InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Class 11 knowledge and support exam preparation. Choose a topic below to get started.
| 5001. |
Which compound have ionic as well as covalent character? |
| Answer» KCI | |
| 5002. |
Balance the redox using both methods P4 + OH-produce PH3 + HPO2 - |
| Answer» | |
| 5003. |
Why is bf3 is nonpolar |
| Answer» Because the central atom have no lone pair of electrons and the shared electrons are equally attracted by the two atoms | |
| 5004. |
Different b/w election negativity and electron gain enthalpy |
| Answer» Electron egativity is a the tendency of an atom to attract the lone pair in bond towards itself. It is a hypothetical It is like temperature. It is just an indirect way to measure the kinetic energy of a system.Electron gain enthalpy is defined as the energy released/absorbed by an isolated gaseous atom when an electron is brought inside it.Electron affinity is the amount of energy gain or lost by the surrounding of an isolated gaseous atom when an electron is brought inside it.. The greater the negative value of electron gain enthalpy, the greater the stability of the atom. The greater the positive value of electron affinity, the greater the stability of the atom. Electron gain enthalpy = -(electron affinity)<br>Electron gain enthalpy is defined as the removal of the valence electron from the valence shell of the isolated gaseous atom. | |
| 5005. |
Meaning of dipole |
| Answer» Two oppositely charged particals | |
| 5006. |
Explain the importance of four quantum numbers |
| Answer» n=energy of electrons l=sub shell m=orbitals=orientation of electrons | |
| 5007. |
In basic medium eqn if we do as acidic medium and later convert into basic why ans is not correct? |
| Answer» | |
| 5008. |
Calculate volume occupied by 7g N2 at 27 degree Celsius and 750 mm of Hg? |
| Answer» | |
| 5009. |
Define dipole moment |
| Answer» A dipole moment is a quantity that describes two opposite charges separated by a distance. | |
| 5010. |
Method of doing electronic configuration |
| Answer» 1.Find your atom\'s atomic number.2.Determine the charge of the atom3.Memorize the basic list of orbitals4.Understand electron configuration notationFor example, here is a simple electron configuration: 1s2 2s2 2p6. This configuration shows that there are two electrons in the 1s orbital set, two electrons in the 2s orbital set, and six electrons in the 2p orbital set. 2 + 2 + 6 = 10 electrons total. This electron configuration is for an uncharged neon atom (neon\'s atomic number is 10.)5.Memorize the order of the orbitals6.Fill in the orbitals according to the number of electrons in your atom.Thus, the electron configuration for calcium is: 1s2 2s2 2p6 3s2 3p6 4s2.Note: Energy level changes as you go up. For example, when you are about to go up to the 4th energy level, it becomes 4s first, then 3d. After the fourth energy level, you\'ll move onto the 5th where it follows the order once again. This only happens after the 3rd energy level. | |
| 5011. |
Water droplets are spherical why |
| Answer» Surface tension is responsible for the shape of liquid droplets. Although easily deformed, droplets of water tend to be pulled into a spherical shape by the cohesive forces of the surface layer. | |
| 5012. |
What is a photon? |
| Answer» Packets of energy in the form of light | |
| 5013. |
Which of the following particles, moving with same velocities will posses shorter wavelength? |
| Answer» | |
| 5014. |
Can we make any bond between two atoms/ions which would be indestructible in nature? |
| Answer» Yes , chemical bonds are formed between indivisible or indestructible atoms of different or same elements yielding molecules of certain compounds. Ions can also react to form bonds in the similar way.\xa0 | |
| 5015. |
What will be the mass of 1 atom of carbon12 in gram |
| Answer» 1.992646547*10^-23 gram | |
| 5016. |
1 mole = |
| Answer» 6.022*10^23 particles<br>6.022 | |
| 5017. |
What is the relation between normality and molarity |
| Answer» | |
| 5018. |
What is the difference between normality and molarity |
| Answer» Normality=molarity ×n-factor | |
| 5019. |
What is quantum? |
| Answer» The packets of radiant energy is called quantum<br>The smallest particle of an at is called quantum | |
| 5020. |
