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Uptron (likely referring to Plasma or Ionization)

25 MCQ questions with answers and explanations

Test yourself▶ 25 question test

Q1. A catalyst is a substance that slows down the rate of a chemical reaction.

  1. Aincreases
  2. Breduces
  3. Cconverts
  4. Dnone of these
Show answer & explanation

Answer: C) converts

Q2. Who discovered the catalyst?

  1. ABergicius
  2. BRutherford
  3. CLewis
  4. DKossel
Show answer & explanation

Answer: A) Bergicius

Q3. When the physical states of both reactants and catalyst are the same, it is called catalyst.

  1. Aheterogeneous catalyst
  2. Bhomogeneous catalyst
  3. CCatalytic poison
  4. DApostle Umerk
Show answer & explanation

Answer: B) homogeneous catalyst

Q4. When the physical states of both the reactants and the catalyst are different, then the catalyst is called

  1. Ahomogeneous riser
  2. Bheterogeneous fermenter
  3. CInduced Catalysis
  4. Dstimulant poison
Show answer & explanation

Answer: B) heterogeneous fermenter

Q5. A negative catalyst is one that

  1. Adecrease the rate of reaction
  2. Bincreases the rate of reaction
  3. Ckeep the rate of the reaction unchanged
  4. Dbehaves as an induced catalyst
Show answer & explanation

Answer: A) decrease the rate of reaction

Q6. positive catalyst is one which

  1. Adecrease the rate of reaction
  2. Bincreases the rate of reaction
  3. Ckeep the rate of the reaction unchanged
  4. Dbehave as an induced stimulus
Show answer & explanation

Answer: B) increases the rate of reaction

Q7. If a product acts as a catalyst in a reaction, it is called

  1. Ahomogeneous riser
  2. Bheterogeneous catalyst
  3. Cself-motivating
  4. DInduced Catalysis
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Answer: C) self-motivating

Q8. Catalytic Poison is

  1. Averb inhibitor
  2. Bself-lifting
  3. CSamang Urak
  4. Dheterogeneous catalyst
Show answer & explanation

Answer: A) verb inhibitor

Q9. How does 'catalytic poison' work?

  1. Aby chemical combination with a catalyst
  2. Bby combining with free valencies on the catalyst surface
  3. Cby combining with a reactant
  4. Dby coagulating the catalyst
Show answer & explanation

Answer: B) by combining with free valencies on the catalyst surface

Q10. acts as a promoter

  1. Aincreasing the surface energy of the catalyst
  2. Bmaking the catalyst surface more uneven
  3. CMaking the catalyst surface smoother than before
  4. DIncreasing the rate of analysis of page packages
Show answer & explanation

Answer: B) making the catalyst surface more uneven

Q11. Bio-Catalyst is—

  1. Aamino acids
  2. BC⁶H¹²O⁶
  3. CN²
  4. Denzymes
Show answer & explanation

Answer: D) enzymes

Q12. Which substance acts as a poison for the Pt catalyst in the contact process of manufacturing sulfuric acid?

  1. ASulphur
  2. Barsenic oxide
  3. CCO²
  4. Darsenic sulfide
Show answer & explanation

Answer: D) arsenic sulfide

Q13. Which of the following elements prove to be good catalysts?

  1. ATransition elements
  2. Balkali metals
  3. Calkali metals
  4. Dcolored metal
Show answer & explanation

Answer: A) Transition elements

Q14. The catalyst used in the hydrogenation of oils is

  1. AFe
  2. BNi
  3. CMo
  4. DPt
Show answer & explanation

Answer: B) Ni

Q15. It is used as a stirrer in the lead chamber process.

  1. AOxides of nitrogen
  2. BPlatinum
  3. CNickel
  4. DMnO²
Show answer & explanation

Answer: A) Oxides of nitrogen

Q16. Which of the following substances acts as an inhibitor for the iron (Fe) catalyst in the Haber process of ammonia?

  1. ACo²
  2. BNo
  3. CH2
  4. DCo
Show answer & explanation

Answer: D) Co

Q17. Which enzyme converts glucose into alcohol?

  1. AZymes
  2. BInversion
  3. CMaltem
  4. DDiastase
Show answer & explanation

Answer: A) Zymes

Q18. When potassium chlorate is heated, it decomposes into potassium chloride and oxygen. When manganese dioxide is added, the reaction is accelerated. This is because

  1. AManganese dioxide decomposes to release oxygen
  2. BManganese dioxide reacts with heat
  3. CManganese dioxide produces good contact
  4. DManganese dioxide acts as an emulsifier.
Show answer & explanation

Answer: D) Manganese dioxide acts as an emulsifier.

Q19. It is used as a catalyst in the contact process of making sulphuric acid.

  1. Airon powder
  2. Bplatinum powder
  3. COxides of nitrogen
  4. DNickel metal
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Answer: B) platinum powder

Q20. It is used as a catalyst in the Deacon process of preparing chlorine gas.

  1. AOxides of nitrogen
  2. BHot Alumina
  3. CCupric Chloride
  4. Diron powder
Show answer & explanation

Answer: C) Cupric Chloride

Q21. It acts as a catalyst in the Haver process of ammonia production.

  1. ANickel
  2. BIron
  3. CPlatinum
  4. DMolybdenum
Show answer & explanation

Answer: D) Molybdenum

Q22. The catalyst used in the preparation of sulfur (H²SO⁴) in the contact process is

  1. APb
  2. BFe + Mo
  3. CV²O⁵
  4. DCO + Ni
Show answer & explanation

Answer: C) V²O⁵

Q23. In which process vanadium pentoxide is used as a catalyst?

  1. Acontact process
  2. BHavers process
  3. CSolvay process
  4. Dlead chamber process
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Answer: A) contact process

Q24. The role of a catalyst in a chemical reaction is to change

  1. Aheat of reaction
  2. Boutput of the reaction
  3. Cactivation energy
  4. Dequilibrium constant
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Answer: C) activation energy

Q25. Which of the following is correct regarding a catalyst? 1. It increases the rate of reaction 2. It increases the activation energy 3. It decreases the activation energy 4. It is consumed in the reaction

  1. ACodes: 1 and 2
  2. B1 and 3
  3. C1 and 4
  4. D3 and 4
Show answer & explanation

Answer: B) 1 and 3

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