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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.
| 1851. |
Limitations of dobereiner classification |
| Answer» he can make only three such triad | |
| 1852. |
The no of equivalents of Na2S2O3 required for the volumetric estimation of one equivalent of Cu^2 is |
| Answer» | |
| 1853. |
How to prove that hydrogen and oxygen are diatomic gases |
| Answer» | |
| 1854. |
Difference between sigma MO and pi MO |
| Answer» Sigma bonds are the first bond to form between atom with molecules. whereas pi bonds are second. sigma bonds of often formed by a the combination of s orbital in different atom where is pi bond are formed from the combination of P similar orbitals in different atom. | |
| 1855. |
What are the limitations of octet rule reply fast asap!!!????????? |
| Answer» How can u type such a long answer??<br>a) Two Electrons: Hydrogen and helium have only one electron shell. The first shell has only one s orbital and no p orbital, so it holds only two electrons. Therefore, these elements are most stable when they have two electronsb) Expanded Octet: The covalently bonded compounds like PCl5, ClF3, ICl3, SF6, IF7, OsF8 and OsO4 have expanded octets in them. The central atoms in these molecules have more than eight electrons in their outermost shell. c) Less Than an Octet: In BeCl2, the central atom Be has only 4 electrons and in BF3, boron shares its three electrons with three fluorine atoms. The fluorines follow the octet rule, but boron has only six electrons.d) Odd Numbers: Nitrogen have an odd number of electrons and will form somewhat stable compounds. Nitric oxide has the formula NO. No matter how electrons are shared between the nitrogen and oxygen atoms, there is no way for nitrogen to have an octet. It will have seven electrons instead. | |
| 1856. |
Basic medium balancing? |
| Answer» | |
| 1857. |
The weight of a molecule of the compound C60 H122 is..................???? |
| Answer» | |
| 1858. |
Explain me about the atoms in a unit cell? |
| Answer» | |
| 1859. |
Hydrogen is unique in behaviour because of its |
| Answer» Hydrogen is unique in its behavioir because of its unique property of gain and share the electron which form covalent bond and it different from alkali metal and halozen | |
| 1860. |
What is the concentration in %(mass/volume) of a solution contaning 15 gm KCl in 600ml solution |
| Answer» | |
| 1861. |
Explain why cation are smaller and anion are larger in radii than their parent atoms? |
| Answer» Because cation is electon proton ratio greater than 1 and anion electron proton ratio is smaller than 1 | |
| 1862. |
why electron is not present in necleus? |
| Answer» Electrons are having negative charges. If they present inside the nucleus, they will be neutralised by the positive charges. Thus, the atom will have no charged particle and it will become unstable. | |
| 1863. |
Mid term ka questions paper bhejo |
| Answer» Start ho jayga to bhejna<br>Abhi start nhi hua hai okk | |
| 1864. |
What is glass? A solid? A liquid? A gas? |
| Answer» | |
| 1865. |
Chemical formula of sodium bicarbonate |
| Answer» NaHCO3<br>NaHCO3 | |
| 1866. |
What is the lewis dot structure of NO2?? |
| Answer» One single bond and other double bond but few difcult because valance of nitrogen is 5<br>It is possible for single atom | |
| 1867. |
The number of moles of electrons which weigh one Kg is ??? |
| Answer» Thanksss...<br>Mass of 1 mole of electrons = 6.023x1023 x 9.1 x 10-31Kg. Now u can calc. ? | |
| 1868. |
How does 52 amu He becomes 13 He atom??? |
| Answer» 1 he atom=4 amu soo 13 he atom will be equal to 52 amu | |
| 1869. |
CnH2n-1 is general formula of ??? |
| Answer» Plz tell tomorrow is my test<br>Alkyl is CnH2n+1 I am asking for -1<br>No it\'s alkyl group<br>Alkynes | |
| 1870. |
Nitrogen family element as also known as Nickogen why ? |
| Answer» | |
| 1871. |
Why chlorine has higher electron gain enthalpy than flourine |
| Answer» Fluorine due to its small size can\'t except more electron into it p-orbital. But the chlorine due to large atomic size have no trouble in accepting the electron therefore the electron gain enthalpy is more for chlorine than fluorine. | |
| 1872. |
Explain the Schrodinger Equation., and si |
| Answer» | |
| 1873. |
What is the difference between matter and substance |
| Answer» anything that occupies space and has mass is called matter and the matter that has specific composition and chemical characteristics is called substance. | |
| 1874. |
What is a change of syllabus in chemistry |
| Answer» No SOLID STATE is NOT added...But in some schools the solid state is added...<br>Some portion is reduced from ch-2 and solid state is added<br>Nitrogen family is also<br>Solid part is added in ch 5 | |
