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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. |
Is called diamagnetism and the substance be diamagnetic)(11 10 11 12Fig. 1.47 : Paired electronsFor example : Zn, Cd, H2O, NaCl, etc.Q. 101. Explain paramagnetism. (2 marks) OR*What aare paramagnetic substances? Giveexamples.(2 marks)Ans.(1) The magnetic properties of a substance arise due tothe presence of electrons.the nucleus |
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Answer» ong>ANSWER: |
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| 2. |
Which of the following are compound. stainless steel ,hydrocloric acid ,bronze,graphite |
| Answer» ONG>ANSWER: | |
| 4. |
Draw a neat labelled diagram of distillation / fractional distillation to illustrate the separation of two miscible liquids. PLEASE HELP FAST................... |
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Answer» ong>Answer: . ALCOHOL and water are MISCIBLE liquids but both are having different BOILING points i.e. 78°C & 100°C respectively. So for their separation FRACTIONAL distillation has to be carried out. The MIXTURE of alcohol and water is heated in a distillation tank fitted with a fractionating column. |
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| 5. |
The properties of a molecule made up of two or more atoms depends on |
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Answer» ong>The chemical formula and the STRUCTURE of a molecule are the TWO important factors that determine PROPERTIES of a molecule. |
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| 6. |
How to find the reciprocal proportion of compounds PO3 and PH4 |
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Answer» ong>Answer: Law of RECIPROCAL proportions:- When two different elements combine with the same mass of a 3rd element, the ratio of masses in which they do so must be same or multiple of the mass ratio in which they combine with each other. To balance a chemical EQUATION, enter an equation of a chemical reaction and press the Balance button. The balanced equation will appear above. Use uppercase for the first character in the element and lowercase for the second character. Examples: Fe, Au, Co, Br, C, O, N, F. Ionic charges are not yet SUPPORTED and will be ignored. Replace immutable groups in compounds to avoid ambiguity. For example, C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but XC2H5 + O2 = XOH + CO2 + H2O will. |
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| 7. |
Cryoscopic constant depends upon a, nature of solvent b. Nature of solute |
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Answer» ong>Answer: |
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| 8. |
guyz plzz mere second id ke ans ko thanks kardo agar aaplogo ne uss id par thanks diya toh me yeh dono id se thanks dungi plzz50 thanks plzz guys I'd mere second following h plzz kar do thanks... |
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Answer» ONG>ANSWER: KEEP HELPING OTHERS...! |
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| 9. |
Why atomic size decreases from left to right |
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Answer» ong>Explanation: Within a period, PROTONS are added to the NUCLEUS as electrons are being added to the same principal energy level. These electrons are gradually PULLED closer to the nucleus because of its INCREASED positive charge. Since the force of attraction between nuclei and electrons increases, the size of the atoms decreases..... |
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| 10. |
two particles of masses m and 2m have equal kinetic energies .their de-Broglie wavelengths are in the ratio is... |
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Answer» ONG>ANSWER: As we know, λ=h/mv λ= 2mE
h
as the kinetic energy of both PARTICLES are same so λ∝ m
1
λ 2
λ 1
= 1 2
Explanation: i hope it is helpful for you plz Mark me as brainlist please plz plz plz plz plz plz plz plz plz plz |
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| 11. |
How much marble of 96.5% purity would be required to prepare 100 litres of carbon dioxide at STP when marble is acted upon by dil HCL? Answer fast please.. |
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Answer» ong>Explanation: 22.4 L of C02 at N.T.P. is OBTAINED from CaC03 = 100g 100 L of C02 at N.T.P. will be obtained from CaC03 100 = —x 100 = 446.4 g 22.4 446.4 x 100 mpure marble required = 462.6 g• 96.5 0 63.Jul 4, 2019 |
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| 12. |
Why is PtCl2(en)2 neutral complex?? |
| Answer» ONG>Answer: | |
| 13. |
an air bubble of vol 1ml is at the bottom of river at 27°C and at 10atm pressure. calculate its volume at the top of the river if temp at the top 27°C |
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Answer» me of are bubble=1 vol temperature of river -27°C=27+273=300k temperature at top is as same as top |
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| 14. |
How much marble of 96.5% purity would be required to prepare 100 litres of carbon dioxide at STP when marble is acted upon by dil HCL? |
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Answer» ONG>Answer: 22.4 L of C02 at N.T.P. is obtained from CAC03 = 100g 100 L of C02 at N.T.P. will be obtained from CaC03 100 = —X 100 = 446.4 G 22.4 446.4 x 100 mpure marble required = 462.6 g• 96.5 0 63. |
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| 15. |
सांद्रता को व्यक्त करने की कौन सी विधि ताप पर निर्भर नहीं करती है |
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Answer» ONG>ANSWER: Gihtiy77iuguuguuuuuuhhuuggfyuyggguty |
