Chemistry problems
- 1. The purest form of iron is
Options- A. wrought iron
- B. steel
- C. pig iron
- D. nickel steel Also asked in: GATE, CAT, Bank Exams, AIEEE, Bank PO, Bank Clerk, Analyst
- 2. Hydrogen bomb is based on the principle of
Options- A. nuclear fission
- B. nuclear fusion
- C. natural radioactivity
- D. artificial radioactivity Also asked in: CAT, Bank Exams, AIEEE, Bank PO, Bank Clerk, Analyst
Correct Answer: nuclear fusion
- 3. What is the structure of IF7 ?
Options- A. Triagonal bipyramid
- B. Pentagonal bipyramid
- C. Square pyramid
- D. tetrahedral Discuss
Correct Answer: Pentagonal bipyramid
Explanation:
In IF7 out of 7 Flourine atoms 5 of them are placed on a plane in Pentagon shape .In remaining 2 flourines one is placed above the plane and other below the plane each at 90 degrees
- 4. Which of the following is a non metal that remains liquid at room temperature ?
Options- A. Chlorine
- B. Phosphorous
- C. Bromine
- D. Helium Also asked in: Bank Exams, AIEEE, Analyst, Bank Clerk, Bank PO
Correct Answer: Bromine
- 5. When formaldehyde and potassium hydroxide are heated , we get
Options- A. Acetylene
- B. Methyl alcohol
- C. Methane
- D. Ethyl formate Discuss
Correct Answer: Methyl alcohol
- 6. Name the Scientist who stated that matter can be converted into energy
Options- A. Boyle
- B. Lavoisier
- C. Avogadro
- D. Einstein Discuss
Correct Answer: Einstein
- 7. Among the given nutrients, milk is a poor source of
Options- A. Calcium
- B. Protein
- C. Vitamin C
- D. Carbohydrates Discuss
Correct Answer: Vitamin C
- 8. Which one of the following is not a mixture
Options- A. air
- B. mercury
- C. milk
- D. cement Discuss
Correct Answer: mercury
- 9. Brass gets discoloured in air because of the presence of which of the following gases in air ?
Options- A. Hydrogen sulphide
- B. Oxygen
- C. Nitrogen
- D. Carbon dioxide Also asked in: AIEEE, Bank Exams, CAT, GATE, Bank Clerk, Bank PO
Correct Answer: Hydrogen sulphide
- 10. ' Yellow cake ' an item of smuggling across border s
Options- A. A crude form of heroin
- B. A crude form of cocaine
- C. Uranium oxide
- D. Unrefined gold Discuss
Correct Answer: Uranium oxide
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