what mole |
| Answer» One mole of any substance contain as much as many entities (atoms, molecules,ions) as there are atoms in exactly 12 gram of carbon . It is a special number known as Avogadro\'s number.i.e. 6.022*10^23 particles. | |
| 5021. |
Why atomic spectrum are discontinuos |
| Answer» | |
| 5022. |
Pls give a better explanation for hyperconjugation |
| Answer» | |
| 5023. |
What is hunds rule of maximum multiplicity? |
| Answer» According to this rule electron pairing will not take place in a subshell untill each orbital of the subshell is singaly occupied. | |
| 5024. |
What is Heisenberg uncertainty principle |
| Answer» It states that it is impossible to measure simultaneously the position and momentum of a small particle with accuracy. | |
| 5025. |
Write the drawbacks of Rutherford\'s model...!!! |
| Answer» It could not explain the following :1)stability of atom 2) line spectra of elements3) distribution and energy of electrons | |
| 5026. |
What is Black body. |
| Answer» A black body is a body that absorbs radiation of all frequencies<br>It is a perfect radiator and absorber of energy | |
| 5027. |
What is real and ideal gas |
| Answer» Real gases are non-hypothetical gases whose molecules occupy space and have interactions; consequently, they adhere to gas laws.\xa0An ideal gas is a theoretical gas composed of many randomly moving point particles whose only interaction is the perfectly elastic collision.The ideal gas concept is useful because it obeys the ideal gas law, a simplified equation of state, and is amenable to analysis under statistical mechanics. | |
| 5028. |
VSEPR THEORY |
| Answer» Valence shell electron pair repulsion (VSEPR) theory is a model used in chemistry to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms. It is also named the Gillespie-Nyholm theory after its two main developers. | |
| 5029. |
What is frequency hindi me |
| Answer» | |
| 5030. |
Why does pcl5 fume in moisture? |
| Answer» | |
| 5031. |
Significance of electronegativity? |
| Answer» To. Know.. Electronic gain.. Tendency | |
| 5032. |
what is lother Meyer law |
| Answer» According to him when draw the graph of atomic volumes with respect to atomic masses , then the elements having similar properties occupy solar positions on the curve. | |
| 5033. |
Calculate the mass percent of different elements present in sodium sulphate |
| Answer» | |
| 5034. |
Which element have most negitive electron gain enthalpy and which least negitive. P, s, cl, f |
| Answer» F | |
| 5035. |
What is isomerism in details? |
| Answer» The phenomenon by virtue of which different organic compounds have same molecular formula but different structural formulae | |
| 5036. |
Calculate the velocity of an electronic in bohr first of hydrogen atom |
| Answer» | |
| 5037. |
What is superoxide |
| Answer» | |
| 5038. |
What is separation of mixture? |
| Answer» | |
| 5039. |
Why does\'t the 5d1 electron go 4f orbital in Lanthanum? |
| Answer» | |
| 5040. |
Which property of cathode rays led us to believe the existence of electron in matter |
| Answer» These rays get deflected towards the anode | |
| 5041. |
Please give me the definition for wave number |
| Answer» No. Of waves present in 1 cm or it is reciprocal of wavelength | |
| 5042. |
What is molecular mass of nitric acid |
| Answer» 63 | |
| 5043. |
An oxide of manganese was found to contain 69.64%Mn.What is the simplest formula of an oxide? |
| Answer» | |
| 5044. |
What is hybridization explain me in brief? |
| Answer» | |
| 5045. |
How to find the enthalpy of the formation |
| Answer» | |
| 5046. |
Can ethen form conformatiom |
| Answer» | |
| 5047. |
Define pi bond and sigma bond |
| Answer» | |
| 5048. |
Rutherford model |
| Answer» | |
| 5049. |
What is organic compund |
| Answer» Organic compound, any of a large class of chemical\xa0compounds\xa0in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen. | |
| 5050. |
What is Magnetic quantum numbers?? |
| Answer» The\xa0magnetic quantum number\xa0m determines the\xa0number\xa0of orbitals and their orientation within a subshell. Consequently, its value depends on the orbital angular momentum\xa0quantum number\xa0l. Given a certain l, m is an interval ranging from –l to +l, so it can be zero, a negative integer, or a positive integer. | |