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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.
| 1101. |
What is amphoteric oxide? And write its reaction with acid and base |
| Answer» The oxide which shows both acidic and basic nature when reacted with acids and base. Eg Al2O3. Al2O3 + HCl ----> AlCl3 + H2O Al2O3 + NaOH ---->NaAlO2 + H2O In first reaction amphoteric oxide is reacted with acid in which it forms a salt and water. Similarly in second reaction it is reacted with a base in which it forms salt and water.<br>Oxides of metals which have both acidic as well as basic behaviour are known as amphoteric oxidesExample:- Acidic medium :-Al2O3+6HCl---> 2AlCl3+3H2OBasic medium :- Al2CO3+2NaOH---> 2NaAlO2+H2O | |
| 1102. |
Why hydrogen peroxide is better than oxidizing agent than water? |
| Answer» Since ,The production of O2 atom make H2O2 is good oxidising agent than water (H2O).. | |
| 1103. |
Define oxidation number???? |
| Answer» It is the charge on the atom or molecule of an ion. It can be zero and in fraction also. It is different for an atom in different compounds | |
| 1104. |
What is Maxwell\'s distribution of velocities? |
| Answer» Hope this will help u<br>The Maxwell-Boltzmann equation, which forms the basis of the kinetic theory of gases, defines the distribution of speeds for a gas at a certain temperature. From this distribution function, the most probable speed, the average speed, and the root-mean-square speed can be derived. | |
| 1105. |
What is the Microscopic Model of a Gas? |
| Answer» Molecular Model of an Ideal Gas A microscopic model of an ideal gas The pressure that a gas exerts on the walls of its container is a consequence of the collisions of the gas molecules with the walls. ... The molecule has velocity components vx , vy , and vz . Hope this will help you | |
| 1106. |
What is practical significance of Boyle\'s Law? |
| Answer» Significance / Importance of Boyle\'s Law. According to Boyle\'s law, at constant temperature the density of gas is directly proportional to pressure. This is because density depends on volume, smaller the volume higher the density. So when pressure is applied, volume is reduced i.e. density is increased. | |
| 1107. |
Define molecular orbitals?? |
| Answer» : A molecular orbital is an orbital or of a molecule\'s electron. Electrons around a molecule can be associated with more than one atom and are often expressed as a combination of atomic orbitals.... ☺️hope this help you | |
| 1108. |
The following set of quantum numbers is not possible. Explain why?n=2, l=3, m=-3, m=+1/2 |
| Answer» l = n-1 so it becomes m = 1 accordingly m changes as m = -l to +l it becomes m = -1 or 0 or +1 | |
| 1109. |
What is anti markownikovs rules |
| Answer» For clearing this dout always remember make poor richer<br>Antimarkovnikov\'s rule:According to this rule the addition of HX is exactly opposite to that of Markovnikov\'s rule.As per this rule, the halide ion gets added to the less substituted doubly bonded carbon atom. | |
| 1110. |
Why Be3+ does not form ionic compound or halides |
| Answer» Since electronic configuration of Be is : 1s^2 2s^2 . If it looses elctrons it will only form Be2+ ion and to form Be 3+ a large amount of ionization enthalpy will be needed. | |
| 1111. |
Calculate [H3o+] and [OH-] for blood serum, the pH of which is 7.4. |
| Answer» | |
| 1112. |
All important questions of some basic concepts of class Xl |
| Answer» Mole concept,laws of.chemical.combination,stoichiometeric calculations,molarity,molality | |
| 1113. |
What is ( n+l) rule |
| Answer» i dont know<br>The rule is based on the total number of nodes in the atomic orbital, n + ℓ, which is related to the energy. In the case of equal n + ℓ values, the orbital with a lower n value is filled first. | |
| 1114. |
What is zeemen effect |
| Answer» The Zeeman effect is the splitting of the spectral lines of an atom in the presence of a strong magnetic field. The effect is due to the distortion of the electron orbitals because of the magnetic field. The (normal) Zeeman effect can be understood classically, as Lorentz predicted.<br>The splitting of a spectrum line into several component by application of magnetic field is called zeeman effect | |
| 1115. |
Sandmeyer\'s reaction? |
| Answer» | |
| 1116. |
Sugar is soluble in water though it is a covalent compound.why? |
| Answer» Sucrose is a sugar and if you look at its structure there are a lot of OH groups these groups hydrogen bond to water and help to form a solvation sphere around the molecule. Ethanol has only one OH group it is less polar than water. There is a general adage that like dissolves in like, sucrose is polar, water is polar and so they dissolve, ethanol is less polar and so less like and therefore does not dissolve. | |
