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Quiz 3
Mdcat-past-papers - ETEA - Chemistry Quiz
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Board: ETEA | Subject: Chemistry |
41. Greater the wavelength associated with the photon:
Greater is its energy
Smaller is its energy
Its energy will be variable
Its energy will remain constant
42. Which of the following property decreases in Group 2 as we go down the group?
Shielding
Atomic radius
Proton number
Ionization energy
43. Which of the following elements has highest lattice energy?
Be
C
N
O
44. Which of the following ionic compounds has the highest value of ionization energy?
NaF
LiCl
NaI
KI
45. Which of the following is the example of polar molecular solids?
Ice
Iodine
Copper
Phosphorus
46. The shape of ammonia (NH₃) is:
Trigonal bipyramidal
Trigonal planar
Trigonal pyramidal
Square planar
47. Total number of electron pairs present in the valence shell of central atom in water are:
2
4
3
5
48. Which one of the following molecules has a pyramidal structure?
CH₄
H₂O
H2
NH₃
49. Identify the compound given below which has bonds formed by overlapping of sp and p orbitals:
BeCl₂
BF₃
H₂O
NH₃
50. The unhybridized p orbital in sp² hybridization is:
Perpendicular to sp2 orbitals
Along the hybrid orbitals
In the same plane as hybrid orbitals
Forms only sigma bonds
51. Which one of the following molecules has a zero dipole moment?
BF₃
NF₃
NH₃
H₂O
52. A system that can exchange both matter and energy with the surroundings is:
Open system
Isolated system
Closed system
Adiabatic system
53. The sum of all the energies of all the molecules or atoms of a substance is called its:
Specific heat
Heat capacity
Latent heat
Internal energy
54. If the work is done by the system on the surroundings and heat is absorbed by the system, the change in internal energy ΔE will be:
ΔE = q + w
ΔE = q +(– w)
ΔE = –q – w
ΔE = –q + w
55. Calculate the work done when 1 mole of an ideal gas expands from 15 dm³ to 20 dm³ against constant external pressure of 2 atmospheres.
-10atm dm3
-5 atm dm3
-20 atm dm3
10atm dm3
56. One slice of bread with a tablespoon of peanut butter on it contains 20g carbohydrate, 10g protein, and 9g fat. Calculate total energy consumed in this intake:
158 kcal
201 kcal
173 kcal
218 kcal
57. For an endothermic reaction, H represents the enthalpy of reaction. The minimum value for the energy for activation will be:
Equal to ΔH
More than ΔH
Less than ΔH
Zero
58. The specific heat of water is:
4.2 J/gK
9.82 J/g/°C
6.04 J/g/°C
8.47 J/g/°C
59. ΔH can be measured indirectly by applying:
Avogadro's law
Gas's law
Faraday's law
Hess's law
60. Which reaction will proceed in the forward direction?
Kc = 10
Kc = 1/10
Kc = 1
Kc = 1/100
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