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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.
| 2751. |
What is chemistry???? |
| Answer» Chemistry is a branch of science which studies the structure of substance atoms molecules ions their composition and formation | |
| 2752. |
What is de- Brogile equation...? |
| Answer» First of all it was studied by Einstein that all microscopic particles shows dual nature i.e wave nature and particle nature .Then De Broglie co related these nature by an equation called as De Broglie equation | |
| 2753. |
Spontaneous and non spontaneous????? |
| Answer» A process which under some conditions may take place by itself or by initiation independent of the rate is called\xa0spontaneous process.A process which can take place by itself or has an urge or tendency to take place is called\xa0spontaneous process.A spontaneous process is simply a process which is feasible.The rate of the process may vary from extremely slow to extremely fast.Examples of processes which take place by themselves :1) Dissolution of common salt in water2) Evaporation of water in an open vessel\xa0A process which can neither take place by itself nor by initiation is called a\xa0non spontaneous process.For Example1) Flow of water up a hill2) Flow of heat from cold body to a hot body3) Diffusion of gas from low pressure to a high pressure4) Dissolution of sand in water | |
| 2754. |
bond order of hpo3 2- |
| Answer» The bond order of hpo3^2- is = \' 0 \' | |
| 2755. |
What is enthalpy of combustion |
| Answer» Enthalpy of combustion of a substance is the change in enthalpy produced when one mole of the substance is completely burnt in air or oxygen at a given temperature. | |
| 2756. |
Enthalpy of sublimation?? |
| Answer» | |
| 2757. |
what is enthalpy of vaporization |
| Answer» The enthalpy of vaporization, also known as the heat of vaporization or heat of evaporation, is the amount of energy that must be added to a liquid substance to transform a quantity of that substance into a gas. The enthalpy of vaporization is a function of the pressure at which that transformation takes place. | |
| 2758. |
What will be the IHD of c6H13Cl. |
| Answer» | |
| 2759. |
How many atoms of hydrogen are in 67.2L of H2 at STP? |
| Answer» 36.132 X 10²³ Atoms.... | |
| 2760. |
the percentage of carbon is ca (hco3)2is |
| Answer» Composition of Calcium Hydrogen Carbonate - C2H2CaO6ElementS symbol Mass\xa0Percent Calcium Ca 24.7225%Hydrogen H 1.2435%Carbon C 14.8178%Oxygen O 59.2162% | |
| 2761. |
The electron gain enthalpy of noble gases is positive. Explain |
| Answer» \xa0Due to the stable configuration, they do not accept an electron and hence they have large positive electron gain enthalpy. An electron has to enter the next higher principal quantum level which leads to a very unstable electronic configuration.<br>Noble Gases have a full filled orbital in their last shell, they have a very stable electronic configuration, they don\'t need any extra electron.An electron has to enter the next higher principal quantum level which leads to a very unstable electronic configuration.by taking electron thair energy will be increased, but all atom wants to live in their least energy state...<hr>very short answer it is difficult to add an extra electron due to stable electronic configuration. so it needs energy to do so. | |
| 2762. |
How many moles of methane are required to produce 22g CO² after combustion. |
| Answer» $$CH_{4(g)}+2O_{2(g)} \\overset{\\Delta}{\\longrightarrow}CO_{2(g)} + 2 H_{2} O_{(l)}$$ ✓✓<br>$$CH_{4(s)} + O_{2(g)} \\longmapsto CO_{2(g)} + 2H_{2(g)}$$<br>22g of Carbon dioxide contain ½mole of Carbon so you need ½mole carbon in methon$$CH4 +O2 → CO2 + 2H2$$ | |
| 2763. |
Maths? |
| Answer» | |
| 2764. |
Chemistry? |
| Answer» | |
| 2765. |
Oxidation number? |
| Answer» | |
| 2766. |
Average oxidation number? |
| Answer» | |
| 2767. |
Chemical property of S- block element... ✍✍✍✍✍✍ |
| Answer» Ha moti.. ???<br>1) All the\xa0alkali metals are highly reactive\xa0elements since have a strong tendency to lose the single valence s-electron to form uni positive ions having inert gas configuration.2) This\xa0reactivity arises\xa0due to their low ionisation enthalpies and high negative values of their standard electrode potential.3) Due to their strong tendency to lose the single valence electron ,alkali metals also act as a\xa0strong reducing agents. Reactivity of an element is measured in terms of its reducing character.4)\xa0Ionization enthalpy\xa0is a measure of the tendency of an atom to lose electrons in the gaseous state.Thus, lower the ionization enthalpy, greater is the tendency of an element to lose electron and hence stronger is the reducing character or higher is the reactivity of the element.5)The\xa0ionization enthalpies of alkali metal decreases down the group, therefore, their reducing character or reactivity in the gaseous state increases from Li to Cs , i.e. Li< Na< K< Rb<Cs. | |
| 2768. |
Ch- 5 explain youTube channel ?? |
| Answer» ‽¿?¿?‽ | |
| 2769. |
What ia aliphatic compounds? |
