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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.
| 2701. |
Convert ethane to ethyne |
| Answer» | |
| 2702. |
What is molecular orbital theory (MOT] |
| Answer» Molecular orbital theory states that after forming molecule, electrons do not continue to revolve in atomic orbitals rather they start revolving in newly formed molecular orbitals which are around two or more nuclei of the participant atoms. It also explains the paramagnetic, diamagnetic properties as well as existence of some Diatomic molecules. | |
| 2703. |
In the hydrocarbon CH3− CH2−CH = CH − CH2−C ≡ CH |
| Answer» | |
| 2704. |
Formula of boric acid |
| Answer» H3BO3 | |
| 2705. |
Energy level diagram of oxygen |
| Answer» | |
| 2706. |
Aaufbau principle |
| Answer» In ground state of atoms the orbitals are filled in order to their increasing energies<br>The principle states that : In ground state of atoms, the orbitals are filled in order to their increasing energies . | |
| 2707. |
What is aaufbau |
| Answer» The principle states that : In ground state of atoms, the orbitals are filled in order to their increasing energies | |
| 2708. |
How atom are a molucule |
| Answer» | |
| 2709. |
Position of hydrogen in periodic table |
| Answer» There is no fixed position of hydrogen since it shows properties of both halogen and alkali metals.Thus it is kept seperately in up of periodic table.<br>Hydrogen shows properties of halogen as well as of alkali metals.<br>There is no fixed position for hydrogen | |
| 2710. |
kal ke paper mai kya aega? |
| Answer» Jo manjure Sir hoga<br>Ask to god | |
| 2711. |
Charles law? |
| Answer» At constant pressure the volume of a given mass of a gas is directly proportional to temperature.<br>At constant volume and numbers of molecule:V is directly proportional to TV1/T1=V2/T2<br>V1/T1=V2/T2 | |
| 2712. |
Define vb theory |
| Answer» According to the valence bond theory,Electrons in a molecule occupy atomic orbitals rather than molecular orbitals. The atomic orbitals overlap on the bond formation and the larger the overlap the stronger the bond | |
| 2713. |
What are chemical bonding |
| Answer» Attraction between two or more atoms , ions to form chemical compound | |
| 2714. |
what is titration reaction? |
| Answer» Titration, process of chemical analysis in which the quantity of some constituent of a sample is determined by adding to the measured sample an exactly known quantity of another substance with which the desired constituent reacts in a definite, known proportion. | |
| 2715. |
Experiment of purification of impure sample by crystallization |
| Answer» The procedure of crystallization of copper sulphate. | |
| 2716. |
Laboratory apparatus?? |
| Answer» Tools required for an complete lab which includes ( watch glass, beaker,spatula). | |
| 2717. |
Explain the formation of cl2 molecule on the basis of valence bond theory |
| Answer» | |
| 2718. |
How to prepare alkenes from vicinal dihalide ? |
| Answer» React vicinal dihalide with zinc metal... | |
| 2719. |
Can anyone suggest me topic to prepare projects on chemistry.. |
| Answer» Mohr\'s Salt Experiment.Preparation of Toilet Soap.How to make a smoke bomb?Acidity in Tea.Analysis of Honey.Catalytic Decomposition.Hess\' Law and Thermochemistry.Effect of Heat on Vitamin C in Tomatoes. | |
| 2720. |
How many Practicals are there in chemistry this year? |
| Answer» Depends on the teacher..although many topics of practicals has also been reduced | |
| 2721. |
Which of the following will have the most electron gain enthaly? P, S, Cl, F |
| Answer» f<br>F | |
| 2722. |
What is fitting reaction |
| Answer» Good | |
| 2723. |
Why water drops r spherical in shape??? |
| Answer» Due surface tention water drops are spherical in shape because the try to cover minimum surface area . | |
| 2724. |
Why water has bent structure? |
| Answer» Hydrogen bon8<br>Liquid | |
| 2725. |
What is the hybridisation of becl2 in solid state |