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| 16. |
E. Molar volume of gas. |
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Answer» ONG>ANSWER: plz mark my answer as brain list please and don't forget to follow me please I REQUEST you all the mates |
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| 17. |
Explain hund's rule with an example |
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Answer» ong>Explanation: Hund's rule : Every orbital in a subshell is singly occupied with ONE ELECTRON before any one orbital is doubly occupied and all electrons in singly occupied orbitals have the same spin. The IMAGE attached is the example of hund's rule. |
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| 18. |
In a chemical reaction, the compound (X) Can rather conveniently be converted to another compound (Y) which is Which of the following is/are suitable for this purpose. (1) Trans isomer of (X) can be treated with anhydrous AlCl3. (2) Cis isomer of (X) can be treated with HF. (3) Trans isomer of (X) can be treated with conc.H3PO4. (4) Cis isomer of (X) can be treated with NaOH. |
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Answer» LOVE u hsusinshsusosnshshhduddkidhdishd KM BHI snduisnshsjsjsjsusjdbbdsuhsjshdjsbesgshsbmejdhsysbvejsbshsbshshshshshsjs |
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| 19. |
What is the formula of steel? |
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Answer» ong>Answer: Steel is made up of CARBON and IRON The carbon is used 0.002℅ Tu 2.1% The iron is used 3% to 4% I give photo of chemical FORMULA of Steel..... |
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| 20. |
Valency answer for 1st 30 elements with steps |
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Answer» ong>ANSWER: |
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| 21. |
Does Sb3 has a higher boiling point than NH3 |
| Answer» ONG>Answer: | |
| 22. |
Electron in HC104Number ofnon -bondimolecule is |
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Answer» ong>ANSWER: |
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| 23. |
'The presence of non-volatile impurity lowers the freezing point of a liquid.' Explain the statement |
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Answer» ONG>Answer: Explanation: Explanation. The freezing POINT is the temperature at which the liquid solvent and solid solvent are at EQUILIBRIUM, so that their vapour pressures are EQUAL. When a non-volatile solute is added to a volatile liquid solvent, the solution vapour pressure will be lower than that of the pure solvent. |
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| 24. |
No of non bonded electron pair in pcl3 |
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Answer» P-Cl bonds are BASICALLY formed when the sp3 hybrid orbitals overlap with 3p orbitals of chlorine which are singly occupied. Further, each chlorine atom also holds 3 lone PAIRS. All in all, if we LOOK at PCl3, there are 3 electron pairs, 3 BOND pairs and one lone pair of electrons |
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| 25. |
. बालू के एक कण की त्रिज्या 1.6 x 10-4 मी है। इस कण की त्रिज्याऐंग्स्ट्रॉम में होगीl |
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Answer» ong>Answer: TYPE in English MARK me as BRAINLIST and FOLLOW me |
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| 26. |
Zinc oxalate the formula of criss cross method?? |
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Answer» ONG>Answer: Explanation: zinc VALENCY 2 oxygen valency 1 Criss cross it then you will get ZNO 2 |
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| 27. |
बीसीसी लेटेस्ट में अणुओं की संख्या कितनी होती है एक दो तीन या चार |
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Answer» ONG>Answer: Explanation: MARK me as BRAINLIST and FOLLOW me for more answers |
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| 28. |
Which one of the following alkali metal ion posses maximum degree of hydration (A) Lit(B) Na+(C) K+(D) Os+ |
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Answer» ONG>Answer: Explanation: |
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| 29. |
On dissolving moderate amount of sodium metal in liquid NH, at low temperature, which one of the following does not occur (A) Blue coloured solution is due to ammoniated electrons(B) Liq NHbecomes good conductor of electricity(C) Liq NH2 solution is paramagnetic(D) Liq NH3 solution is diamagneticOA |
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Answer» ong>Explanation: On dissolving moderate amount of sodium metal in liquid NH, at low temperature, which ONE of the following does not occur:- answer :- OPTION (d) .............(d) Liq NH3 solution is diamagnetic. hope it will help you ....... plz mark me as brainliest yrrrr. |
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| 30. |
सी सी बैटिस में मांगों को सेवल्या013५ |
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Answer» ONG>Answer: fhfggffffffffffffffffff well if web in em of ANF well of em TX em of |
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| 31. |
B 2. Which compound form linear polymer duA. H20B. NH3C. HBOD. HCI+ Answer - Click Here: |
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Answer» ong>Answer: NH3 Explanation: NH3 forms linear POLYMER due to hydrogen bonding..... Plz MARK me as BRAINLIEST |
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| 32. |
How do you find the group number on the periodic table of elements? |
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Answer» ong>ANSWER: Explanation: The periodic table ALSO has a special name for its vertical columns. Each column is CALLED a GROUP. The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons. |
