Chemistry problems
- 1. Which of the properties of the element is a whole number
Options- A. atomic mass
- B. atomic number
- C. atomic radius
- D. atomic volume Discuss
Correct Answer: atomic number
- 2. Who present the theory of radioactive disintegration
Options- A. Rutherford and Soddy
- B. Soddy and Fajan
- C. Thomson and Rutherford
- D. Hahn and strassman Discuss
Correct Answer: Rutherford and Soddy
- 3. Which solution has the highest pH?
Options- A. 50.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq)
- B. 50.0 mL 0.0500 M sodium hydroxide, NaOH (aq)
- C. 50.0 mL 0.0500 M nitric acid, HNO3 (aq)
- D. 50.0 mL 0.0500 M nitrous acid, HNO2 (aq) Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: 50.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq)
Explanation:
50.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq) has the highest pH value.
Sodium hydroxide and Calcium hydroxide are strong bases so they completely ionize in solution. Because they ionize at the same rate, and Calcium hydroxide has the higher pH calculated, then Calcium hydroxide, in fact, has the highest pH.
Nitric acid is a strong acid, so it completely ionizes in water. Whilst nitrous acid is a weak acid. Therefore, the nitric acid solution has the LOWEST ph.
- 4. Which of the following describes the process of glycolysis?
Options- A. It represents the first stage in the chemical oxidation of glucose by a cell.
- B. Breakdown of Glucose
- C. Converts Glucose to Pyruvate
- D. All the above Also asked in: GATE, CAT, Bank Exams, AIEEE, Bank PO, Analyst
Correct Answer: All the above
- 6. Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to prevent it from freezing at ?6°C will be: (Kf for water = 1.86 Kg/mol and molar mass of ethylene glycol = 62 kg/mol)
Options- A. 204.60 g
- B. 304.30 g
- C. 804.32 g
- D. 400.00 g Also asked in: AIEEE
Correct Answer: 804.32 g
Explanation:
for ethylene glycol in aq. solution
=> w = 800 g
So, the weight of solute should be more than 800 g.
- 7. A feature of catabolic reactions is that they
Options- A. occur only in mitochondria
- B. occur only during loss of body weight
- C. involve release of energy
- D. involve consumption of energy Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk
Correct Answer: involve release of energy
- 8. Tertiary sewage treatment is designed to remove
Options- A. Calcium and Phosphorous
- B. Nitrogen and Calcium
- C. Phosphorous and Nitrogen
- D. Calcium and Nitrogen Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: Phosphorous and Nitrogen
- 9. Which of the following is also known as Carbolic Acid?
Options- A. Phenol
- B. Hydroxide
- C. Sulphuric Acid
- D. Ethanol Also asked in: Bank Exams
Correct Answer: Phenol
- 10. Which of the following gases is heavier than oxygen?
Options- A. Carbon dioxide
- B. Ammonia
- C. Methane
- D. Helium Also asked in: Bank Exams
Correct Answer: Carbon dioxide
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