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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Write the common characteristics of representative elements and transition elements |
| Answer» | |
| 2. |
Resonating structures which do not obey octet rule |
| Answer» | |
| 3. |
When 12th class CHAPTER solid states come in 11th |
| Answer» Yes | |
| 4. |
Wieghtag of class 11th solid state new CHAPTER |
| Answer» U can see the weightage of this chapter in this app in the syllabus section | |
| 5. |
Hey! Any old user |
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Answer» Hey Yes i am Me Yes i am |
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| 6. |
In the molecules clf3 , pocl3,bcl3,so3which has largest bond angle at the central atom |
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| 7. |
Which of the following orbitals are possible 1p,2p,2s,3f |
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Answer» 2s, 2p 2p,2s, |
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| 8. |
How to balance the redox reaction using oxidation number |
| Answer» Step for balancing redox reaction by oxidation number method : ------------(1.) Write the skeleton redox reaction. (2.) Indicate the oxidation number of atoms in each compound above the symbol of the elements. (3.) Identify the elements/ element, which undergo a change in oxidation number, one whose oxidation number increases and the other whose oxidation number decreases. (4.) Calculate the increase/decrease in oxidation number per atom. Multiply this number of increase/decrease of oxidation number, with the number of atoms, which are undergoing change.(5.) Equate the increase in oxidation number with decrease in oxidation number on the reactant side by multiplying the formulea of the oxidizing and reducing agent.(6.) Balance the equation with respect to all other atoms except hydrogen and oxygen. (7.) Finally, Balance hydrogen and oxygen. (8.) For reaction taking place in acidic solutions, add H^ ions to the side deficient in hydrogen atoms. { symbol (^) means + }(9.) For reaction taking place in basics solution add molecules of water to the side deficient in hydrogen atoms and simultaneously add equal number of OH^ ions on the other side of the equation. { symbol?(^) means that - }[ I hope this will help you]. | |
| 9. |
Why noble gases have positive electron gain enthalpy ??? |
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Answer» Thank you so much ....Xyz Abc I understood properly....?? It is bcoz their octat is alredy completed. So in order to gain an electron, they need to absorb energy to make one more energy level for the new electron. So its an endothermic process bcoz of whicb it is positive They are already stable so they have no need to gain electron and become unstable.... |
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| 10. |
What is isolated gaseous atom??? .... |
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Answer» Thanks Mr. Thakur For this reason, the term ISOLATED GASEOUS ATOM is used in the definition of ionization enthalphy. Ground state of an atom refers to the most stable state of an atom. If an isolated gaseous atom is in its ground state, then less amount of energy would be required to remove an electron from it. Used in ionization enthaply to remove most loosely bound electron Thanks aadi.....?? Ishu we can say it is most stable state of atom |
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| 11. |
calculate ratio between the wavelength of the electron in the and the proton proton |
| Answer» | |
| 12. |
what is molality and molefraction |
| Answer» # Molality- The no. Of moles present in 1 kg of solvent# Mole fraction - The ratio of no. of moles present in the solute to the total no. of moles in the solution | |
| 13. |
What is photoelectric effect ???? |
| Answer» The phenomenon of ejection of electrons from the surface of a metal when light of suitable frequency strike on it,, is called photoelectric effect... ..... The emitted electrons are called photoelectrons. | |
| 14. |
What is effect of Heisenberg Uncertainty Principle?????......** |
| Answer» I think ur saying about what is heisenberg uncertinity principle it simply means electrons are very microscopic particle which we can\'t see and this law simply states that it is impossible to measured velocity and momentum and locate a position of a micro particle (electron) at same time. The reason behind this electons moves with a speed of light if we determine its position than we can\'t measures it momentum | |
| 15. |
What is the significance of schrodinger\'s equation? |
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Answer» It provide us four no. 2 which are principal no. Azuimithal no. Magnetic no. And spinning .which give info. Of electron of particular atom. It is signifies the probability of electron found in 3- dimension |
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| 16. |
In the e.c of Cr, why are 2 electrons not added to the s- orbital of the 4th shell? |
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Answer» Tq Mohit Kumar Singh Hope satisfied with the answer Here Configuration of cr is 1s2, 2s2, 2p6,3s2, 3p6, 4s1,3d5 s orbital can\'t accommodate two more electons I dont think so.. Because half field and ful field orbitals are more stable then Because cr and cu thise are exceptions case |
