic (b) rhombic (c) monoclinic (d) amorphous

23. When salt water is distilled, the salt is found in the
(a) distilling flask (b) receiver (c) cooling water (d) condenser

24. Oxygen is liberated on heating
(a) potassium permanganate (b) ammonium dichromate
(c) bleaching powder (d) sodium peroxide

25. Maximum covalency among the representative element is
limited to
(a) 6 (b) 7 (c) 8 (d) 9

26. Heavy water is made by
(a) dissolving salts of heavy metals in distilled water
(b) repeated distillation and condensation of water
(c) burning deuterium in oxygen
(d) by burning the heavier isotope of oxygen in hydrogen

27. The metallic carbide which reacts with water producing
methane is that of
(a) nickel (b) magnesium (c) boron (d) beryllium

28. Electromagnetic radiation with maximum wavelength is
(a) ultraviolet (b) radio wave (c) X-ray (d) infrared

29. Chlorine does not oxidize
(a) ferric ion (b) hydrogen (c) oxygen (d) stannous ion

30. Which one of the following pairs of elements does not illustrate
the diagonal relationship in the Periodic Table?
(a) Li and Na (b) Li and Mg (c) Be and Al (d) B and Si

31. Thallium shows different oxidation states because
(a) of the inert pair effect (b) it is amphoteric
(c) it is a d-block element (d) it is an f-block element

32. Oxygen readily reacts at ordinary temperature with
(a) N2O (b) NO (c) NO2 (d) N2O5

33. Law of definite proportion is to be modified on the basis of
(a) Atomic theory (b) The discovery of isotopes
(c) Avogadro's hypothesis (d) None of these

34. Such substances as readily form colloidal solutions in contact
with water are termed.
(a) hydrophilic colloids (b) hydrophobic colloids
(c) crystalloids (d) peptizing agents

35. The direct change from solid to gaseous state is referred to as
(a) deliquescence (b) efflorescence
(c) sublimation (d) dissociation

36. An open bulb containing air at 190C was cooled to a certain
temperature at which the number of moles of the gaseous
molecules increased by 25%. Then the final temperature is
(a) -22.40C (b) -32.40C (c) -39.40C (d) -42.50C

37. Uncombined hydrogen is found in
(a) acids (b) hydrogen peroxide
(c) natural gas (d) blast furnace gases

38. An unbalanced chemical equation is against the law of
(a) gaseous volumes (b) constant proportions
(c) conservation of mass (d) mass action

39. The Law of Reciprocal Proportion was postulated by
(a) Richter (b) Lomonosov (c) Lavoisier (d) Dalton

40. On heating a liquid, its viscosity
(a) increases (b) decreases
(c) remains same (d) reduces to zero

41. The atomic number of an element is 20. Its valency is
(a) 1 (b) 2 (c) 3 (d) 4

42. The elements that form water-soluble compounds with the
alkali metals are found in the Periodic Table in group
(a) I (b) II (c) IV (d) VII

43. The carbonaceous gaseous fuel which does not contain any
hydrocarbon is
(a) LPG (b) blue gas (c) natural gas (d) gober gas

44. When two atoms combine, there occurs a rearrangement of
their
(a) molecules (b) nuclei (c) protons (d) electrons

45. The most abundant metal in earth's crust is
(a) aluminium (b) iron (c) sodium (d) calcium

46. The possible number of sub shells in n=3 energy level are
(a) 1 (b) 2 (c) 3 (d) 4

47. Who suggested that every element has certain maximum
covalency depending upon its atomic number?
(a) Sidgwick (b) Pauling (c) Bohr (d) Thomson

48. The law of conservation of mass was postulated by
(a) Lovoisier (b) Lomonosov (c) Proust (d) both (a) and (b)

49. Which of the following elements does not exhibit allotropy?
(a) Arsenic (b) Tin (c) Silicon (d) Bromine

50. The number of moles of impure potassium chlorate of 75%
purity required to produce 24g of oxygen is
(a) 1 mol (b) 0.5 mol (c) 0.75 mol (d) 0.67 mol

Answers

1 C 11 B 21 A 31 A 41 B
2 B 12 D 22 D 32 B 42 D
3 A 13 C 23 A 33 B 43 B
4 C 14 C 24 A 34 A 44 D
5 D 15 C 25 B 35 C 45 A
6 C 16 B 26 C 36 C 46 C
7 C 17 C 27 D 37 C 47 A
8 C 18 C 28 A 38 C 48 D
9 B 19 A 29 A 39 A 49 D
10 B 20 B 30 A 40 B 50 D