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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.
| 4951. |
Why do we need to classify elements |
| Answer» We classify elements to make the study of elements easy and also for systematic study. | |
| 4952. |
Why the balloon bursts when we squeeze it??? |
| Answer» It all due to the pressure exerted by the nunber of particles and also bcz decrease in volume leads increase in pressure that\'s why a balloon fully filled with gaseous particle burst after compression | |
| 4953. |
What is bhor model of atom |
| Answer» | |
| 4954. |
If Pressure is constant,at what Temperature would the volume of gas be two times its volume at 0°C. |
| Answer» | |
| 4955. |
What are the important topics in chemical bonding and molecular structure chapter? |
| Answer» | |
| 4956. |
What is electromagnetic wave theory? |
| Answer» According to maxwell all electron magnetic wave/radiation are same | |
| 4957. |
Vsper of c3h6 |
| Answer» | |
| 4958. |
Explain isotherms of co2 |
| Answer» When a gaseous system is transformed to its liquid state, there is a tremendous decrease in the volume. This decrease in volume can be effectively brought about by lowering of temperature, or by increasing pressure (or) by both. In both these effects the gaseous molecules come closer to each other and experience an increase in force of attraction which results in liquefaction of gases. At any constant temperature when pressure is increased volume is decreased and vice versa. Such P-V curves at constant temperature are known as isotherms.The importance of critical temperature of a gas was first discovered by Andrews in his experiments on pressure - volume isotherms of carbon dioxide gas at a series of temperature. The isotherm of carbondioxide determined by him at different temperaturesCritical temperature (Tc) : It is defined as the characteristic temperature of a gas at which increase in pressure brings in liquefaction of gas above which no liquefaction occurs although the pressure may be increased many fold. For instance Tc of CO2 is 31.1 o C. This means that it is not possible to liquefy CO2 by applying pressure when its temperature is above 31.1 o C. | |
| 4959. |
Which is more stable1)H2+2)H+3)H-4)H |
| Answer» 1 | |
| 4960. |
What are momentary dipoles? |
| Answer» | |
| 4961. |
Total number of lone pairs in N2O3?how? |
| Answer» ShalilendraDraw lewis dot str. of N2O3THEN U WILL GET ANS. | |
| 4962. |
Ph of lime water value |
| Answer» | |
| 4963. |
Cn u explain me the concept of thermodynamics |
| Answer» | |
| 4964. |
Write ideal gas equation for one mole gas. |
| Answer» PV=RT for one mole of a gas | |
| 4965. |
Calculate the number of protons and neutrons in 8035Br. |
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| 4966. |
Define law of multipul propotion. |
| Answer» | |
| 4967. |
What are the nesscery conditions for resonance |
| Answer» In chemistry, resonance or mesomerism is a way of describing delocalized electrons within certain molecules or polyatomic ions where the bonding cannot be expressed by one single Lewis structure.Contributing structures differ only in the position of electrons, not in the position of nuclei.Electrons have no fixed position in atoms, compounds and molecules , but have probabilities of being found in certain spaces (orbitals). Resonance forms illustrate areas of higher probabilities (electron densities). The term Resonance is applied when there are two or more possibilities available. Resonance structures do not change the relative positions of the atoms For a compound to show resonating structures , it should1) have a planar structure2) follow Hackel\'s rule of electron numbers3) hybridization remains same and fixed4) no of lone pairs remain same . | |
| 4968. |
Why lowest energy orbital more stable? |
| Answer» A molecule will be stable if there are more attractive forces and less repulsive forces.Attractive forces lower the potential energy of the molecule and repulsive forces increase the potential energy of the molecule.Therefore molecules with lower energy are more stable.This is used in energy minimization to determine the most stable conformation of a molecule, most stable structure of a molecule etc.It is also used in binding studies to determine the most stable interaction between a substrate/ligand/drug and the enzyme. | |
| 4969. |
What is difference between entropy and enthalpy |
| Answer» Entropy is property where as enthalpy is energy.Entropy is function of quantity of heat, the property of the system which decides the percentage of heat that can be converted into work. Entropy shows the randomness of molecules.If the randomness of molecules is more, then the increase in entropy in a process will be more, hence the percentage of heat that can be converted into work will be less. In other words, entropy is a function of quantity of heat.Enthalpy is energy, the sum of internal energy and flow energy is called as enthalpy. | |
| 4970. |
What is full form of VSEPR theory? |
| Answer» Valance shell electron pair repulsion Theory | |
| 4971. |
Who discovered elevtron |
| Answer» J.J.ThomsonThe particle that J.J.Thomson discovered in 1897, the electron.<br>j.j. thomson. | |
| 4972. |
What is acyl hallide |
| Answer» An acyl halide (also known as an acid halide) is a chemical compound derived from an oxyacid by replacing a hydroxyl group with a halide group.If the acid is a carboxylic acid, the compound contains a –COX functional group, which consists of a carbonyl group singly bonded to a halogen atom. The general formula for such an acyl halide can be written RCOX, where R may be, for example, an alkyl group, CO is the carbonyl group, and X represents the halide, such as chloride. Acyl chlorides are the most commonly encountered acyl halides, but acetyl iodide is the one produced (transiently) on the largest scale. Billions of kilograms are generated annually in the production of acetic acid. | |
| 4973. |
Physical classification of matter |
| Answer» Solid , liquid, gas | |
| 4974. |
CH3COOH Find number of c-c sigma bonds |
| Answer» CH3\xa0-COOH No\xa0OF C-C sigma bond 1\xa0\xa0 | |
| 4975. |
What are quontam numbers |
| Answer» It is a set of four numbers which complete information about an electron i.e.its Energy, shape, orientation and spin. | |
