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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.
| 5101. |
Why the balloon containing air loses its air when left for 2to 3 days? |
| Answer» Because the air molecules can easily get diffused to the surface | |
| 5102. |
What is electromagnetic wave? |
| Answer» | |
| 5103. |
What is the meaning of Spectra of light |
| Answer» | |
| 5104. |
What is photon mean and defination |
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| 5105. |
What will be the total no of electrones present in 0.3 gram of nitrate ion |
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| 5106. |
What is critical pressure |
| Answer» | |
| 5107. |
The hybrid state of c in Charcoal is |
| Answer» | |
| 5108. |
A hybrid orbital fromed from s and p orbital can we contribute to |
| Answer» | |
| 5109. |
20g of sodim hydroxide dissolved 1.25 of solutions |
| Answer» | |
| 5110. |
Explain Hund\'s rule. |
| Answer» | |
| 5111. |
define avogadro ? |
| Answer» the number of atoms or molecules in one mole of a substance, equal to 6.023 × 1023<font size="2"> </font> is called Avogadro\'s number | |
| 5112. |
What is the mass of 100 molecules of sucrose ?? |
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| 5113. |
What is orbit, shell, orbital ? Is there is any difference between them? |
| Answer» Orbit and shell one of THEe same thing. Orbit has no specific shape where as orbital has. Orbits are like K , L , M ,N and orbitals are like S , P , D , F ,G | |
| 5114. |
What is empirical formula |
| Answer» formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms. | |
| 5115. |
Explain why atoms with half filled and completely filled configurations are extra stable? |
| Answer» Becoz due to half filling they have more no. Of exchange position as compared to other one and more is the exchange position more is the stability | |
| 5116. |
What is molecularmass of cr |
| Answer» Is 52 its not molecular mass ita molar massbecoz only Cr is not molecule<br>52<br>52.00 | |
| 5117. |
Hybridisation of C2H4 is? |
| Answer» | |
| 5118. |
How will be measure that electro negativity |
| Answer» Oxygen is the 2nd most electronegative element. When you examine a periodic table, you will find that (excluding the noble gases) the electronegativity values tend to increase as you go to the right and up. The reverse statement is that the values tend to decrease going down and to the left. | |
| 5119. |
what is the difference between lon pair and bond pair |
| Answer» | |
| 5120. |
What is the magnetic property of electron |
| Answer» | |
| 5121. |
Chemistry is difficult how should it be learnt |
| Answer» Chemistry is never hard if you want to learn than you can do better in your\u200b subject | |
| 5122. |
How would you react that nitrogen has 3.0 on Pauling scale |
| Answer» | |
| 5123. |
Why lithium is least reactive with water |
| Answer» First ionisaion energy of lithium is highest in the alkali earth metals. | |
| 5124. |
What are the failures of bohrs atomic model |
| Answer» | |
| 5125. |
VISEPR theory |
| Answer» | |
| 5126. |
How many moles of Zn(FeS2)2 can be made from 2g of Zn,3g of Fe and 4g of S |
| Answer» | |
| 5127. |
What is penetrating effect? |
| Answer» Penetration\xa0refers to how effectively electrons can get close to the nucleus. | |
| 5128. |
Explain Lewis structure in Hindi language vedio |
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| 5129. |
What is kjeldas method |
| Answer» | |
| 5130. |
Limitations of bohars model ,Rutherford model and pudding model |
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| 5131. |
What is a formula to calculate molality when density is given |
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| 5132. |
Why electron loose energy |
| Answer» When an electron is hit by a photon of light, it absorbs the quanta of energy the photon was carrying and moves to a higher energy state, but lifetime of electron to remain in higher energy state is very less and it loses energy and tends to reach it\'s original lower energy state.\xa0 | |
| 5133. |
What is molality,molarity? |
| Answer» Molality(m)It is the number of moles of the solute present in 1kg of the solventm= mass of solute(g)/molar mass of solute × 1000/mass of solvent (g)Molarity (M)It is the number of moles of solute dissolved in one litre of the solutionM= mass of solute (g)/ molar mass of solute × 1000/ Volume of solution(in mL)Hope this helps u...<br>Molarity\xa0(M) is defined as the number of moles of solute per liter of solution. Molality\xa0(m) is defined as the number of moles of solute per kilogram of solvent.<br>Molarity\xa0(M) is defined as the number of moles of solute per liter of solution.Molality\xa0(m) is defined as the number of moles of solute per kilogram of solvent. | |
| 5134. |
Why does oxygen not follow trend of decreasing atomic size across a period? |
| Answer» | |
