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- Question
What is the bond order of N2+?
Options- A. 3
- B. 1.5
- C. 2.5
- D. 2
- Correct Answer
- 2.5
ExplanationBond 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.
- 1. Ozone is concentrated in the
Options- A. Stratosphere
- B. Troposphere
- C. Ionosphere
- D. Mesosphere Discuss
- 2. 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
- 3. The atoms of the elements which have same number of neutrons are called
Options- A. Isobars
- B. Isotopes
- C. Isotones
- D. None Discuss
- 4. Artificial radioactivity elements are present in
Options- A. s - block
- B. p - block
- C. d - block
- D. f - block Discuss
- 5. 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
- 6. Most commonly used bleaching agent is
Options- A. Chlorine
- B. Alcohol
- C. Carbon dioxide
- D. Sodium Chloride Discuss
- 7. which of the following are chemical changes? A) Cooking of Food B) Digestion of Food C) Freezing of water D) Water is heated up
Options- A. A & B
- B. A, B & C
- C. C & D
- D. All the above Discuss
- 8. PAS is a drug used in the treatment of
Options- A. Cancer
- B. Typhoid
- C. Malaria
- D. Tuberculosis Discuss
- 9. Nucleus of Hydrogen atom consists of
Options- A. 2 protons only
- B. 2 neutrons only
- C. 1 proton only
- D. 1 electron only Discuss
- 10. How does molecular shape affect polarity? Discuss
Chemistry problems
Search Results
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: Isotopes
Correct Answer: Isotones
Correct Answer: f - block
Correct Answer: Ionic bond
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.
Correct Answer: A & B
Explanation:
A) Cooking of Food ------ Chemical Change
B) Digestion of Food ----- Chemical Change
C) Freezing of water ----- Physical Change
D) Water is heated up ---- Physical Change
because here the chemical composition of the substance changes in A & B only.
Since we know that, If the chemical composition is changing then it is a chemical change and if the chemical composition is remaining the same, then it is a physical change.
Correct Answer: Tuberculosis
Explanation:
Para-amino salicylic acid (PAS) is used in the treatment of Tuberculosis.
Correct Answer: 1 proton only
Explanation:
The nucleus of hydrogen consists of only a single proton.
Its parts are a single negatively-charged electron that circles a single positively-charged nucleus of the hydrogen atom.
The electron is bound to the nucleus by the Coulomb force.
Correct Answer: Polarity :: The polarity of a molecule defines its other physical properties such as melting point, boiling point, surface tension, vapor pressure etc Simply, polarity occurs when the electron distribution in a molecule is asymmetric This results in a net dipole moment in the molecule One end of the molecule is charged negative while the other gets a positive charge The polarization of a molecule greatly depends on the shape of the molecule A diatomic molecule like HF mentioned above has no issue of shape The net dipole moment is only due to the uneven distribution of electrons between the two atoms However, when there are more than two atoms involved in making a bond, there are many complexities The water molecule is of bent shape Therefore, when the two pair of electrons shared by oxygen with two hydrogen atoms is pulled towards oxygen, the net dipole moment results in the direction of the oxygen atom There is no other force to cancel out the resultant dipole moment Hence, the water molecule is highly polar Ammonia molecule is of a pyramid shape and the electronegative N atom pulls the electrons towards itself The three N-H bonds are not in the same plane; hence the dipole moments created do not get canceled out This makes ammonia a polar molecule However, the dipole moments sometimes get canceled due to the shape of the molecules, making the molecule non-polar Carbon dioxide is such a molecule
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