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- Question
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
- Correct Answer
- Paraffin > Octadecane > Hexane > Neohexane > Ethane
ExplanationIn 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
- 1. Which atom has the largest radius?
Options- A. Neon
- B. Francium
- C. Helium
- D. Cesium Discuss
- 2. Which compound contains both ionic and covalent bonds?
Options- A. NaNO3
- B. CaSO4
- C. NH4Cl
- D. All of the above Discuss
- 3. Which of these is ATP?
Options- A. 3 Phosphate groups attached to chromosome attached to Adenine
- B. 3 Phosphate groups attached to a Ribose attached to Adenine
- C. 3 Phosphate groups attached to a Ribose attached to Thymine
- D. None of the above Discuss
- 4. What are cathode rays made of? Discuss
- 5. The relationship between a cathode and an anode involves
Options- A. Electrons
- B. Neutrons
- C. Protons
- D. Diodes Discuss
- 6. Which element has similar properties to Beryllium?
Options- A. Manganese
- B. Calcium
- C. Both A & B
- D. Helium Discuss
- 7. Rust is formed from iron and
Options- A. Carbon
- B. Oxygen
- C. Hydrogen
- D. All of the above Discuss
- 8. After cleaning the thermometer should be placed in
Options- A. Sanitizer
- B. Ice cold water
- C. Mercury
- D. None of the above Discuss
- 9. 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
- 10. Which substance contains metallic bonds?
Options- A. C6H12O6
- B. Hg
- C. H2O
- D. NaCl Discuss
Chemistry problems
Search Results
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: 3 Phosphate groups attached to a Ribose attached to Adenine
Explanation:
ATP is a Adenosine Triphosphate.
ATP is 3 Phosphate groups attached to a Ribose attached to Adenine.
Correct Answer: Cathode rays made of beams of electrons
Correct Answer: Electrons
Explanation:
The relationship between a cathode and an anode involves the transfer of electric charge between them. The cathode is the negative terminal on the battery, which has zero electric potential. The anode is the positive terminal on the battery and has the battery's maximum electric potential. Current flows from the battery's anode (positive terminal) to the cathode (negative terminal). In electron flow, electrons leave the negative side of the battery and move towards the positive side of the battery.
Hence, The relationship between a cathode and an anode involves Electrons.
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: Oxygen
Explanation:
Rust is formed from iron and oxygen.
Correct Answer: Sanitizer
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.
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