| 1117. |
Difference b/n orbits and orbitals? At least 3 -4 points. |
| Answer» | |
| 1118. |
Molecular orbitol diagram of O2 ,N2 |
| Answer» In this app pic upload is not available .so MOT is only draw in note book | |
| 1119. |
Solution for the reaction p4+OH-=pH3+HPO2- |
| Answer» | |
| 1120. |
O lCH3-C-O-COH |
| Answer» | |
| 1121. |
Definition of kjeldahl\'s method |
| Answer» | |
| 1122. |
How are 0.5m NaOH and 0.5M are differ from each other |
| Answer» Here m= molalityM=molarity and both are different | |
| 1123. |
What happens when boric acid is heated |
| Answer» Boric acid on heating above 170C gives metaboric acid, which on further heating above 300C gives tetraboric acid (or boric acid). Boric acid may sometimes refer to any of these acids. On further heating gives boron trioxide.\xa0 | |
| 1124. |
Which will have higher boiling point : a non polar compund or polar?? .. why ?? |
| Answer» Because of weak vanderwaal forces<br>A non polar molecule | |
| 1125. |
Give 1to 10 name reaction |
| Answer» | |
| 1126. |
Explain why odd cummelenes do not form optical isomers? |
| Answer» Cumelenes means alkenes having odd number of double bonds...For optical activity we will need chiral carbon and it is sp3 hybridised but the carbon of cumelenes are not sp3 hybridised hence they are not optical active | |
| 1127. |
What is specific rotation and optical purity?? |
| Answer» | |
| 1128. |
Which is most radioactive alkali metal ? |
| Answer» Francium Fr<br>Francium | |
| 1129. |
How acetylene react with methyl alchol? |
| Answer» | |
| 1130. |
How many total structural isomerism are possible for the given molecular formula C7 h 16 |
| Answer» I think 8 ..... | |
| 1131. |
Cu dissolve in Hno3 but not in hcl explain |
| Answer» Nitric acid reacts with copper because of the nitrate ion. It is the nitrate ion that causes the copper to dissolve, not the H . There is no reaction between copper and HCl because neither H nor Cl is able to react with the metal. | |
| 1132. |
Calculate the volume occupied by 2 mole of N2 gas at pressure 380mm of Hg and temperature |
| Answer» | |
| 1133. |
What is nitroso???????? |
| Answer» Nitroso refers to a functional group in organic chemistry which has the NO group attached to an organic moiety. As such, various nitroso groups can be categorized as C-nitroso compounds, S-nitroso compounds, N-nitroso compounds, and O-nitroso compounds. | |
| 1134. |
What is the hybridisation of central atom in H3O+,XeF2,XeF4 |
| Answer» hybridization of XeF4 :sp3d2hybridization of XeF2 :sp3dhybridization of H3O+ : sp3 | |
| 1135. |
Kya hai pLutiion |
| Answer» | |
| 1136. |
Write the ajumption of kinetic theory of gas |
| Answer» \tAll gases are made up of molecules which are constantly and persistently moving in random directions.\tThe separation between the molecules is much greater than the size of molecules.\tWhen a gas sample is kept in a container, the molecules of the sample do not exert any force on the walls of the container during the collision.\tThe time interval of collision between two molecules, and between a molecule and the wall is considered to be very small.\tAll the collisions between molecules and even between molecules and wall are considered to be elastic.\tAll the molecules in a certain gas sample obey Newton’s laws of motion.\tIf a gas sample is left for a sufficient time, it eventually comes to a steady state. The density of molecules and the distribution of molecules are independent of position, distance and time. | |
| 1137. |
What is amphoteric substance |
| Answer» Substances which can act both as acids, as well as bases, are called amphiprotic or amphoteric substances. When we look just at Bronsted-Lowry acids and bases we can also talk about amphiprotic substances which are a special type of amphoteric substances.<br>In chemistry, an amphoteric compound is a molecule or ion that can react both as an acid and as a base. Many metals (such as copper, zinc, tin, lead, aluminium, and beryllium) form amphoteric oxides or hydroxides. ... | |
| 1138. |
Blue print for final exam |
| Answer» It will differ for each and every school | |
| 1139. |
Can Anybody tell me What is olefin ??? |
| Answer» Thanks for the answer ayushi mujhe bhi ye nahi pata tha answer<br>Olefin, also called alkene, compound made up of hydrogen and carbon that contains one or more pairs of carbon atoms linked by a double bond. | |
| 1140. |
