ECAT Chemistry MCQ's Test For Full Book With Answers

ECAT Chemistry MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 Unit of ozone is: Debye Dobson Esu Coulumb
2 Depletion of ozone is more during the month: Jan - March April - Ju8n July - Aug Sept - Nov
3 A single free chlorine radical can destroy ozone molecules upto: 100000 100 1000 10000
4 How much pesticides have been synthesized at present? Four thousands Six thousands Eight Thousands Ten thousands
5 Forms of waste products : Heat Smoke Solid All of these
6 Contamination of water of tanning industries is due to: Cr(III) Cr(VI) Mn(III) Mn(VII)
7 Factors affecting quality of water: D.O BOD COD All of these
8 BOD is the oxygen demand with in days(s): Four Two Three Five
9 Water is purified by the process: Aeration Coagulation Chlorination All of these
10 Which is used as a coagulant: Ferric Salts Potash alum a and b both Chlorine
11 Chloroform is carcinogenic: Heart Lungs Liver Kidney
12 Newspaper can be recycled again and again by how many times? 2 3 4 5
13 The temperature in the incineration process has a range: 900<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span>to 1000<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 650 to 1100<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 950<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C to 1300</span><span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 500<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C to 900</span><span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span>
14 In purification of potable water the coagulant used is: Nickel Sulphate Copper Sulphate Barium Sulphate Aluminium Sulphate
15 The main pollutant of leather tanneries in the waste is due to the salt of: lead Chromium (VI) Copper Chromium (III)
16 DDT is a: Fungicide Insecticide Herbicide All
17 Fungicides are the pesticides which: Control the growth of fungus Kill insects Kills plants Kills herbs
18 A single chloride free radical can destroy bow many ozone molecules? 100 100000 10000 10
19 The range of UV-B is: 320 to 400 nm 200 to 280 nm 280 to 320 nm 50 to 400 nm
20 Peroxyacetylnitrate (PAN) is an irritant to human beings and it affects: Eyes Ears Stomach Nose
21 The pH range of the acid rain is: 7 - 6.5 6.5 - 6 6 - 5.6 Less than 5
22 After chlorination, the pulp is washed at: 20<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 30<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 40<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 60<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span>
23 At present cement plants in Pakistan are: Ten Twenty Two Four Twenty Four
24 The cement plants in west Pakistan at the time of creation were: Ten Twenty Four Twenty four
25
Which fills the space between needles in cement setting?
 Ca(OH)<sub>2</sub> Al(OH)<sub>3</sub> CaCO<sub>3</sub> MgSO<sub>4</sub>
26 Gypsum added in the cement is : 5% 10% 15% 20%
27 Urea has concentration when prepared before prlilling: 100% 99.7% 82% 46%
28 Urea has concentration when prepared before prlilling: 46% 82% 99.7% 100%
29 Which is a component of micro nutrient? N Zn P K
30 Which is a component of macronutrient? Zn N Mo Cl
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