Discussion
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- Question
There are ............ metalloids in the modern periodic table.
Options- A. 5
- B. 4
- C. 7
- D. 6
- Correct Answer
- 6
- 1. Which of the following elements has the electronic configuration 2, 8, 3?
Options- A. Magnesium
- B. Sodium
- C. Aluminium
- D. Argon Discuss
- 2. What is the natural source of Oxalic acid?
Options- A. Tomato
- B. Sour milk
- C. Ant sting
- D. Tamarind Discuss
- 3. Which of the following statement(s) is/are CORRECT?
Options- A. Oxides of non-metals are basic
- B. Oxides of non-metals are acidic
- C. Oxides of metals are acidic
- D. All options are correct Discuss
- 4. Vinegar is __________ .
Options- A. diluted acetic acid
- B. glacial acetic acid
- C. glacial formic acid
- D. diluted formic acid Discuss
- 5. Nitrification is the biological process of converting
Options- A. N2 into nitrate
- B. N2 into nitrite
- C. Ammonia into nitrite
- D. Ammonia into N2 Discuss
- 6. 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
- 7. Calculate the relative molecular mass of water H2O ?
Options- A. 18u
- B. 1.8u
- C. 2.0u
- D. 20u Discuss
- 8. 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% Discuss
- 9. 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
- 10. 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
Chemistry problems
Search Results
Correct Answer: Aluminium
Correct Answer: Tomato
Correct Answer: Oxides of non-metals are acidic
Correct Answer: diluted acetic acid
Correct Answer: Ammonia into nitrite
Correct Answer: Hydrogen
Correct Answer: 18u
Correct Answer: 9.35%
Correct Answer: A and B
Correct Answer: Electrolysis
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