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| 17. |
Calculate the molarity of a solution of ethanol in which the mole fraction of ethanol is 0.40. |
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| 18. |
What was octet rule ?? |
| Answer» According to it an atom acqire noble gas configuration( 8 electon in last shell) to become stable either by gaining or losing electron. | |
| 19. |
20ml of CH4 is burnt in 70ml of O2. What would be the volume of gases after explosion and cooling ? |
| Answer» 85ml | |
| 20. |
Different in homogeneous mixture and heterogenous mixture. |
| Answer» | |
| 21. |
What is the electrostatic force. |
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Answer» The force of attraction or repulsion between two point charges is called electrostatic force......?? attraction between positively and negatively charge ions is called electrostatic force |
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| 22. |
More electronegative element |
| Answer» Fluorine | |
| 23. |
Why ice floats on water |
| Answer» It is due to change in density when water turns into ice | |
| 24. |
Iron pieces are attract towards a magnet but zinc are not.why? |
| Answer» Magnet only attracts iron, nickel and cobalt | |
| 25. |
Ice is lighter than water ? |
| Answer» Because its density is lesser. | |
| 26. |
Why NH3 has more dipole moment then NF3? |
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Answer» Aashu , bhai agar answer pata tha to question kyo kiya Yeah, becoz fluorine is more electronegative than hydrogen. In NH3, nitrogen is more electronegative than hydrogen but in case of NF3 fluorine is more. Bhai self question self answer Because Flourin fluorine is more electronegative than hydrogen |
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| 27. |
Compare the IE1 and IE2 for nitrogen |
| Answer» 1 | |
| 28. |
Explain kinnematics theory of gases. |
| Answer» | |
| 29. |
Why alkine metal are react with air and water |
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Answer» because of their high reactivity alkine metal are react with air and water This is highly react metal |
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| 30. |
How many tetra hedral void in cubic close packing |
| Answer» 8 | |
| 31. |
What is fluorescent ? |
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Answer» Fluorescent is a substance having a fluorescence ( vividly colourful ). What is mateer |
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| 32. |
What is the theoretical proof of Hess\'s law |
| Answer» | |
| 33. |
Why dipole moment of NH3 is greater than that of NF3 |
| Answer» Nh3 has higher dipole moment than nf3 as in nh3 all dipole moment vectors and up and in nf3 one vector lone pair to nitrogen is opposite to the 3 of n-f. | |
| 34. |
Ostwalds dilution law is applicable for only weak electrolytes |
| Answer» | |
| 35. |
calculate molality of 2gram nacl dissolve in250ml |
| Answer» Molarity= given mass/(molar mass * volume) => 2/58.5*0.25=> 0.1367M | |
| 36. |
Which reference should you suggest? |
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Answer» Cengage Pradeep and ABC both are best pradeep is best PardipOrAll in one |
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| 37. |
Calaculate the energy per quanta of electromagnetic radiation of wavelength 6626Angstron |
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| 38. |
Molality of con.hclin.36.5percentof hcl by mass is |
| Answer» | |
| 39. |
Why and how man is called the receptor of SO2 and NO |
| Answer» | |
| 40. |
Easy way to learn f_block elenents with song.... |
| Answer» Bro we are not honey singh ask this to him?? | |
| 41. |
How would you justify the presence of 18 elements in the 5th period of the periodic table ? |
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| 42. |
what is component |
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Answer» component are also known as constituent. The substance which make a mixture are called component |
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| 43. |
How many gram molecules present in 49÷10g of sulphuric acid |
| Answer» 98g H2SO4 stands for 1 mole or 1 gram molecule.Then49/10 H2SO4 have 1/98×49/10 =1/20=0.05 moleSo it contains 0.05 gram molecules. | |
| 44. |
1 L of gas at STP weighs 1.97g. What is molecular mass?? |
| Answer» 44.128 | |
| 45. |
Definition of effective nuclear charge |
| Answer» Effective nuclear charge is the net positive charge experienced by valence electrons. | |
| 46. |
Is solid state is added to this chapter or not |
| Answer» Yes added to this chapter. | |
| 47. |
0.6 mole atoms of nitrogen calculate no. Of atom |
| Answer» | |
| 48. |
what is octet rule |
| Answer» Noble configuration for 18th group elements | |
| 49. |
State and explain law of conservation of mass |
| Answer» This law states that during a chemical reaction mass can neither be created nor destroyed it can only be transformed from one one state to the other. Mass if the reactants must remain equal to the mass of the products. | |
| 50. |
What is orbitale? |
| Answer» Shell | |