| Answer» Aliphatic compound, any chemical compound belonging to the organic class in which the atoms are connected by single, double, or triple bonds to form nonaromatic structures.<br>An aliphatic compound or aliphatic hydrocarbon is an organic compound containing hydrogen and carbon atoms that are usually linked together in chains that are straight. | |
| 2770. |
Characteristics of transition element |
| Answer» The important characteristics of transition metals are:(i) All transition elements are metallic in nature, e.g., all are metals.(ii) These metals exhibit variable oxidation states.(iii) Transition metal atoms or ions generally form the complexes with neutral, negative and positive ligands.(iv) Compounds of transition metals are usually coloured.(v) The compounds of these metals are usually paramagnetic in nature.(vi) Transition metals and their compounds act as good catalysts, i.e., they show catalytic activities.(vii) These metals form various alloys with other metals of the series.(viii) These metals form interstitial compounds with C, N, B and H. | |
| 2771. |
Which of the following will have the most negative electron gain enthalpy |
| Answer» Electron gain enthalpy generally becomes more negative across a period as we move from the left to the right. Within a group,m electron gain entahlpy becomes less negative down a group. However, adding an electron to the\xa02p2p-orbital leads to the greater repulsion than adding an electron to the larger\xa03p3p-orbital. Hence, the element with the most negative electron gain enthalpy is chlorine, and the one with the least negative electron gain enthalpy is phosphorus. | |
| 2772. |
N+l rule |
| Answer» | |
| 2773. |
Number of atoms of He in 100 u of He (atom mass He is 4u) . Options: 1- 25, 2- 50, 3- 100 4- 400 |
| Answer» 25<br>The number of atoms present in 100 amu of helium is\xa025 atoms.\xa0To find:Number of atoms = ?Solution:The number of atoms present in 100 amu of helium is to be calculated by using\xa0simple unitary method\xa0knowing that the\xa0a.m.u. is the atomic mass unit\xa0which itself\xa0represent the mass.So thereby, we need to know the "mass of one atom" and that can be divided to know the "number of atoms".Therefore,The "mass of one atom" of helium is known to be 4 a.m.u.Thereby, | |
| 2774. |
Numerical problems on the following of molecular mass |
| Answer» | |
| 2775. |
Properties of anode rays |
| Answer» +ve chargedtravel in straight linecan be deviated by negative charge particles naturealmost invisible , can be spotted by using flurosent screennature depend on the gas prasent in tube.... etc..<br>These are Properties of anode rays as under:(i) They consist of Positively charged particles. Their mass is virtually the same as that of the atoms from which they are derived and is found to be equal to the atomic mass of the gas in the discharge tube.(ii)They travel in straight lines.(iii)They are capable of producing physical and chemical changes.(iv) They can penetrate thin metal foils.(v)They can produce ionization in gases.(vi)They are deflected by electrical and magnetic fields just as the cathode rays but in opposite directions showing that they are oppositely charged, i.e., they carry positive charge. Since their deflection is very little, they consist of very heavy particles. | |
| 2776. |
What is chemistry....?? |
| Answer» Mera to jldi answer he submit nhi hota h ? | |
| 2777. |
Define hard water, and heavy water.... ✍✍✍✍✍ |
| Answer» PCb...<br>Meri to pcm h, tumhari..??? | |
| 2778. |
Corona vaccine ki jagah, Corona na birthday aa gya.... ???????? |
| Answer» ?<br>??.. Manao birthday phir<br>Ryt ?? corona ke Ek saal pure huye... ??.. | |
| 2779. |
How many significant figures are present in (a)4.01×10(b)8.256(c)100 |
| Answer» a) 3 ....b) 4... c) 1 | |
| 2780. |
Lewis base? |
| Answer» Atomic or molecular chemical species having a highly localized HOMO (The Highest Occupied Molecular Orbital) act as Lewis bases. These chemical species have the ability to donate an electron pair to a given Lewis acid in order to form an adduct, as discussed earlier.Examples of Lewis bases which have an ability to donate an electron pair are listed below.\tPyridine and the derivatives of pyridine have the ability to act as electron pair donors.\xa0Thus, these compounds can be classified as Lewis bases.\tThe compounds in which Oxygen, Sulphur, Selenium, and Tellurium (which belong to group 16 of the Periodic Table) exhibit an oxidation state of -2 are generally Lewis bases. Examples of such compounds include water and ketones.\tThe simple anions which have an electron pair can also act as Lewis bases by donating these electrons. Examples of such anions include H–\xa0and F–. Even some complex anions, such as the sulfate anion (SO42-) can donate pairs of electrons. | |
| 2781. |
Lewis acid? |
