FINAL ANSWER KEY

Question Paper Code: 55/2016/0L

Category Code: 012/2010

Exam: Junior Instructor Laboratory Assistant-Chemical
Plant

Medium of Question: English

Date of Test 13-06-2016

Alphacode A

Question1:-Hardness in water is caused by the presence of:
A:-sodium chioride
B:-sodium carbonate
C:-calcium chloride
D:-potassium nitrate
Correct Answer:- Option-C
Question2:-pH of acidic solution is:
‏4ھ‎
‎B:-7
‎C:-less than 7
D:-more than 7
Correct Answer:- Option-C
Question3:-Which of the following methods empolyes ion-selective membranes?
A:-sofening
B:-electrodialysis
C:-super-filtration
D:-flash evaporator
Correct Answer:- Option-B
Question4:-Coagulants help in settling of:
A:-suspended impurities only
B:-fine suspended impurities
C:-colloidal particles only
D:-both the suspended and colloidal particles.
Correct Answer:- Option-D
Question5:-Ultraviolet rays are used in water treatment for :
A:-illumination
B:-sterilization
C:-coagulation
D:-sedimentation
Correct Answer:- Option-B
Questioné:-Which of following fuel gases possess the highest calorific value?
A:-water gas
B:-coal gas
C:-producer gas
D:-natural gas
Correct Answer:- Option-B
Question7:-The process of splitting of bigger hydrocarbons into smaller hydrocarbon molecules, is called:
A:-pyrolysis
B:-thermal decomposition
C:-cracking
D:-combustion
Correct Answer:- Option-C
Question8:-Analysis of flue gases is done by:
A:-Boy's gas calorimeter
B:-Orsat apparatus
C:-retort
D:-Bomb calorimeter
Correct Answer:- Option-B
Question9:-Lignite is: