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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. |
A gas has mass of 32g and it occupiex 20L at STP. Calculate molar mass |
| Answer» 35.55 | |
| 2. |
4gms of NaOH is added to 2kg of water . Find molality |
| Answer» 0.05 | |
| 3. |
What is industrial chemistry and agriculture |
| Answer» | |
| 4. |
What is planks quantam theory |
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Answer» Planck’s quantum theory: According to this theory:\tEnergy emitted or absorbed is not continuous, but is in the form of packets called quanta .In terms of light it is called as photon.\tEach photon carries an energy which is directly proportional to the frequency of wavelength i.e. E depends upon v (nu).\tOr E=hv (where v is frequency)Value of h =6.634 x 10-34Jsec\t\t\tEnergy associated with no of packets is given by:E=nhv (where n is an integral multiple)This formula can also be written as:E = (nhc)/ (λ)\xa0(Because we know frequency=speed of light/wavelength)V = (c/ λ) According to\xa0Planck\'s quantum theory, Different atoms and molecules can emit or absorb energy in discrete quantities only. The smallest amount of energy that can be emitted or absorbed in the form of electromagnetic radiation is known as\xa0quantum. |
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| 5. |
Why electron have nagetive charge. |
| Answer» By the experiment of cathode rays discharge tube. | |
| 6. |
Explain the preparation method of hydrogen |
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Answer» You can also prepared hydrogen by dissociate the bonding ..and they liberate hydrogen or hydrogen oxide but take care and put the more value of electronegativity in bonding.. 1. a reaction between acid and metal. |
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| 7. |
Some important question of chemistry for half yearly exam that is always asked in exam |
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Answer» 7 How many units test will be conducted |
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| 8. |
What is He |
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Answer» It is a noble gas helium |
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| 9. |
In exam ... What will be more theory or numerical |
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Answer» Theory related numericals Theory Theory |
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| 10. |
What is chain isomerism |
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| 11. |
Why H2s is solid and H2o is liquid |
| Answer» This question | |
| 12. |
What are the deviration of gasses |
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| 13. |
Calculate pH of 10^-8 M HCl solution |
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| 14. |
hysenberg uncertainty principle |
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Answer» It ststses that - \' it is impossible to find the exact positon and exact velocity simultaneously for a fast moving micro-particle. The actual position and velocity of a moving electron can not be calculated at a single point of time |
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| 15. |
What is equillibrium |
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Answer» With example The state in which the rate of forward reaction is equal to the backward reaction |
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| 16. |
What is a polar or non polar? |
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Answer» Bond between HCl is polar While bond between o2 is non polar If molecules has some polarity in nature then it is polar in nature and if is not so then it is nonpolar in nature |
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| 17. |
What is the difference between real gas and ideal gas |
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Answer» In pb=nrp what is the meaning of b ? Gasses which follow the rules of pb=nrp are ideal gasses and which do not follow the rules of pv=nrt are called real gasses Real gas are the gas which do not follow all the law of gases. Whereas the gases which follow all the gas laws are called ideal gas |
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| 18. |
Node is the region where the probability of electron |
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Answer» Is zero is 0 Orbital |
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| 19. |
Write structural formulas of 3,4,4,5- tetramethylheptane. |
| Answer» | |
| 20. |
What is the difference between heat capacity,specific heat,and molar heat |
| Answer» Heat capacity: when temperature is increased by 1K,heat is given to system is known as heat capacity.(x=q/dt),Specific heat: Heat given to the system for increase 1K temperature of 1g of matter is known as specific heat.(S=q/mdT, where m is mass ),Molar heat capacity: Heat is given to the system for increase 1K temperature of 1mol of matter is known as molar heat capacity.(C=q/ndT, where n is mol). | |
| 21. |
What are the critical temparature, pressure and volume? |
| Answer» Critical temperature can be defined as the temperature above which no liquification of gas is absorbed although the pressure is increased and below this temp gas becomes liquid It is given by Tc= 8a/27RbCritical pressure is the allied in 1 mol of gas at critical tempIt is given by Pc=a/27b^2Critical volume is the volume occupied by 1 mol of gas at critical condition It is given by Vc=3b | |
| 22. |
Xe is a inert element so why does it bond with F to form XeF4 |
| Answer» Their are some of the exception .XeF4 is one Of them like u can see that super octet having more than 8 electrons like SF6 etc or incomplete octet like BF3 | |
| 23. |
Find the average atomic mass of an element A ,if its natural abundance are (A35=78%,A37=12%,A38=10%) |
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Answer» Pls say how to find Average atomic mass = f1M1 + f2M2 +… + fnMn where f is the fraction representing the natural abundance of the isotope and M is the mass number (weight) of the isotope?? fractional abundance means %/100 = f amd m= Atomic mass Pls say how to find 35 |
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| 24. |
Define limiting reactant |
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Answer» In simple we can say that after doing the reaction the things which are not used are called limiting reagents The lesser amount of reactant and product are consumed after some time is called limiting reagent It is that reagent which consumed earlier in the reaction. n a chemical reaction, reactant which is present in the lesser amount gets consumed after sometime and after that no further reaction takes place whatever be the amount of the other reactant present. Hence, the reactant which gets consumed, limits the amount of product formed and is, therefore, called the limiting reagent. |