| Answer» Kitne chapter aaye the...?...kal Konse subject ka h..?<br>Lewis Acids are the chemical species which have empty orbitals and are able to accept electron pairs from Lewis bases. This term was classically used to describe chemical species with a trigonal planar structure and an empty p-orbital. An example of such a Lewis acid would be BR3\xa0(where R can be a halide or an organic substituent).Some common examples of Lewis acids which can accept electron pairs include:\tH+\xa0ions (or\xa0protons) can be considered as Lewis acids along with onium ions like H3O+.\tThe cations of d block elements which display high oxidation states can act as electron pair acceptors. An example of such a cation is Fe3+.\tCations of metals such as Mg2+\xa0and Li+\xa0can form coordination compounds with water acting as the ligand. These aquo complexes can accept electron pairs and behave as Lewis acids.<br>Vdiyaa gya bhai? aaj chemistry tha..... | |
| 2782. |
Structure of atom pdf notes |
| Answer» | |
| 2783. |
What is trivial names ? |
| Answer» Gud mrng bhai..... Itte din baad ?..kaise Ho. ? | |
| 2784. |
Write a electronic configuration of Zn(Zink) |
| Answer» $$1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰$$<br>$$1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰&&<br>The\xa0electronic configuration\xa0of Zinc is 1s2,2s2,2p6,3s2,3p6,4s2,3d10. | |
| 2785. |
Give any four characteristics properties of transition elements??? |
| Answer» Transition elements : The elements which have plenty filled d - subshells are known as d - block elements . These elements are lying between S and P - block elements. They represnt transition transition (change) in properties from strongly electropositive and metallic character of S - block elements to electronegative and non-metallic character of P - block elements, i.e. their properties are inter-mediate to those of S - block and P - block elements.Four characteristic properties of transition metals.\xa0\tThey are hard, heavy and less reactive metals.\tThey show variable valencies.\\\tThey give coloured ions.\tThey have high tendency to form complex compounds. | |
| 2786. |
Define Dalton law of partial pressure |
| Answer» Dalton’s law of partial pressures is a gas law which states that the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures exerted by each individual gas in the mixture. For example, the total pressure exerted by a mixture of two gases A and B is equal to the sum of the individual partial pressures exerted by gas A and gas B (as illustrated below). | |
| 2787. |
Represent hydrogen bonding in HF molecule, H2o molecules and orthonitrophenal |
| Answer» | |
| 2788. |
Chlorophyll absorbs radiation of wavelength 700nm. What is the frequency of this radiation. |
| Answer» Frequency=1÷(700*10^-9)=1.42*10^6Wavelength is inversely proportional to frequency.hope it helps.... | |
| 2789. |
Oxidation number of NO? |
| Answer» O always has an oxidation state of -2, and since NO is neutral, N must have an oxidation state of 0-(-2)=+2.....<br>But I think zero hoga ?<br>thanks to both☺<br>+2 Is Ryt... | |
| 2790. |
Chemical property of hydrogen. ✍✍✍✍✍✍✍✍✍ |
| Answer» | |
| 2791. |
Calculate mass of 2.6 gram molecules of SO2 |
| Answer» 2.6 g ! What the question ? | |
| 2792. |
How many structural isomers of primary amines are possible for the formula C4H11N? |
| Answer» 1. Primary Amines:\tn-butyl amine\tsec-butyl amine including 2 optical isomers\tiso-butyl amine\ttert-butyl amine2. Secondary amines\tN-methyl n-propyl amine\tN-methyl isopropyl amine\tN, N-diethyl amine3. Tertiary amine\tN-ethyl N, N-dimethyl amine | |
| 2793. |
Calculate the number of atoms of each element in 245g of kclco3. |
| Answer» | |
| 2794. |
_shiv_utkarshm7890_ Instaa id h follow krloo ??? |
| Answer» Broo 500 pr followers mughee kya zarurat h Mai islie bol rhaa ki koi h baatein start kre<br><a href="https://imgbb.com/"></a>? | |
| 2795. |
How do dipole moments of molecules of CO2, CH4, H2O, and NH3 help in ascertaining their structure? |
| Answer» | |
| 2796. |
3 moles of NaOH is dissolved in 17 moles of water. Calculate mole fraction of NaOH and water. |
| Answer» 3/20<br>5 | |
| 2797. |
जल का मोलर द्रव्यमान |
| Answer» 18.01528\xa0g/mol | |
| 2798. |
Definei)hypotonic solutionii )ideal solutioniii)colligative properties |
| Answer» Suppose there is a cell inside which there is high concentration of solute and outside low concentration.so it will move from outside to inside which become hypotonic solution.it occurs as a result of endosmosis.Ideal solution is a solution which follows Raoults Law.Colligative properties are those properties which depend on number of solute particles.<br>Ideal solution is that solution which follows Raoult\'s law. An ideal solution or ideal mixture is a solution in which the enthalpy of solution (\xa0ΔHsolution\u200b,ΔVsolution\u200b,ΔSsolution\u200b\xa0is 0 ,with the closer to zero the enthalpy of solution, the more "ideal" the behavior of the solution becomes<br>Sinful | |
| 2799. |
https://docs.google.com/document/d/1xxhOUxIQtsp0AYOzkXPAyEnN1nQNU8OSEfQjD5k57J0/edit?usp=drivesdk |
| Answer» | |
| 2800. |
What are isotopes and isobars |
| Answer» Yess<br>\tISOTOPES:\xa0Are those elements which have same atomic number ,but different mass number.\t\t\xa0ISOBARS:\xa0Are those elements which have same mass number, but different atomic number.\t<br>Having different atomic mass and same atomic no. And vice versa | |