Questions and answers for exam Preparation

MCQs

Total Questions : 108 | Page 2 of 11 pages

Question 11. Which of the following is the correct equation?

CO₂ + H₂O → H₂CO₃
CO₂ + H₂O → HCO₃
CO₂ + H₂O → H₃CO₃
CO₂ + H₂O → H₂CO₂

Discuss Question

Answer: Option A. -> CO₂ + H₂O → H₂CO₃
Answer: (a).CO₂ + H₂O → H₂CO₃

Question 12. Which of the following is not a condensation reaction?

ADP + inorganic phosphate → ATP + H₂O
R-OH + inorganic phosphate → phosphate ester + H₂O
R-COOH + inorganic phosphate → Acyl phosphate + H₂O
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6CO₂

Discuss Question

Answer: Option D. -> 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6CO₂
Answer: (d).6CO₂ + 6H₂O → C₆H₁₂O₆ + 6CO₂

Question 13. Buffer capacity is maximum when __________

One mole of NH₄Cl is added to two moles of NH₄OH
One mole of NH₄Cl is added to one moles of NH₄OH
One mole of NH₄Cl is added to one mole of NaOH
One mole of NaCl is added to one mole of NaOH

Discuss Question

Answer: Option B. -> One mole of NH₄Cl is added to one moles of NH₄OH
Answer: (b).One mole of NH₄Cl is added to one moles of NH₄OH

Question 14. The processes i and ii are respectively.
i) CuSO₄ + 5H₂O → CuSO₄.5H₂O
ii) PCl₃ + 3H₂O → H₃PO₃ + 3HCl

Hydration and dehydration
Hydration and hydrolysis
Hydrolysis and hydrolysis
Hydration and hydration

Discuss Question

Answer: Option B. -> Hydration and hydrolysis
Answer: (b).Hydration and hydrolysis

Question 15. Consider the following reaction, in the presence of light
2H₂O + 2X → O₂ + 2XH₂
Which of the following statements is true?

X is electron-accepting specie
X is electron-donating specie
Water is an electron acceptor
Water neither donates nor accepts any electron

Discuss Question

Answer: Option A. -> X is electron-accepting specie
Answer: (a).X is electron-accepting specie

Question 16. Identify the products formed in the following reaction.
CH₃COOCH₃ + H₂O → A + B

CH₃COOH and CH₃OH
CH₃COOOH and CH₄
CO₂ and C₂H₆
No reaction

Discuss Question

Answer: Option A. -> CH₃COOH and CH₃OH
Answer: (a).CH₃COOH and CH₃OH

Question 17. If pH of solution of NaOH is 12.0 the pH of H₂SO₄ solution of same molarity will be ____________

2.0
12.0
1.7
10.0387

Discuss Question

Answer: Option C. -> 1.7
Answer: (c).1.7

Question 18. Tertiary conformation of proteins is maintained by 3 types of bonds namely ionic, hydrogen and ____________

Sulfide
Disulfide
Covalent
Peptide

Discuss Question

Answer: Option B. -> Disulfide
Answer: (b).Disulfide

Question 19. 1M NaCl and 1M HCl are present in an aqueous solution. What is the solution?

Not a buffer solution with pH < 7
Not a buffer solution with pH > 7
A buffer solution with pH < 7
A buffer solution with pH > 7

Discuss Question

Answer: Option A. -> Not a buffer solution with pH < 7
Answer: (a).Not a buffer solution with pH < 7

Question 20. What does it mean when we say that water acts as a “heat buffer”?

It keeps the temperature of an organism relatively constant as the temperature of the surroundings fluctuates
It increases the temperature of an organism as the temperature of the surroundings increases
It decreases the temperature of an organism as the temperature of the surroundings increases
It increases the temperature of an organism as the temperature of the surroundings decreases

Discuss Question

Answer: Option A. -> It keeps the temperature of an organism relatively constant as the temperature of the surroundings fluctuates
Answer: (a).It keeps the temperature of an organism relatively constant as the temperature of the surroundings fluctuates