ECAT - University of Engineering and Technology (UET) Lahore 2017 Past Paper with Answers

Practice the ECAT - University of Engineering and Technology (UET) Lahore 2017 past paper with 60 solved MCQs, answers and topic coverage.

60 solved MCQs across 1 approved paper

The bubbling up of gas from soda drink is best explained by:Answer: Decreased pressure of the surroundings cause the gas to come out from high pressure liquid The effect of pressure on density of gas is explained as under:Answer: Increase in pressure causes increase in density Forces which make the liquefaction of Helium gas possible are:Answer: London dispersion forces Existence of sulphur in two forms is:Answer: Allotropy The boiling point of hydrofluoric acid (HF) as compared to water (H₂O) is due to:Answer: Formation of one hydrogen bond by F atom per HF molecule as compared to two hydrogen bonds by O atom per H₂O molecule Radiations emitted in the form of Photons when electrons of Hydrogen atom full from higher level to n = 1 level are in the:Answer: Ultra-violet region The structure of nitrogen molecule (N₂) is explained by:Answer: End to end overlap of orbitals form sigma (σ) bond and sideways overlap of other orbitals form two pi (π) bonds The solubility of sodium chloride in water is possible because:Answer: Hydration energy of water is greater than lattice energy According to first law of thermodynamics, if thermal energy is applied to water placed in a cylinder fitted with a frictionless piston:Answer: All of these NaCl is not soluble in acetone because:Answer: Acetone molecules cannot overcome the inter-ionic forces of NaCl Ethylene glycol is mixed with water in automobile radiators as antifreeze because:Answer: All of these The purpose of two half cells in a galvanic cell is:Answer: Chemical reaction between the solutions of two half cells does not take place Catalyst helps in a reaction by:Answer: Both Options A and B are correct Sub-group “B” of the periodic table represents:Answer: Less typical elements When an electron is added to Othen the energy change is expressed by:Answer: Electron affinity The important usage of lime in agriculture is:Answer: For neutralizing acidic soils Quartz crystal has typical tetrahedral structure between oxygen and silicon atoms. How many silicon atoms are connected to an oxygen atom in this structure:Answer: 2 True statement(s) about paramagnetic property of transition elements is/are:Answer: Both A and B are correct Tubes made of steel can be hammered while hot, but a cutting tool also made of steel cannot be hammered while hot. This due to:Answer: More carbon content in cutting tools Alkanes are less reactive as compared to alkenes because:Answer: All of these Important property of polymers of PVC pipes is:Answer: Can be softened repeatedly on heating and hardened when cooled with little change in property According to the author, which of the following attributes is (are) characteristic of female tarantulas? i. maternal instincts ii. Visual acuity iii. FertilityAnswer: I only The word “excites” in line 29 most nearly meansAnswer: Stimulates The author’s attitude toward tarantulas would best be described asAnswer: Objective The main purpose of the passage is toAnswer: Summarize what is known about the physical and social responses of tarantulas The description of what happens when one films a tarantula’s reaction to the touch of a cricket (lines 44-48) chiefly is intended to convey a sense of the tarantula’sAnswer: Quickness in attacking The word “independent” in line 63 most nearly meansAnswer: Self-governing In the passage, the author does all of the following except:Answer: Pose a question In the paragraphs immediately following this passage, the author most likely willAnswer: Describe how the digger wasp goes about attacking The word “They” in line 63 refers which of the followingAnswer: Tarantulas