Chemistry problems
- 1. Which of the following statement(s) is/are CORRECT? I. Acids are sour in taste and generate H+ ions. II. Acids are sour in taste and generate OH? ions. III. Bases are bitter intaste and generate OH? ions.
Options- A. Only I and III
- B. Only I and II
- C. Only II and III
- D. All I, II and III Also asked in: Bank Exams
Correct Answer: Only I and III
- 2. Binomial Nomenclature was founded by
Options- A. Charles Darwin
- B. Robert Nucleus
- C. Carl Linnaeus
- D. Lamarck Also asked in: Bank Exams
Correct Answer: Carl Linnaeus
- 3. Magnetite is an ore/mineral of
Options- A. Beryllium
- B. Chromium
- C. Iron
- D. Lead Also asked in: Bank Exams
Correct Answer: Iron
- 4. The poisonous gas accidentally released in Bhopal Gas Tragedy is
Options- A. Methane
- B. Nitrous Oxide
- C. Methyl Isocyanate
- D. Cyanogen Also asked in: Bank Exams
Correct Answer: Methyl Isocyanate
- 5. The conversion of hard water into soft water by boiling or adding calcium hydroxide is called _______.
Options- A. Baker's process
- B. Temp's process
- C. Clarke's process
- D. Lake's process Also asked in: Bank Exams
Correct Answer: Clarke's process
- 6. Which of the following gases is produced due to incomplete combustion of fuel?
Options- A. Carbon Dioxide
- B. Carbon Monoxide
- C. Methane
- D. Ethane Also asked in: Bank Exams
Correct Answer: Carbon Monoxide
- 7. Which of the following is the strongest base?
Options- A. LiCH3
- B. LiF
- C. LiOH
- D. LiNH2 Also asked in: GATE, Bank Exams, AIEEE, Bank PO, Bank Clerk, Analyst
Correct Answer: LiCH3
Explanation:
The stability of the ions is determined by the energy of the lone pairs. Carbon has the least effective nuclear charge (Zeff) and so the lone pair on the CH3? ion has the highest energy, making it the least stable ion and so the strongest base. The Zeff increases as we move across the period until we get to fluorine which has the greatest Zeff and so its lone pairs have the lowest energy, making F? the least basic ion.
In order of decreasing basicity they are ranked LiCH3 > LiNH2 > LiOH > LiF. We are dealing with the ions F?, OH?, NH2? and CH3? and so the factor which influences their basicity is the stability of the ion compared to its conjugate acid.
- 8. Antimony is
Options- A. metal
- B. non metal
- C. non metaloid
- D. metalloid Discuss
Correct Answer: metalloid
- 9. The process that takes place in the atom bomb is
Options- A. nuclear fusion
- B. nuclear fission
- C. radioactive disintegration
- D. chemical decomposition Discuss
Correct Answer: nuclear fission
Explanation:
In the atom bomb, isotopes of uranium are disintegrated with the release of a large amount of energy. Hence, the process is nuclear fission.
- 10. The function of nitrogen in air is
Options- A. to make air a moderate supporter of combustion
- B. to maintain the density of air constant
- C. to prevent the hydrogen in air from exploding
- D. to reduce the poisonous nature of ozone in air Discuss
Correct Answer: to make air a moderate supporter of combustion
Explanation:
If air contained all oxygen and no nitrogen, everything would have burnt off
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