Chemistry problems
- 1. What are cathode rays made of? Also asked in: Analyst, Bank Clerk, Bank PO
Correct Answer: Cathode rays made of beams of electrons
- 2. 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 Also asked in: AIEEE, Bank Exams, GATE, Analyst, Bank Clerk, Bank PO
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.
- 3. Which compound contains both ionic and covalent bonds?
Options- A. NaNO3
- B. CaSO4
- C. NH4Cl
- D. All of the above Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
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.
- 4. Which atom has the largest radius?
Options- A. Neon
- B. Francium
- C. Helium
- D. Cesium Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Francium
- 5. 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 Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
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
- 6. Which element has similar properties to Beryllium?
Options- A. Manganese
- B. Calcium
- C. Both A & B
- D. Helium Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
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.
- 7. Rust is formed from iron and
Options- A. Carbon
- B. Oxygen
- C. Hydrogen
- D. All of the above Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: Oxygen
Explanation:
Rust is formed from iron and oxygen.
- 8. After cleaning the thermometer should be placed in
Options- A. Sanitizer
- B. Ice cold water
- C. Mercury
- D. None of the above Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Sanitizer
- 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 Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: most reactive non metals
- 10. Which substance contains metallic bonds?
Options- A. C6H12O6
- B. Hg
- C. H2O
- D. NaCl Also asked in: AIEEE, Bank Exams, GATE, Analyst, Bank Clerk, Bank PO
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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