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- Question
Artificial radioactivity elements are present in
Options- A. s - block
- B. p - block
- C. d - block
- D. f - block
- Correct Answer
- f - block
- 1. A bond formed by the transfer of electrons between atoms of the elements is called
Options- A. Ionic bond
- B. Covalent bond
- C. Co-ordinate bond
- D. Hydrogen bond Discuss
- 2. Leakage in LP gas cylinders is easily detected by adding
Options- A. mercaptans
- B. propylene
- C. carbon disulphide
- D. phosgene Discuss
- 3. Which of the following is called 'the King of Chemicals' ?
Options- A. Nitric acid
- B. Hydrochloric acid
- C. Silver nitrate
- D. Sulphuric acid Discuss
- 4. Standard Electrode potential is measured in terms of
Options- A. Pyrometer
- B. Electrometer
- C. Thermometer
- D. Voltmeter Discuss
- 5. A bond formed by the transfer of electrons betwwen atoms of the elements is called
Options- A. ionic bond
- B. covalent bond
- C. co ordinate bond
- D. none Discuss
- 6. The atoms of the elements which have same number of neutrons are called
Options- A. Isobars
- B. Isotopes
- C. Isotones
- D. None Discuss
- 7. The atoms of the elements having same atomic number but different mass number are called
Options- A. Isobar
- B. Isotopes
- C. Iso electronic
- D. Isotones Discuss
- 8. Ozone is concentrated in the
Options- A. Stratosphere
- B. Troposphere
- C. Ionosphere
- D. Mesosphere Discuss
- 9. What is the bond order of N2+?
Options- A. 3
- B. 1.5
- C. 2.5
- D. 2 Discuss
- 10. Most commonly used bleaching agent is
Options- A. Chlorine
- B. Alcohol
- C. Carbon dioxide
- D. Sodium Chloride Discuss
Chemistry problems
Search Results
Correct Answer: Ionic bond
Correct Answer: mercaptans
Explanation:
mercaptans (or thioalcohols) have a foul odour
Correct Answer: Sulphuric acid
Explanation:
Sulphuric acid is called the King of Chemicals because it is used in the preparation of a very large number of other useful chemicals such as hydrochloric acid, nitric acid, dyes, drugs etc. In fact the annual production of shulpuric acid in a country is a measure of the economy of the country.
Correct Answer: Voltmeter
Explanation:
Voltmeter is used to measure Standard Electrode Potential
Correct Answer: ionic bond
Correct Answer: Isotones
Correct Answer: Isotopes
Correct Answer: Stratosphere
Explanation:
Most of the ozone in the atmosphere is found in the layer of stratosphere, which begins about 10.16 kilometers (6.10 miles) above Earth's surface and extends up to about 50 kilometers (31 miles) altitude.
Correct Answer: 2.5
Explanation:
Bond Order = 1/2[ Nb - Na]
where
Nb = Number of electrons in bonding molecular orbitals.
Na = Number of Electrons in antibonding molecular orbitals
Bond Order of N2?:
Total number of electrons: 13
Electronic Configuration= :?1s² ?*1s² ?2s² ?*2s² ? 2py² [?2pz² ?2px1 ]
Bond Order = [9-4]/2 = 5/2 = 2.5.
Correct Answer: Chlorine
Explanation:
Chlorine is the most commonly used bleaching agent.
Bleaching agents are compounds which are used to remove color from substances such as textiles. A bleaching agent is a material that lightens or whitens a substrate through the chemical reaction. The bleaching reactions usually involve oxidative or reductive processes that degrade color systems.
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