| Answer» Sp- linear geometry | |
| 2726. |
What is innert pair effect |
| Answer» U r from which school? | |
| 2727. |
Define kolbe\'s reaction |
| Answer» Phenoxide ion generated by treating phenol with sodium hydroxide is even more reactive than phenol towards electrophillc aromatic substitution with carbon dioxide, a weak Electrophill. Ortho Hydroxybenzanoic acid is formed as the main reaction product | |
| 2728. |
How do we know the its a basic medium or acidic mediun while doing balancing ?? |
| Answer» it will be written in the question or in the product or reactant side ,H+(acidic medium) or OH- (basic medium) will be written. | |
| 2729. |
Tetravslance of carbon |
| Answer» | |
| 2730. |
Practical for test of NH4 |
| Answer» Methene is spherical solide<br>Plz tell answer | |
| 2731. |
Is molar and molecular masses are different if yes then How? |
| Answer» Yes they both are differentMolar mass is the mass of one molar of an element/a molecule which is expressed is grams whereas molecular mass is the mass of its content which is expressed in \'amu\'. For example, carbon\'s molecular mass is 12 amu but its molar mass is 12 g/mol | |
| 2732. |
Hybridisation of PCl5 |
| Answer» Hybridization of PCl5 is sp3d because it have 4 sigma bond<br>I want proper solution<br>5 plus | |
| 2733. |
dipole moment of mn2+ |
| Answer» For dipole moment minimum two atom required | |
| 2734. |
For the R&N 2Nh3 =N2+3H2 , delta U = 456KJ Calculate delta n for the R&N |
| Answer» What is a rational number<br>Delta n is 34 | |
| 2735. |
Can anyone tell me the IUPAC name for this compound ch2-ch2-ch=ch2, please? |
| Answer» the compound given is CH2-CH2-CH=CH2 so the name is But-1-ene or Butene<br>Sorry answer is Pent-1-ene<br>But-2-ene<br>This compound is wrong.The right compound is CH3 - CH2-CH=CH2.And it\'s IUPAC Name is Pent-1-ene | |
| 2736. |
Bind formation |
| Answer» | |
| 2737. |
What is electro magnetic spectrum |
| Answer» The electromagnetic spectrum is the range of frequencies of electromagnetic radiation and their respective wavelengths and photon energies. | |
| 2738. |
Iso electronic configuration |
| Answer» Species having same no. Of electron are called isoelectronic eg. Na3- ,O2-,Mg2+<br>?? | |
| 2739. |
What is discovery of the atoms ?? |
| Answer» Hi kaise ho sab<br>Hi ?, How are you , sb kha pr ha<br>?? ????? | |
| 2740. |
Find out the principal and azimuthal quantum number of least electron of MG 12 |
| Answer» | |
| 2741. |
Oxygen is dimagnetic or paramagnetic? ? |
| Answer» Paramagnetic<br>Unlair electrons means 1 spin and it looks for another spin and interact with magnetic fields<br>Paramagnetic<br>We can explain the paramagnetic nature of oxygen molecule by molecular orbital theory.When you draw molecular orbital diagram of\xa0O2\u200bwe can see there are two unpaired electrons are present in the last molecular orbital which shows us that it is paramagnetic in nature.<br>Paramagnetic | |
| 2742. |
Convert acetic acid to ethylene |
| Answer» to convert acetic acid to ethane Lets convert this acetic acid to ammonium acetate then from that we can convert it to Acetamide and form that it can be converted to acetonitrile.Now from acetonitrile it can easily converted to any X-CH3 where X is a halogen and from that X-CH3 it can be converted to ethane by wurtz reaction beacuase ethane has even number of carbon atom.1.CH3COOH→CH3COONH42. CH3CONH4→CH3CONH23. CH3CONH2→CH3CN4. CH3CN+KBr→CH3Br5. CH3Br+2Na+BrCH3→CH3-CH3+2NaBrHere in Reaction1) NH3 is added with heat.2)P2O5 is added with heat.3)P2O5 is added with heat4)its an nucleophilic substitution reaction.5)its called wurtz reaction. | |
| 2743. |
Convert ethylene to ethane |
| Answer» | |
| 2744. |
Tricks to remember the decreasing priorities of functional groups. |
| Answer» Gud eve dono ko?? | |
| 2745. |
All dimension formula |