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| 33. |
A metal x forms coloured ions, is paramagnetic and is used as a catalyst. Predict the block to which the metal belongs. |
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Answer» ONG>ANSWER: TRANSITION metals mark me as BRAINLIEST............. |
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| 34. |
बीसीसी बैटिस में अणुओं की संख्या13 |
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Answer» ONG>Answer: 3 PLEASE MARK me as the BRAINLIEST |
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| 36. |
3.6 gm of HCl are dissolved in 2 liter s of solution find the molarity of solution? |
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Answer» ong>ANSWER: Explanation: molarity = no.of moles of solute /volume of solution no.of moles = given MASS / GMM =3.6/36.5 ≅ 0.1 GMM OF HCL= 1+35.5 =36.5 MOLARITY= 0.1/2 =0.05 M |
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| 37. |
What happened when chlorine gas passed in 2-nitro aniline with ammonium thiocyanate in cooling reaction |
Answer» ONG>ANSWER:NH3+3Cl2→3HCl+NCl3. If here AMMONIA is taken in excess then ammonium CHLORIDE is formed. |
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| 38. |
हिस्टटीप जामसूक्ष्महै,ककाबेचकाकिस्टलीयू जाकएकसीसाबीसीसी |
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Answer» ong>Answer: |
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| 39. |
According to fazan the favouralble conditions for the formation covalant bond is |
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Answer» |
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| 40. |
Perform the following calculations up to proper number of significant figures 1.20*10 ^-6 ➕ 6.00*10^-5 |
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Answer» ONG>Answer: 6.12×10^-5 Explanation: 1.20× 10^-6 + 6.00×10^-5 10^-5(1.20×10^-1 + 6.00) 10^-5(0.12 + 6.00) 6.12×10^-5 |
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| 41. |
Convert propanone to tertitary butylalchol |
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Answer» ong>ANSWER: Acetone is converted to tert BUTYL alcohol by Grignard reagent. The diagram will help you UNDERSTAND the WHOLE reaction. It has also mentioned the catalyst that has been used in the process of conversion.Explanation:hope it helps you mate and please thank me for the answer Mark as the brainlest please |
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| 42. |
Help 11 ch1 chemistry questionMASS % |
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Answer» ONG>Explanation: ANSWER is 6699. pls MARK as BRAINLIEST |
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| 43. |
1) which is limiting agent How much product which is excessHow much N2+ 3H₂ - 2 NH31 ( 200gN2 200H2) |
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Answer» ONG>ANSWER: I don't UNDERSTAND your QUESTION |
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| 44. |
Which of the following order is not correct as per the property indicated against it (A) Li |
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Answer» ong>ANSWER: |
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| 45. |
The de Broglie wavelength of an electron in an orbit representedby the orbital diagram is(A) 10A |
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Answer» l = h/mv and mvr=nh/2π so l = 2πr/n r value can be FOUND be 0.529×n² A° formula now you can substitute and find out the ANSWER |
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| 46. |
In aqueous medium, among alkali metals the most and least reducing agents are respectively (A) Cs and Li(B) Li and Na(C) Li and Cs(D) Na and Li |
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Answer» ong>Answer: A option is CORRECT |
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| 47. |
Lithium halides are covalent. This is because of (A) High hydration enthalpy of Li ion(B) High polarisation capability of Li ion(C) Large size of Li+ ion when compared to other elements in the same(D) All of these |
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Answer» ONG>Answer: A option is CORRECT answer will HELP you |
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| 48. |
4. Select the odd one with reasons. a. Fe, Cu, Al, Zn, Mgb. AgNO3, Cu(NO3)2, KNO3, Pb(NO3)2, Zn(NO3)2c. C, CO, CO2, CO3d. MnO4, PO4, SO4, Cr04e. Neutron, Argon, Krypton, Helium.Give the answer |
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Answer» ONG>ANSWER: e is ODD because NEUTRON is not any element |
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| 49. |
A) A sample of nitrogen gas occupies a volume of 320cm at S.T.P calculate its volume at 66'c and 0.825 barpressure. |
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Answer» y to say that i don't know this answers soo SORRY Don't KEEP in mind and make me BRAINLIST PLEASE please
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| 50. |
Lithium halides are covalent. This is because of (A) High hydrationenthalpy of Li ion(B) High polarisationcapability of Li ion(D) All of these(C) Large size of Li+ ionwhen compared toother elements in thesame group |
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Answer» ong>Answer: Lithium HALIDES are covalent in nature,because Li + ion due to its smaller size than other alkali metalcations exerts stronger POLARIZING power TOWARDS an ion and therefore develops covalent character in the molecule (Fajan's rule). Both Assertion and Reason are correct and Reason is the correct explanation for Assertion |
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