ECAT Chemistry MCQ's Test For Full Book With Answers

ECAT Chemistry MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 Hydrocarbon molecule with large chain lengths experience: Weaker attractive forces Stronger attractive forces Repulsive forces No attractive forces
2 In a group on going downward, polarizability generally: Decreases Increases Remain constant Negligible
3 London dispersion forces are also called: Hydrogen bonding. Debye forces Van der Waal's forces Instantaneous dipole-induced dipole forces.
4 London dispersion forces are alos called: Hydrogen bonding. Debye forces Van der Waal's forces Instantaneous dipole-induced dipole forces.
5 The inter-molecular forces in liquids are: Negligible Very weak Very strong Reasonably strong
6 The gases can be converted into liquids by: Increasing the pressure only. Lowering temperature and increasing pressure Increasing pressure and bringing temperature below critical points Lowering temperature only
7 Which one of the following is weakest inter molecular force? Dipole induced dipole forces Ionic dipole forces Electrostatic forces b/w ions Dipole dipole forces
8 The density of water decreases, When it is freezed at 0°C Change of bond length Change of bond angles Cubic structure of ice Empty spaces present in the structure of ice
9 ]Which of the following is a pseudo solid?

Atoms of He is gaseous stat at high temperate. Molecules of water in liquid state. Molecules of solid l<sub>2</sub> Molecular of hydrochloric acid gas
10 Force of attraction b/w atoms of He is : London dispersion forces Hydrogen bonding Coordinate covalent bond Covalent bond
11 Chloroform and acetone are soluble in each other due to: Instantaneous dipole interactions. Dipole-dipole interactions. Inter molecular hydrogen bonding. All of above
12 Diamond is a bad conductor because: It<i></i>has tight structure It has a high density There is no free electron present in the crystal of diamond of conduct electricity is transparent to light
13

Which of the following is a pseudo solid?

<p class="MsoNormal">CaF<sub>2</sub> <o:p></o:p></p> <p class="MsoNormal">Glass<o:p></o:p></p> <p class="MsoNormal">NaCL<o:p></o:p></p> <p class="MsoNormal">All<o:p></o:p></p>
14 The molecules of CO2 in dry ice from the : Ionic crystals Coverlet crystals Molecular crystals Any type of crystals
15 Amorphous solids: Have a sharp melting point Undergo clean cleavage when cut with knife Have a perfect arrangement of atoms Can possesses small regions of orderly arrangement of atoms
16 Ionic solids are characterized by : Low meeting points Good conductivity in solid state High vapor pressure Solubility in polar solvents
17 A graph b/w P and 1/V at constant temperature and number of moles is parallel to : None of above X-axis Z-axis Y-axis
18 A graph b/w P and 1/V at constant temperature and number of moles is parallel to : Y-axis Z-axis X-axis None of above
19 Boyle's law doesn't fail even : Temperature is extremely high Pressure is extremely high Mixture of gas is taken All of above
20 According to Boyle's law, which parameters give a straight line parallel to axis-s, when we plot a graph between: V and T P and V P and 1/V P and PV
21 Boyle's law is represented as : <p class="MsoNormal">P<b><span style="font-size:18.0pt;mso-bidi-font-size:11.0pt;line-height:107%">∞</span></b> 1/T<o:p></o:p></p> V and 1/P P<b><span style="font-size: 18pt; line-height: 25.68px;">∞</span></b>P P<b><span style="font-size: 18pt; line-height: 25.68px;">∞</span></b>1/P
22 For a gas obeying Boyle's law if pressure is doubled, the volume becomes : Remain constant Double One half None of above
23 In Boyle's law which of the following pair is variable : Temperature and quantity of a gas. Pressure and volume Volume and quantity of a gas. Pressure and quantity of a gas.
24 In Boyle's law which of the following pair remains constant : Temperature and quality of a gas. Pressure and quality of a gas. Temperature and pressure Temperature and quantity of a gas.
25 The relation ships b/w volume of given amount of gas and prevailing conditions of temperature and pressure are : Charles's law Graham's law Boyle's law Gas law
26 The intramolecular force in gases are : Weak Normal Very weak Strong
27 Liquids are less common than : Solids Plasmas Gases All of above
28 Gases shows uniform behavior toward their : Internal conditions External conditions Internal and external conditions None of above
29 Cooling happens under the Joule Thomson Effect due to sudden : Contraction Absortption Expansion All of above
30 In solids, the temperature of is the measure of Rotational kinetic energies <span style="font-family: Arial, sans-serif; font-size: 10.5pt; line-height: 14.98px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">transnational kinetic</span>energies <span style="font-family: Arial, sans-serif; font-size: 10.5pt; line-height: 14.98px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="font-family: Arial, sans-serif; font-size: 10.5pt; line-height: 14.98px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Vibrational</span>kinetic</span>energies None of the above
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