Discussion
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- Question
A solution contains 33 g of common salt in 320 g of water. Calculate the concentration in terms of mass, by mass percentage of the solution.
Options- A. 13.05%
- B. 9.09 g
- C. 9.35g
- D. 9.35%
- Correct Answer
- 9.35%
- 1. Calculate the relative molecular mass of water H2O ?
Options- A. 18u
- B. 1.8u
- C. 2.0u
- D. 20u Discuss
- 2. Which is the only non-metal placed at the left side of the Modern Periodic Table?
Options- A. Hydrogen
- B. Carbon
- C. Neon
- D. Helium Discuss
- 3. There are ............ metalloids in the modern periodic table.
Options- A. 5
- B. 4
- C. 7
- D. 6 Discuss
- 4. Which of the following elements has the electronic configuration 2, 8, 3?
Options- A. Magnesium
- B. Sodium
- C. Aluminium
- D. Argon Discuss
- 5. What is the natural source of Oxalic acid?
Options- A. Tomato
- B. Sour milk
- C. Ant sting
- D. Tamarind Discuss
- 6. Which of the following statements about the reaction below are INCORRECT? 2Pb + C ? 2Pb + CO2 A. Carbon di-oxide is getting, oxidised B. Lead is getting reduced C. Carbon is oxidised D. Lead oxide is getting reduced
Options- A. A and C
- B. A and B
- C. B and C
- D. A, B and C Discuss
- 7. By which of the following processes are metals of high reactivity extracted from purified molten ore?
Options- A. Reduction by an appropriate reducing agent
- B. Roasting
- C. Electrolysis
- D. Calcination Discuss
- 8. Which of the follow is the last element in Newlands Law of Octaves classification?
Options- A. Rhodium
- B. Radium
- C. Iron
- D. Thorium Discuss
- 9. Rusting is _____.
Options- A. Electrolysis
- B. Oxidation
- C. Redox reaction (Oxidation and Reduction)
- D. Reduction Discuss
- 10. Which gas contributes most to the Greenhouse effect?
Options- A. Water vapour
- B. Ozone
- C. Oxygen
- D. Nitrogen Discuss
Chemistry problems
Search Results
Correct Answer: 18u
Correct Answer: Hydrogen
Correct Answer: 6
Correct Answer: Aluminium
Correct Answer: Tomato
Correct Answer: A and B
Correct Answer: Electrolysis
Correct Answer: Thorium
Correct Answer: Redox reaction (Oxidation and Reduction)
Correct Answer: Water vapour
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