The molar enthalpy of vaporization of acetone is less than of water . Why? |
| Answer» Acetone\xa0does not have hydrogen bond, and thus intermolecular forces are comparatively weaker which makes it boil/evaporates fast, thus reducing the molar enthalpy of vaporization. Also, Acetone does not polar O-H bond contributing to low enthalpy.\xa0Water has non-polar region and also has strong hydrogen bond. Water has highly polar O-H bond which makes water boil at relatively higher temperature than acetone thus has enthalpy greater than that of acetone. | |
| 1141. |
Pls tell what book can i prefer for neet and jipmer |
| Answer» U can go for last 36 years jee and neet question book, and u can also go for modern abc or pradeep or s.l arora.... | |
| 1142. |
what is equlibrium constant |
| Answer» Law of mass action also forms the basis which states that the rate of a chemical reaction is directly proportional to the product of the concentrations of the reactants raised to their respective stoichiometric coefficients. Therefore, given the reaction –\xa0aA(g) + bB(g) ⇔\xa0cC(g) + dD(g)By using the law of mass action here,\xa0\tThe forward reaction rate would be\xa0k+\xa0[A]a[B]b\tThe backward reaction rate would be\xa0k–\xa0[C]c[D]d\xa0where, [A], [B], [C] and [D] being the active masses\xa0and\xa0k+\xa0and\xa0k−\xa0are\xa0rate constants of forward and backward reactions, also the a, b, c, d are the stoichiometric coefficients related to A, B, C and D respectively. However, at the equilibrium – the forward and the backward rates are equal, stating –\xa0Rate of forward reaction = Rate of backward reactionor,\xa0or,\xa0where,\xa0Kc\xa0is the equilibrium constant expressed in terms of the molar concentrations. The equation\xa0Kc\xa0= [ C ]c·[ D ]d\xa0/ [ A ]a·[ B ]b\xa0or, Kc\xa0= Kf\xa0/ Kb\xa0is the Law of Chemical Equilibrium.\xa0The equilibrium constant is therefore related to the standard Gibbs free energy change for the reaction which is stated by the equation –§Gº= -RT ln Keqwhere T states the temperature, R is the universal gas constant and Keq\xa0is the equilibrium constant. | |
| 1143. |
What does you mean by thermodynamics system? |
| Answer» ???<br>Nice ankit sir<br>Hope this will help u<br>A thermodynamic system is a group of material and/or radiative contents. Its properties may be described by thermodynamic state variables such as temperature, entropy, internal energy, and pressure. ... The thermodynamic state of a thermodynamic system is its internal state as specified by its state variables. | |
| 1144. |
What is electronic confirgration |
| Answer» The distribution of electrons in orbitals is known as electronic configuration.<br>The structure of atom in which electron revolves around nucleas.. Is known as electronic configuration. | |
| 1145. |
why He2 does not exist? |
| Answer» Wlcm<br>Thanks for the answer priya<br>Helium and the other inert gases have completely filled octets, and so they have zero valency. That means, their combining capacity is zero, and so they exist as monatomic molecules such as He, Ne, Ar etc.Helium atom has the electronic configuration 1s2. According to the molecular orbital theory, in a supposed He2 molecule, both the bonding and the antibonding orbitals will have 2 electrons each. And so, the bond order (half the difference in the numbers of bonding and antibonding electrons) for such a diatomic entity is zero. That means, the He2 molecule has no existence. | |
| 1146. |
What would be the IUPAC name and symbol for elements with atomic number 122 , 127 , 135 |
| Answer» 122-Unbibiium 127-unbiheptium 135- untripentium | |
| 1147. |
But-2-ene |
| Answer» CH3-CH=CH-CH3<br>If structure.......then sorry i can\'t help u .......Gaurav seth......can help u in this question.....???<br>What do u want to ask???????? | |
| 1148. |
What is the Effect of temp on equi. Constt |
| Answer» V good answer ayushi<br>This is typical of what happens with any equilibrium where the forward reaction is exothermic. Increasing the temperature decreases the value of the equilibrium constant. Where the forward reaction is endothermic, increasing the temperature increases the value of the equilibrium constant. | |
| 1149. |
What do you know about nuclear |
| Answer» Everything around you is made up of tiny objects called atoms most of the mass of each atom is concentrated in center(which is called nucleus). nuclear reactor produce just under 20% of the electricity in the USA there are over 400 power reactors in the world.they produce base-load electricity 24/7 without emitting pollutants. | |
| 1150. |
What do you know about nuclean |
| Answer» | |