Discussion
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- Question
After cleaning the thermometer should be placed in
Options- A. Sanitizer
- B. Ice cold water
- C. Mercury
- D. None of the above
- Correct Answer
- Sanitizer
- 1. Rust is formed from iron and
Options- A. Carbon
- B. Oxygen
- C. Hydrogen
- D. All of the above Discuss
- 2. Which element has similar properties to Beryllium?
Options- A. Manganese
- B. Calcium
- C. Both A & B
- D. Helium Discuss
- 3. Place these hydrocarbons in order of decreasing boiling point. 1. Paraffin 2. Octadecane 3. Hexane 4. Neohexane and 5. Ethane
Options- A. Paraffin > Octadecane > Neohexane > Hexane > Ethane
- B. Paraffin > Octadecane > Hexane > Neohexane > Ethane
- C. Hexane > Paraffin > Octadecane > Neohexane > Ethane
- D. None of the above Discuss
- 4. Which atom has the largest radius?
Options- A. Neon
- B. Francium
- C. Helium
- D. Cesium Discuss
- 5. Which compound contains both ionic and covalent bonds?
Options- A. NaNO3
- B. CaSO4
- C. NH4Cl
- D. All of the above Discuss
- 6. Group 7A of the periodic table contains the
Options- A. most reactive metals
- B. least reactive non metals
- C. most reactive non metals
- D. least reactive metals Discuss
- 7. Which substance contains metallic bonds?
Options- A. C6H12O6
- B. Hg
- C. H2O
- D. NaCl Discuss
- 8. Which gas is used in tube light?
Options- A. Oxygen
- B. Hydrogen
- C. Neon
- D. Nitric oxide Discuss
- 9. The process of conversion of sugar to alcohol is called
Options- A. Moulding
- B. Infection
- C. Fermentation
- D. Alcohol fixation Discuss
- 10. The element gold occurs in which period?
Options- A. 11
- B. 5
- C. 6
- D. 7 Discuss
Chemistry problems
Search Results
Correct Answer: Oxygen
Explanation:
Rust is formed from iron and oxygen.
Correct Answer: Calcium
Explanation:
The elements in the same column will have similar properties. Beryllium is the group II element. Group II elements are magnesium, calcium, strontium, barium and radium. Hence, these show the similar prperties.
Correct Answer: Paraffin > Octadecane > Hexane > Neohexane > Ethane
Explanation:
In hydrocarbon, the boiling point directly varies with the length of carbon chain. On increasing the number of carbon atom, the boiling point of the compound also increases. Paraffin contains highest number of carbon atoms whereas, ethane is comprised of two carbon atoms.
The decreasing order of boiling point of mention compounds is written as follows:
Paraffin > Octadecane > Hexane > Neohexane > Ethane
Correct Answer: Francium
Correct Answer: All of the above
Explanation:
Here all the given compounds have both ionic and covalent bonds.
NaNO3 - In Sodium nitrate, Nitrate is covalently bonded as nitrogen is bonded with 3 oxygen atoms. And this nitrate is ionically bonded with sodium.
CaSO4 - In Calcium sulphate, sulphate is covalently bonded as sulphur is bonded with 4 oxygen atoms. And this sulphate is ionically bonded with calcium.
NH4Cl - In Ammonium chloride, ammonium is covalently bonded as nitrogen is bonded with 4 hydrogen atoms. And this ammonium is ionically bonded with chlorine.
Correct Answer: most reactive non metals
Correct Answer: Hg
Explanation:
Metallic bond is a bond between two metal atoms. Here in the given option Hg is the only metal with metallic bond.
Correct Answer: Neon
Correct Answer: Fermentation
Correct Answer: 6
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