| Answer» Dimensional Formulas for Physical QuantitiesPhysical quantityUnitDimensional formulaAcceleration or acceleration due to gravity ms–2 ,LT–2,Angle (arc/radius)rad,MoLoTo ,Angular displacementrad,MoloToAngular frequency (angular displacement/time)rads–1T–1Angular impulse (torque x time)NmsML2T–1Angular momentum (Iω)kgm2s–1ML2T–1Angular velocity (angle/time)rads–1T–1Area (length x breadth)m2L2Boltzmann’s constantJK–1ML2T–2θ–1Bulk modulus (\\Delta P.\\frac{V}{\\Delta V}ΔP.ΔVV\u200b.)Nm–2, PaM1L–1T–2Calorific valueJkg–1L2T–2Coefficient of linear or areal or volume expansionoC–1\xa0or K–1θ–1Coefficient of surface tension (force/length)Nm–1\xa0or Jm–2MT–2Coefficient of thermal conductivityWm–1K–1MLT–3θ–1Coefficient of viscosity (F =\\eta A\\frac{dv}{dx}ηAdxdv\u200b)poiseML–1T–1Compressibility (1/bulk modulus)Pa–1, m2N–2M–1LT2Density (mass / volume)kgm–3ML–3Displacement, wavelength, focal lengthmLElectric capacitance (charge/potential)CV–1, faradM–1L–2T4I2Electric conductance (1/resistance)Ohm–1\xa0or mho or siemenM–1L–2T3I2Electric conductivity (1/resistivity)siemen/metre or Sm–1M–1L–3T3I2Electric charge or quantity of electric charge (current x time)coulombITElectric currentampereIElectric dipole moment (charge x distance)CmLTIElectric field strength or Intensity of electric field (force/charge)NC–1, Vm–1MLT–3I–1Electric resistance (\\frac{potential\\text{ difference}}{current}currentpotential\xa0difference\u200b)ohmML2T–3I–2Emf (or) electric potential (work/charge)voltML2T–3I–1Energy (capacity to do work)jouleML2T–2Energy density (\\frac{energy}{volume}volumeenergy\u200b)Jm–3ML–1T–2Entropy (\\Delta S=\\Delta Q/TΔS=ΔQ/T)Jθ–1ML2T–2θ–1Force (mass x acceleration)newton (N)MLT–2Force constant or spring constant (force/extension)Nm–1MT–2Frequency (1/period)HzT–1Gravitational potential (work/mass)Jkg–1L2T–2Heat (energy)J or calorieML2T–2Illumination (Illuminance)lux (lumen/metre2)MT–3Impulse (force x time)Ns or kgms–1MLT–1Inductance (L) (energy =\\frac{1}{2}L{{I}^{2}}21\u200bLI2) orcoefficient of self-inductionhenry (H)ML2T–2I–2Intensity of gravitational field (F/m)Nkg–1L1T–2Intensity of magnetization (I)Am–1L–1IJoule’s constant or mechanical equivalent of heatJcal–1MoLoToLatent heat (Q = mL)Jkg–1MoL2T–2Linear density (mass per unit length)kgm–1ML–1Luminous fluxlumen or (Js–1)ML2T–3Magnetic dipole momentAm2L2IMagnetic flux (magnetic induction x area)weber (Wb)ML2T–2I–1Magnetic induction (F = Bil)NI–1m–1\xa0or TMT–2I–1Magnetic pole strength (unit: ampere–meter)AmLIModulus of elasticity (stress/strain)Nm–2, PaML–1T–2Moment of inertia (mass x radius2)kgm2ML2Momentum (mass x velocity)kgms–1MLT–1Permeability of free space (\\mu_o = \\frac{4\\pi Fd^{2}}{m_1m_2}μo\u200b=m1\u200bm2\u200b4πFd2\u200b)Hm–1\xa0or NA–2MLT–2I–2Permittivity of free space ({{\\varepsilon }_{o}}=\\frac{{{Q}_{1}}{{Q}_{2}}}{4\\pi F{{d}^{2}}}εo\u200b=4πFd2Q1\u200bQ2\u200b\u200b.)Fm–1\xa0or C2N–1m–2M–1L–3T4I2Planck’s constant (energy/frequency)JsML2T–1Poisson’s ratio (lateral strain/longitudinal strain)––MoLoToPower (work/time)Js–1\xa0or watt (W)ML2T–3Pressure (for | |
| 2746. |
First organic compound |
| Answer» ammonium cyanate<br>Urea | |
| 2747. |
Mandeleevs periodic table |
| Answer» He examined the relationship between atomic weights of the elements and their physical and chemical properties.Among chemical properties,\xa0Mendeleev mainly concentrated on the compounds formed by the elements with hydrogen and oxygen\xa0because they are highly reactive and hence formed compounds with almost all the elements.The formulae of the hydrides and oxides formed by the various elements was made the basis of classification of elements.Mendeleev\xa0in 1869, proposed\xa0periodic law.It states thatThe physical and chemical properties of elements are a periodic function of their atomic weights i.e. when the elements are arranged in order of their increasing atomic weight, elements with similar properties are repeated after certain regular intervals. This repetition of properties of elements after certain regular intervals is called\xa0periodicity of