| 1875. |
Define normality ? What is basisity and acidity on a solution |
| Answer» Thanks ??<br>Normality is defined as number of gram equivalents of the solution dissolved per liter of the solution.\xa0....... Basicity of an acid refers to the number of ionisable hydrogen ions(H+) produced when the acid dissolves in water.... acidity -the amount of H+ ions can be produced by a compound determines the acidity. | |
| 1876. |
Brief description of hybridisation |
| Answer» When 2 or more atomic orbital combine to form equivalent orbitals and this process is known as hybridisation | |
| 1877. |
How to to wet test for anion in Chemistry practical? |
| Answer» | |
| 1878. |
what is Pauli exclusion principal |
| Answer» Thanks you both<br>Acc. to pauli principle the three quantum no. Same but fourth quantum no. must be different<br>It states that no two electrons in an atom can have same set of all the four quantum numbers. | |
| 1879. |
Radius of cation is always smaller than parent atom why? |
| Answer» When electron removed form it\'s parent atom the strong nuclear force is increases it attract the outer most shell and the size of cation decrease.<br>A parent atom is neutral and when an atom is loses its electron from its valence shell and acquires positive charge i.e. cation and becomes smaller in size than its parent atom. | |
| 1880. |
Salt bridge? |
| Answer» Stable the equilibrium means concentration of ions in both side balanced by electrolytes which present salt bridge. | |
| 1881. |
Write the ideal gas equation for one mole of gas. |
| Answer» (P+a/v^2)(V-b)=RT. | |
| 1882. |
Calculate the no. Of moles of oxygen present in 22 g CO² |
| Answer» 22/44=0.5<br>How<br>1 | |
| 1883. |
Exam datesheet kya h |
| Answer» 18 se | |
| 1884. |
What is the work of quantum numbers |
| Answer» It helps in getting information about any electron of an atom by telling its shape size orbital spin orientation etc.. | |
| 1885. |
What is aquarezia?? |
| Answer» It is a mixture of HCl and HNO3 in the ratio 3:1<br>Aqua regia is formed by mixing nitric acid with hydrochloric acid in fixed proportion | |
| 1886. |
Which online site is best for studying chemistry? |
| Answer» Learn cbse with best notes and complete ncert solutions | |
| 1887. |
Halogens except flourine shows positive oxidation state of +1,+2,+3,+5&+7? |
| Answer» | |
| 1888. |
Calculate mass of 2.5g atoms of magnesium |
| Answer» | |
| 1889. |
Is there any different in frequency between dark red colour and faded red colour |
| Answer» | |
| 1890. |
What is the main points of the solid state????? |
| Answer» It is also rigid<br>Hardness, conductivity, sonority, lustre definite size shape and volume etc,etc | |
| 1891. |
Define:- Atom,Molecule,Element,Compound,protone,neutrone,electron |
| Answer» Nice rishita<br>Atom- It is the smallest particle of an element which may or may not be capable of independent existence.Molecule- It is the smallest particle of an element or a compound which can exist freely.Element- It is a pure substance that contains only one kind of particles.Compound-are pure substances containing more than one kind of elements.Proton- they are positively charged particles in the nucleus of an atom.Neutron- they are present in the nucleus of an atom but are neutral.Electrons - they are negatively charged particles that revolve in the shells of atom. | |
| 1892. |
How to calculate payload of a balloon |
| Answer» | |
| 1893. |
How to prepare M/20 Naoh solution in 250 volume |
| Answer» Add 0.125moles in 250ml of water ie,add 0.5 g of NaOH in 250 ml of water | |
| 1894. |
Why subshells named spdf |
| Answer» Because these notation are the initial letters of words, sharp, principal, diffused and fundamental, formerly used to describe different spectral lines.0 1 2 3s p d f<br>Because there electronic configauration ends with these names whereas 1and2groups named s with there e.c s subshell | |
| 1895. |
Why lewis dot structure was failed??? |
| Answer» Lewis dot structure fail because he just give the structure of an species involving transfer or share of e there was no concept of repulsion between e pairs and diff engeries of orbital taking part which can change the shape<br>It does not give shape of molecule in 3d | |
| 1896. |
what is directional nature |
| Answer» ;\';, | |
| 1897. |
How many mole of methane are required to produce 22g of CO2 on combustion |
| Answer» Half mole | |
| 1898. |
Londan forces |
| Answer» | |
| 1899. |
Katna syllbas aya ga sepetember exam |
| Answer» Hi manika<br>Chem 5 ch Phy 6ch and 7th ch only centre of mass tak aa raha haiBio 8 chMaths 6 ch English dono books me 4 - 4 ch and grammar | |
| 1900. |
Calculate th no.of atoms present in 11.5l of H™2at ntp |
| Answer» | |