| 4976. |
A mercury column with a |
| Answer» | |
| 4977. |
What is shape atomic orbitals and how do we draw them |
| Answer» According to quantum atomic model, an atom can have many possible numbers of orbitals. These orbitals can be categorized on the basis of their size, shape or orientation. A smaller sized orbital means there is a greater chance of getting an electron near the nucleus. The orbital wave function or ϕ is a mathematical function used for representing the coordinates of an electron. The square of the orbital wave function or represents the probability of finding an electron. This wave function also helps us in drawing boundary surface diagrams. Boundary surface diagrams of constant probability density for different orbitals help us understand the shape of orbitals. Let us represent the shapes of orbitals with the help of boundary surface diagrams:Determination of shapes of orbitals:S-orbital: Boundary surface diagram for s orbital looks like a sphere having nucleus as its center which in two dimensions can be seen as a circle. Hence, we can say that s-orbitals are spherically symmetric having probability of finding the electron at a given distance equal in all the directions. The size of the s orbital is also found to increase with increase in the value of principle quantum number (n),thus, 4s > 3s> 2s > 1s.S OrbitalP-orbitals: Each p orbital consists of two sections better known as lobes which lie on either side of the plane passing through the nucleus. The three p orbitals differ in the way the lobes are oriented whereas they are identical in terms of size shape and ener | |
| 4978. |
How to find electronegativity? |
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| 4979. |
What is Lothar Mayer\'s Volume Curves? |
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| 4980. |
Is a CuSO4.5H2O a compound or mixture? &why? |
| Answer» It is a compound. Because mixture consists of two different types of compound | |
| 4981. |
What are the Balmer,Lyman,etc. tells us about? |
| Answer» This town Sajan related to the hydrogen spectrum of chapter number 2 of chemistry1. When the hydrogen spectrum was recorded the ground state of atom moves toward excited state and when they return back from the excited state to the ground state again the spectrum was recorded.2. Gradually it was fine that it was line spectrum and divided into 5 series and this is our Lyman ,balmar,pachan,bracket,p-fund.3. The ground state for lyman was 1 and excited state was two and three and its region is UV . The ground state of Balmer is too and excited status 3, 4 and 5 and its region is visible. Ground state for class 10 history and excited state is 5, 6 and region is Infrared. For brackett ground state is 4 and excited states five, six and reason is InfraredFor p fund excited status 6 and 7 and ground status 5 with infrared region | |
| 4982. |
unit of molar specific heat |
| Answer» Joule per Kelvin per mass | |
| 4983. |
DOES WE USE SALT BRIDGE IN LABS TILL NOW. |
| Answer» Ya of course your soul bridges in these days also because it help us to maintain the electroneutrality principle | |
| 4984. |
Why atoms combine to form chemical bond? |
| Answer» To become octet<br>TO STABELIZE THEIR OCTET | |
| 4985. |
Li salts are predominantly covalent while Na salts are predominantly ionic. Explain. |
| Answer» answer | |
| 4986. |
Derivation of vander waals equation |
| Answer» | |
| 4987. |
What is Metaphorism give example |
| Answer» | |
| 4988. |
Why do we classify elemets ? Give the answer in simple language |
| Answer» For making easy and systematic study of element<br>Classification of elements helps in:\tSystematic study of the properties of elements.\tit is Easy to understand and remember the properties of elements. | |
| 4989. |
Define the formal charge ?how to calculate that |
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| 4990. |
Define a neutral oxide |
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| 4991. |
Why are the noble gases poor chemical reactants? |
| Answer» The noble gases are the chemical elements in group 18 of the periodic table. They are the most stable due to having the maximum number of valence electrons their outer shell can hold. Therefore, they rarely react with other elements. | |
| 4992. |
What is the mean of mole concept |
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| 4993. |
How to prepare q. during exam time? |
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| 4994. |
What are factors which effect ionic charge? |
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| 4995. |
Atomic number of Ag |
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| 4996. |
What are the cause of stability of half filled and full filled orbital? |
| Answer» In certain elements when the 2 subshell differ slightly in their energies, an electron may shift from a subshell of lower energy to a subshell of higher energy only if such a shift results in the symmetrical distribution (either completely filled or exactly half filled ) of the electrons in the various orbitals of the subshell of higher energy.... | |
| 4997. |
How I get moles |
| Answer» | |
| 4998. |
Why wave function is called orbital wave function? |
| Answer» They are mathematical functions used to describe the wave like properties of the electrons in an atom. They represent the regions where the probability of finding an electron is maximum around the nucleus of the atom. These are also called as atomic orbitals that are represented by 3 quantum numbers: n(principal quantum number), l(azimuthal quantum number) and m(magnetic quantum number). These quantum numbers are used to specify the electron\'s energy, location and angular momentum. | |
| 4999. |
Hybridisation |
| Answer» | |
| 5000. |
what is electron gain enthalpgy |
| Answer» Electron Gain Enthalpy is the energy released when one mole of electron are added to gaseous atoms of an element. Electron Affinity is the same as Electron Gain Enthalpy but viewed as the energy supplied to the surroundings rather than that released by the atoms. Hence its sign is opposite from the latter.<br>The amount of energy released when electron is added to a shell. | |