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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. |
1mol of c2 |
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Answer» It has only two electrons in outer most shell 24g |
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| 2. |
Define enthalpy of combustion. How is it measured? |
| Answer» The molar heat of combustion measures the amount of energy in a compound by measuring how much energy, in the form of heat, is released when the compound is burned. ... By multiplying the mass of water by the specific heat of water by the change in temperature, the molar heat of combustion can be calculated. | |
| 3. |
How can we draw the molecular orbital diagram of O2- |
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| 4. |
H is metal or non metal |
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Answer» Non metal Non metal Hydrogen is a nonmetal and is placed above group in the periodic table because it has ns1 electron configuration like the alkali metals. However, it varies greatly from the alkali metals as it forms cations (H+) more reluctantly than the other alkali metals.Jun 5, 2019 Non metal ? |
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| 5. |
What are rahul |
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Answer» Is it a question? Which type of question it is ?? |
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| 6. |
Why ionization enthalpy decreases while moving left to right?give reason. |
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Answer» Across the period on moving left ro right, ionisation enthalpy increases because the effective neuclear charge increases due to successive increase in no. of electrons , so the energy required to remove the electron also increases 1.Because the size of the element become large and the control or the charge of the nucleus the electrons become less |
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| 7. |
What is quntum number |
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Answer» Why we use orditals and subshell in atom to filling the electron Quantum number is that number which gives the location of finding electron where probability of finding electron are maximum |
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| 8. |
Overlapping of NH3&CH4 briefly explained |
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| 9. |
Revision |
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| 10. |
Limitation of kinetic theory of gases |
| Answer» Kinetic theory of gases has limitation when it come to the condensed state of matter liquid state -kinetic theory does not fully explain deep properties of liquid therefore the volume of liquid increase with increasing in temperature ,but not as in gases | |
| 11. |
Why the sample paper is not according to the cbse? |
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| 12. |
What is nuclear charge? |
| Answer» The nuclear charge is the total charge of all the protons in the nucleus. It has the same value as the atomic number. The nuclear charge increases you go across the periodic table. | |
| 13. |
Why bohr orbit are called stationary orbit |
| Answer» Bohr\'s orbits are called as stationary states because as we know that if an object moves in circular path it will lose energy but, according to bohr electrons which is moving in the circular path does not lose energy.if electrons lose energy they will fall into nucleus and get burnt. | |
| 14. |
Enthalpy |
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Answer» Energy Jgobogifulfpbjeiypboy |
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| 15. |
How understand prediction of elements? |
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| 16. |
Which is most ionic |
| Answer» Because of Cs being most electropositive and F being most electronegative, the electronegativity difference is largest. Hence, they are easily separable. Hence, CsF is most ionic, least stable compound. In case of KF, the electronegativity difference is smaller. | |
| 17. |
How many atoms of Oxygen are present in 5 moles of O2 |
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Answer» Since it is the O2 molecule mentioned in the question, soThere are 5 moles of O2 molecules. In each molecule-2 atoms of oxygen so in 5moles-2×5moles=10moles of O atoms.Hence, no. of O atoms will be 10×6.022×10^23=6.022×10^24atoms of oxygen. Moles =5 No of oxygen atoms = 5 × 6.022× 10^23 |
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| 18. |
Chemistry practical 1 |
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| 19. |
1g co2 contains how many carbon atoms? |
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| 20. |
Rutherford nuclear of atom |
| Answer» This year rutherford is cut off from syallbus | |
| 21. |
Notes on gases air pollutants |
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| 22. |
Identify the group having metal, nonmetal, liquid as well as gas at room temperature and how |
| Answer» 13 group | |
| 23. |
Which one has higher Dipole Moment ?(a). H2O(b). H2O2 |
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Answer» Why H2O H2o |
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| 24. |
Three Difference between precision and accuracy |
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Answer» Vivek kumar Accuracy -they lie very near to true value They may not be precise They are agreement of a true value Pre - *they are close to one another *They may not be accurate *They say the info about the measurung *instrument |
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| 25. |
Draw the structure of Glucose |
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| 26. |
