Sail E0 Webinar

General Knowledge > General Science

CHEMISTRY MCQs

Total Questions : 2589 | Page 254 of 259 pages
Question 2531. The metals commonly used for electroplating are
  1.    Nickel, Lead and Chromium
  2.    Gold, Sodium and Potassium
  3.    Gold, Sodium and Chromium
  4.    Chromium, Copper and Nickel
 Discuss Question
Answer: Option D. -> Chromium, Copper and Nickel
Question 2532. A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed?
  1.    From brown to orange-red
  2.    From blue to pink
  3.    From brown to blue-black
  4.    From pink to blue-green
 Discuss Question
Answer: Option C. -> From brown to blue-black
Question 2533. In galvanization, iron is coated with
  1.    Copper
  2.    Zinc
  3.    Tin
  4.    Nickel
 Discuss Question
Answer: Option B. -> Zinc
Question 2534. The coating of a thin layer of zinc on steel or iron objects is known as
  1.    Tinning
  2.    Galvanising
  3.    Hot dipping
  4.    Electroplating
 Discuss Question
Answer: Option B. -> Galvanising
Question 2535. An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a :
  1.    Uninterrupted power supply (UPS)
  2.    Power transmittor
  3.    Battery
  4.    Generator
 Discuss Question
Answer: Option C. -> Battery
Question 2536. The process of improving the quality of rubber by heating it with sulphur is called.
  1.    Vulcanization
  2.    Galvanization
  3.    Acceleration
  4.    Sulphonation
 Discuss Question
Answer: Option A. -> Vulcanization
Question 2537. Combustion of a candle is a/an
  1.    Photochemical reaction
  2.    Endothermic reaction
  3.    Exothermic reaction
  4.    Physical change
 Discuss Question
Answer: Option C. -> Exothermic reaction
Question 2538. Which of the following is chiefly present in LPG (Liquefied Petroleum Gas) ?
  1.    Ethane
  2.    Butane
  3.    Methane
  4.    Propane
 Discuss Question
Answer: Option B. -> Butane
Question 2539. Candle is a mixture of
  1.    Bees wax and stearic acid
  2.    Paraffin was and stearic acid
  3.    Bees wax and paraffin wax
  4.    Higher fatty acids and stearic acid
 Discuss Question
Answer: Option B. -> Paraffin was and stearic acid
Question 2540. Rusting of iron takes place due to
  1.    Corrosion
  2.    Exfoliation
  3.    Carbonation
  4.    Oxidation
 Discuss Question
Answer: Option D. -> Oxidation

Latest Videos
Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)
Direction Sense Test Part 1 Reasoning (Hindi)
Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE
Cube & Cuboid Part 1 Reasoning (Hindi)
Data Interpretation (DI) Basic Concept Reasoning (Hindi)
Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)
Sail E0 free webinar Webinars
Real Numbers Part 7 Class 10 Maths
Real Numbers Part 1 Class 10 Maths
Polynomials Part 1 Class 10 Maths

Latest Test Papers

DSP Combined 1 Free Revision Test SAIL JO E-0
GPOE / GPA Combined 1 Free Revision Test SAIL JO E-0
BSP Plant Specific Review Test SAIL JO E-0
BSL Combined 1 Free Revision Test SAIL JO E-0
GFM Combined 1 Free Revision Test SAIL JO E-0