| 5135. |
What is the conjugate base of OH- |
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| 5136. |
How can i learn all the formula easily |
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| 5137. |
What is fazan rule |
| Answer» The trend of attaining covalent character by ionic compounds as a consequence of polarisation may be generalized in terms of Fajan\'s rule.According to this rules an ion will be formed most easily when\tThe electron structure of the ion is stable,\tThe charge on the ion is small,\tA small atom forms the anion and a large atom forms the cation. | |
| 5138. |
Find energy of each of the photons whicha)corresponding to light of freqency 3 multiplied by 10^15 |
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| 5139. |
Which is more polar NH3 or H2O |
| Answer» | |
| 5140. |
Sir agar molecular mass me hum carbon ka atomic mass 12.011 na rakhkar 12 rakhde to shi rhe ga |
| Answer» | |
| 5141. |
Value of ridberg constant\xa0 |
| Answer» | |
| 5142. |
Why is electron gain enthalpy of flourine is less negative than that of chlorine? |
| Answer» Electron gain enthalpy is defined as the enthalpy change associated with an isolated gaseous atom when it gains an electron to form its corresponding anion.X(g) + e-\xa0---------> X-\xa0(g)General trend for variation of electron gain enthalpy down the group.On moving down the group the atomic size as well as nuclear charge increases. But the effect of increase in atomic size is much more pronounced than that of nuclear charge. Thus , the additional electron feels less attraction with the result electron gain enthalpy becomes less negative on going down the group.However in case of halogens , there happens to be an exception as given below.F = -328 kj /molCl = -349 kj /molBr = -325 kj /mol I = -295 kj / mol\xa0Electron gain enthalpy of F is less negative than Cl because of its smaller size. The additional electron in case of F will be added to 2p orbital , while in case of Cl it will go in the 3p orbital. as 2p orbital occupies a smaller region of space than that of 3p orbital, it will be more compact , due to which electron - electron repulsion would be more. Therefore, the incoming electron would be accepted with much less ease in case of F. Hence , its electron gain enthalpy is less negative than Cl. | |
| 5143. |
Among magnesium silicon and aluminum.. Which has highest ionisation energy?\xa0\xa0 |
| Answer» Ionization enthalpy is the energy required to remove the most loosely\xa0bound electron from an isolated atom (in the gaseous state) for one mole of an\xa0element.Among magnesium,\xa0silicon and aluminum, silicon\xa0has highest ionisation energy.\xa0Magnesium,\xa0aluminum and\xa0silicon are the elements of the third period in the periodic table.\xa0As one moves\xa0from left to right in the periodic table, there is a regular\xa0increase in the magnitude of ionization enthalpy of elements, with a few exceptions. E.g.\xa0The\xa0ionization enthalpy of Al (aluminium) is lower than that of Mg (magnesium).\xa0The first ionization enthalpy\xa0of magnesium\xa0is higher\xa0because the electron is removed from the fully filled \'s\' orbital.The first ionisation enthalpies of magnesium,\xa0aluminum and\xa0silicon\xa0are given below:-\tPeriod\xa0ElementFirst ionisation enthalpyElementFirst ionisation enthalpyElementFirst ionisation enthalpy3\xa0Magnesium\xa0737 kJ mol-1Aluminum577\xa0kJ mol-1Silicon786\xa0kJ mol-1\t | |
| 5144. |
Electronic configurstion of Re Rhenium (z=75). |
| Answer» {tex}1s^22s^22p^63s^23p^63d^{10}4s^24p^64d^{10}\\\\5s^25p^64f^{14}5d^56s^2{/tex} | |
| 5145. |
In 11.0 is 11 a significant figure or not and why |
| Answer» There are three rules on determining how many significant figures are in a number:\xa0\tNon-zero digits are always significant.\tAny zeros between two significant digits are significant.\tA final zero or trailing zeros in the decimal portion ONLY are significant.So keeping these rules in mind we can say that 11 is significant figure. | |
| 5146. |
What is screening effect\xa0 |
| Answer» Shielding effect can be defined as a reduction in the effective nuclear charge on the electron cloud, due to a difference in the attraction forces of the electrons on the nucleus. It is also referred to as the screening effect (or) atomic shielding. | |
| 5147. |
Why chlorine has higher electron gain enthalpy than fluorine\xa0 |
| Answer» Chlorine has higher electron gain enthalpy than fluorine because due to small size of fluorine some energy is utilized in overcoming the force of repulsion among electrons. Hence it has lesser value of electron affinity. | |
| 5148. |
Determine all of the quantum number for n=3? |
| Answer» | |
| 5149. |
Which of the following is acidic oxide?a)Na2Ob)MgOc)Caod)so2 |
| Answer» d) SO2 | |
| 5150. |
Which of the following is not a polymer?a)proteinb)FructoseC)Rubberd)Cellulose |
| Answer» b)Fructose | |