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- Question
The magnetic moment (spin only) of [NiCl4]2- is
Options- A. 1.41 BM
- B. 1.82 BM
- C. 5.46 BM
- D. 2.82 BM
- Correct Answer
- 2.82 BM
ExplanationHybridisation of Ni is
Unpaired in is 2
So
- 1. 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 Discuss
- 2. 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) Discuss
- 3. 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
- 4. 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
- 5. The number of neutrons in dipositive Zinc ion is
Options- A. 34
- B. 36
- C. 38
- D. 40 Discuss
- 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 Discuss
- 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 Discuss
- 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 Discuss
- 9. Which of the following is also known as Carbolic Acid?
Options- A. Phenol
- B. Hydroxide
- C. Sulphuric Acid
- D. Ethanol Discuss
- 10. Which of the following gases is heavier than oxygen?
Options- A. Carbon dioxide
- B. Ammonia
- C. Methane
- D. Helium Discuss
Chemistry problems
Search Results
Correct Answer: All the above
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.
Correct Answer: Rutherford and Soddy
Correct Answer: atomic number
Correct Answer: 40
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.
Correct Answer: involve release of energy
Correct Answer: Phosphorous and Nitrogen
Correct Answer: Phenol
Correct Answer: Carbon dioxide
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