properties.Characteristics of Mendeleev’s periodic table1)Mendeleev’s arranged the then known elements in order of their increasing atomic weights, grouping together\xa0elements with similar properties and leaving out blank space wherever necessary.2)He also made the prediction that there were some unknown elements which, would be discovered in due course of time and would fill these blank spaces.3)He predicted their properties in the light of the properties of the other elements in the same group. Later on, these unknown elements were discovered and were found to possess exactly the same properties as predicted by Mendeleev.4)Noble gases were not known at the time of Mendeleev. When these gases were discovered, a new group called the\xa0zero group\xa0was added toMendeleev\xa0original periodic table.5)Two group of 14 elements each, called\xa0lanthanides and actinides\xa0were placed at the bottom of the periodic table.6)Mendeleev’s periodic table consists of :periodsa) 9 vertical columns called\xa0groups. These are designated as 0,\xa0,\xa0,\xa0,\xa0,,\xa0\xa0,\xa0,\xa0b) Except for group 0 and\xa0\xa0,each group is further divided into two subgroup designated as A and B.The elements which lie on the left hand side of each group constitutes sub-group A while those placed on the right hand side from sub-group B.This subdivision is made on the basis of the differences in their properties.c)Group\xa0contains 9 elements in three sets each containing three elements. Group 0 has no subgroup. It consists of only one vertical column of inert gases.d)7 horizontal rows called\xa0periods.These are numbered from 1 to 7. | |
| 2748. |
Which experiment led to the discovery of electrons and how? |
| Answer» Very short answer .... Discharge tube experiment led to the discovery of electronWilliam crooks performed the discharge tube experiment by using two metallic rodes.When the discharge tube filled with the inert gas like helium at very low pressure and high voltage is applied some new types of negatively charged particles rays emitted from the cathode called as cathode rays.And the negativily charged particles are known as electron..I am not just doing copy paste its my own language<br>DISCOVERY OF ELECTRON:The Electron was discovered by J.J Thomson by conducting a Cathode ray tube experiment.For the experiment he used Crooke’s tube, which was 60cm long glass tube and had a small tube attached. To this small tube vacuum pump was attached, it also had two metal plates which were connected to battery by wires.The tube contained gas at atmospheric pressure. when current at high voltage (10,000volts) was passed following observations were made:\tWhen current was passed through a gas at 1 atmospheric pressure and at a very high voltage, nothing happened. That is no visible effect was seen inside the tube.\tThen further the pressure of gas was reduced by pumping the air out, with the help of vacuum pump. The pressure was reduced to 10-2atm, then on passing current it was seen that whole tube started glowing green.\tThen further the pressure was reduced to 10-4It was seen the whole glow vanished, but it was seen that at the end of the tube (anode side) there was a faint green glow observed.To confirm the faint glow anode was made perforated, and a zinc sulphide screen (fluorescent material) was placed behind it.When current was passed under same conditions it also started glowing green. This confirmed that under those conditions some rays were emitted through cathode, and were travelling towards anode. Those rays were called as cathode rays and found to consist of negatively charged particles called electron. | |
| 2749. |
For which of the following spices was atomic model is non applicable li2+, Be+ ,B4+, He+ |
| Answer» $$Be^+$$ while $$Be^{+3}$$ is applicable, an atom should be hydrogen like to be applicable.....<br>Be+ | |
| 2750. |
Among hydrogen and halogen which has highest reactivity. And reason behind it??? |
| Answer» | |