Which bond is longer H-cl or H-F and Why? |
| Answer» Hf | |
| 27. |
What ia polarisibility? |
| Answer» | |
| 28. |
21 to 30 elements of periodic table |
| Answer» 21 -Scandium22 -Titanium23 -Vanadium24 -Cromium25 -Magnese26 -Iron27 -Cobalt28 -Nickel29 -Copper 30 -Zinc | |
| 29. |
Structure of molecules having 2bp and 3lp |
| Answer» LinearEg.- XeF2 | |
| 30. |
from where I get last 10 year papers of chemistry |
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Answer» My no. 9653854412 I have last 10 yrs paper i can send you if you want ok You can check our website at mycbseguide.com |
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| 31. |
What is electrin gain enthelpy |
| Answer» The amount of energy released when an electron is added to the outermost shell of an atom is called its electron gain enthalpy. | |
| 32. |
State Le chartlier law |
| Answer» Le Chatelier’s principles, also known as the equilibrium law, are used to predict the effect of some changes on a system in chemical equilibrium (such as the change in temperature or pressure). The principle is named after the French chemist Henry Louis Le Chatelier.Le Chatelier said that equilibrium adjusts the forward and backward reactions in such a way to accept the changes affecting the equilibrium conditions. | |
| 33. |
What is dipol dipol moment?How is london force different from dipol moment and vanderwaal\'s force? |
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| 34. |
Pi bond is stonger than sigma bond |
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Answer» No No, because sigma is head to head overlapping b/w S-S , S-P , P-P where as pi bond side to side overlapping b/w P-P.And the most important thing is in sigma bond intermolecular forces overlapping to each other where as in pi bond intermolecular forces parallel to each other. |
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| 35. |
In which system a flying bird is considered to be and why? |
| Answer» Loda rule | |
| 36. |
What is the formula of acetate |
| Answer» CH3COOH or C2H3O2 | |
| 37. |
What is Schrodinger\'s wave equation? |
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Answer» H wave function = E wave function Schrodinger\'s wave equation is H wave function=E wave function |
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| 38. |
What is the symbol delta mean |
| Answer» Delta means change.... Means final minus (-) initial | |
| 39. |
What is the difference between wave and radiation |
| Answer» Waves r energy being transffered in the form of oscillations.Radiation is the transmission of energy in the form of waves . | |
| 40. |
Number of significant figures in 1.00×10 power 6 |
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Answer» 3 3 significant figures 2+1 3 significant figure 3 |
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| 41. |
Explain molarity numericals |
| Answer» It is number of solute dissolve per litre volume of solution.it represented by M. Molarity = number of mole. solute/volume of solution(in litre) M= W x 10000/no of mole of solute M= d x 1000 / N | |
| 42. |
Experiments of class 11 chemistry video |
| Answer» Search it on YouTube..... U will get ur answer... | |
| 43. |
Hey anyone online here |
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Answer» #.. C Hi shivendra Hii Hi Muskaan No R u angry with me Not interested Can i say Actually i wanna say something to u Means? U can ask but academic questions only I have some questions |
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| 44. |
Chem class 11 chapter 2 all formulas |
| Answer» | |
| 45. |
Which is standard boiling point?? |
| Answer» 99.61 degree celcius | |
| 46. |
Write IUPAC names of the following compounds (CH3)3C CH2C(CH3)3 |
| Answer» 1) 2 methyl propane2) 2, 2 dimethylpropane | |
| 47. |
Sodium & potassium can not be prepared by electrolysis of their aqueous solutions. Why? |
| Answer» Potassium metal reacts with water by displacing the hydrogen, because it is significantly more reactive. During electrolysis, In aqueous solution the hydrogen from the water will always be liberated in preference to metallic potassium. In the case of sodium, It is not possible to isolate sodium by electrolysis of aqueous solutions of sodium salts because hydrogen ions are more easily reduced than are sodium ions; as a result, hydrogen gas forms at the cathode instead of the desired sodium metal. | |
| 48. |
What is vicositu |
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Answer» Sorry ?i think it\'s * viscosity* I ?? It is a physical property of fluid and it shows the rasistance to flow Example.. Honey has more vescocity than water |
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| 49. |
When we drop Mercury why it\'s shape is spehirical???? |
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Answer» Because of surface tension and intermolecular force of attraction towards its center Mercury drops are spherical because of surface tension. It is the force with which atoms or molecules on the surface of liquid pull each other towards themselves. Hence when small amount of liquid is separated from rest in the form of drop, the whole amount of liquid gets in the most energy efficient shape as sphere due to the attraction of atoms or molecules. |
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| 50. |
The chemical formula of sylulvite |
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Answer» And molecular weight is 74.55gm Its chemica formula is kcl Sylvite, also called sylvine, is a major source of potassium or potash used in fertilizer products. It\'s chemical formula is KCl . |
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