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| 25. |
Who had classified elements as metals and non metals? Detailed information |
| Answer» Lavoisier classified the element metal and non metal.he arrange the element in periodic Table into to group metal and non metal. Drawbacks Her periodic table fail when discovery of matalloid. For more knowledge in chemistry and physics tap my whatsapp...9936718477 only for knowledge purpose | |
| 26. |
What do you mean by Isostructural ? Explain with example. |
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| 27. |
Can a moving cricket ball have wave character or not? Justify your answer |
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| 28. |
Latest paper pattern for class 11th chemistry, physics ?? |
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Answer» The question paper consists of 37 question divided into four section A,B,C and D. Section A comprise 20 question 1 marks, Section B comprise 7 question 2 marks, Section C comprise 7 question 3 marks, and Section D comprise 3 question 5 marks. Exam will be 25sept.Then i will explain |
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| 29. |
Define emperical formula |
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Answer» An emperical formula represents the sinplest whole number ratio of various atoms present in a compound Empirical formula is the smallest / simplest ratio of atom present in compounds Example, H2O2 the empirical formula is HO The\xa0empirical formula\xa0of a compound is defined as the formula that shows the ratio of elements present in the compound, but not the actual numbers of atoms found in the molecule. The ratios are denoted by subscripts next to the element symbols.The empirical formula is also known as the\xa0simplest formula\xa0because the subscripts are the smallest whole numbers that indicate the ratio of elements. |
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| 30. |
What is the ratio of kinetic energy,potential energy and total energy? |
| Answer» The ratio of kinetic energy + potential energy to that of the total energy is 1:1. | |
| 31. |
Explanation of thomson model of atom |
| Answer» U can see this on u tube or google also | |
| 32. |
What are polyatomic ion |
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Answer» You can also see here?https://youtu.be/pFpYo8PXWSE polyatomic ion, is as a molecular ion, is a charged chemical species composed of two or more atoms covalently bonded or of a metal complex that can be considered to be acting as a single uni |
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| 33. |
Drawback of Rutherfords experiment? |
| Answer» Drawbacks of Rutherford’s Model of an Atom·Rutherford’s atomic model could not explain how the moving electrons could remain in its orbit.·Any charged particle during acceleration would give out energy; and while revolving it would lose energy and eventually fall into the nucleus.·This means that the atom would be highly unstable.·But, matter is composed of stable atoms.·Thus, the major drawback of Rutherford’s atomic model was that it could not explain the stability of atoms. | |
| 34. |
What is work function? |
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Answer» Energy required to eject an electron from metal surface The energy used to remove electron |
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| 35. |
Syllabus of half yearly exam chemistry |
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Answer» My school fallow only cbse (J.N.V.) It\'s different for all schools |
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| 36. |
Prove that oxygen has double bonded or paramagnetic nature by MOD |
| Answer» It have 2e- in outer most orbital so share both of 2e- for making O2 Paramagnetc means which have lone pair and after bonding oxygen have 2 lone pair e- so oxygen is paramagnetic in nature | |
| 37. |
Define isotopes and isobars? |
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Answer» Isotopes - Same atomic number but different atomic mass Isotopes .. Atoms of same element which have same atomic no. But different mass no Isobars ..atoms of different element having same mass no. But different atomic no. |
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| 38. |
Define and also explain lattice |
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Answer» Have any problem in chemistry then you tell me It is a energy required to dissociate one mole of one mole of ionic compound into its consituante ions |
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| 39. |
Why we use orditals and subshell in atom to filling electron. |
| Answer» To determine the correct position of electron we use orbitals and subshell | |
| 40. |
Energy level diagram for dioxygen na florine |
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| 41. |
Any one can help me in chemistry ,? |
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Answer» Take my what\'s up no. I am prepare for iit in kota rajasthan Yeah obviously? Yaa off course ? Chemistry is too easy don\'t worry Yes why not |
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| 42. |
Will volume of water in a glass increase when we put some ice cubes in it?? |
| Answer» I think yes but some water cme out in form of water vapor | |
| 43. |
2 solution having pH of 2 and 3 are mixed in equal volume. Calculate the pH of resulting solutions? |
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| 44. |
Can anyone help me with chemistry |
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Answer» Full chemistry is my problem What is ur problem |
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| 45. |
What is the limitations and significance of octate rule |
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| 46. |
discuss the hybridisation and structure of PCl6- |
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| 47. |
Show that for an isothermal expansion of an ideal gas(1) delta u=0(2) delta h=0 |
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| 48. |
If the density of a certain gas at 30 C and 768 torr is 1.35kg /m3 its density at STP would be |
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| 49. |
Lewis symbol.... |
| Answer» | |
| 50. |
What is radial notes |
| Answer» Its type of a note | |