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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. |
Meet : rwa-gzch-gqm join |
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Answer» Don't POST IRRELEVANT QUESTIONS |
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| 3. |
Please answer fast its emergency |
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| 4. |
Calculate the volume occupied by one molecule of water assuming the demity of water be 1.0 g/ml |
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Answer» Answer: please mark as BRAINLIEST and follow Explanation: Calculate the volume occupied by ONE molecule of WATER? (Given density 1 G cm^-3) Volume of 1 molecule of water = 2.989 × 10-23 ≈ 3 × 10-23. |
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| 6. |
Acids that dissolve in water are called _______. |
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Answer» Answer: HEY mate Explanation: The acid which is HIGHLY soluble in water is called HCL ( HYDROCHLORIC Acid) . hope it helps ☺️ |
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| 7. |
It contains 2×6.022×10²³atoms.If so , how many GAM is present in 69 g sodium.?How many atoms are present in it ?How many GAMs are present in each the samples given below.? |
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Answer» f how w you see WOULD app e to I you aioerousaw to iijs will GO so SAUNA |
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| 8. |
Show the formation of Mgcl2 by transfer of electron . what are the ions present in these compounds? |
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Answer» Mg2+ Cl- this is the CORRECT answer |
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| 9. |
How much energy would a gamma ray photon have if it is to split alpha particle into a tritium,3H1,and a proton 1H1?Given masses of 4He2,3H1,1H1 as 4.002603a.m.u,3.016056 a.m.u and 1.007276 a.m.u respectively. |
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Answer» Answer: 19.3656 Mev for a stable nuclei for fission an external SOURCE of ENERGY , here a PHOTON ,is used this Photon would correspond to the binding energy of the the parent nuclei , if energy more than binding energy is given then the decay PRODUCTS would have kinetic energy and EMR however here it'll only split |
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| 10. |
बातमीतयार कराबातमी तयार करा शाला बंद प्रशिक्षण शुरू उपक्रमा bhरगोश प्रतिशत |
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Answer» KYA???????????????????????????????????????????????????????????????/ |
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| 11. |
Can physical and chemical changes occur together to explain your ans ? |
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Answer» Explanation: Yes, in some cases the physical and the chemical changes can occur together. One such EXAMPLE is the burning of candle. The WAX present in the candle changes to liquid state. This means that the change is of physical nature. At the same time, the constituents carbon and hydrogen present in wax react with oxygen of air to form NEW SUBTANCES. This means that a chemical reaction or change is also taking place. |
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| 12. |
Calculate the number of atoms present in each of the sample? (Atomic mass=14 O=16)1 .42 g Nitrogen2. 80 g Oxygen. |
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Answer»
No. of GAM= 80/16 =5GAM No. of ATOMS =5×6.022×10²³
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| 13. |
How many carbon atoms are present in 34.2g of sucrose (C12H22011) Mr = 342)? 4) 6.0 x 1022 C) 7.2 x 1023 3) 3.6 x 1025 D) 3.6 |
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| 14. |
Hello guys please follow and thank |
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Answer» Answer: i LOVE you please GIVE me your number please IAM following you |
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| 15. |
Q.12 How many carbon atoms are present in sucrose (C12H22011) Mr = 342)? A) 6.0 x 1022 C) 7.2 x 1023 B) 3.6 x 1025 |
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Answer» Answer: 7.2x10^23 Explanation: |
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| 16. |
8. Explain the uses of c14 and cobalt60 isotopes. |
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Answer» Explanation: Co-60 is used medically for radiation THERAPY as implants and as an external source of radiation exposure. It is used industrially in leveling gauges and to x-ray welding seams and other STRUCTURAL elements to detect FLAWS. Co-60 also is used for FOOD IRRADIATION, a sterilization process. |
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| 17. |
Answer the question given below and send the option |
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Answer» it is MIXED in any PROPORTION by MASS |
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| 19. |
Determine the value of AGº (kJ/mol).(1 F=96485 C) for the cell consist a standard potentials: Fe (5) -- Fe(aq) + 2e E°= 0.45 V Zn (s) Zn2 (aq) + 2e E° = 0.76 A) 116.8 B) 59.8 C)-116.8 D) - 59.8 E) 29.91 |
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Answer» the answer is -59.8 kJ/mol |
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| 20. |
7.'clatom contain 17 protons and 18 nuetrons. Findout atomic number and mass number of 'cl' atom. . |
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Answer» husiwijqfajaiajbwvavjaushrjekenbwiw |
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| 21. |
Oo xD. waise isme kitne zero h gin k btana xD mere pas time ni h xD |
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Answer» Answer: |
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| 22. |
Find out the mass of 3 moles of oxygen atom? with explanatin if you aswer quikly i mark brainliest |
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Answer» Answer: The molar mass of Oxygen is 16.00 g/mol according to the periodic table. So we have 3 MOLE which mean 3×16=48 GRAM of oxygen is PRESENT in 3 mole of oxygen But when we have Oxygen gas(O2) then 32×3=96g of Oxygen gas is present. Since Atomic mass of oxygen is 32 |
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| 23. |
1.5 نقطة (نقاط) السؤال 11 According the equation: 2H2O+ electricity → 2H2 + O2 A) An electrolytic cell, because it emission energy. B) A voltaic cell, because it releases energy. C) A voltaic cell, because it absorbs energy. D) An electrolytic cell, because it releases energy. E) None of them EO |
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Answer»
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| 25. |
SCIENCE (CB CHEMISTRY H H 0 41. 45. In a vessel 4 g of O2,4 g of H2,4 g of N2 and 4 g of Cl, are present. Which of these gases has highest number of atoms? (A) 02 (B) HZ (C) N2 (D). Cl2 42. |
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Answer» Answer: pls MARK me the brainlist Explanation: |
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| 26. |
Calculate the de-Broglie wavelength associated with an electron with velocity205x107 ms |
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Answer» The WAVELENGTH of an electron is obtained from de-Broglie equation. λ= mv h
= 9.11×10 −31 kg×2.05×10 m/s 6.626×10 −34
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| 27. |
Who discovered electronegative scale |
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Answer» Answer: In SPITE of its LONG HISTORY, an accurate scale of ELECTRONEGATIVITY was not developed until 1932, when Linus Pauling proposed an electronegativity scale which depends on bond energies, as a development of valence bond theory. Explanation: please mark me the brainliest answer |
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| 28. |
What is electrolysis process of clorine manufacture? |
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Answer» Answer: Chlorine can be manufactured by the electrolysis of a sodium chloride solution (brine), which is KNOWN as the Chloralkali process. The production of chlorine RESULTS in the co-products CAUSTIC SODA (sodium hydroxide, NaOH) and hydrogen gas (H2). These two products, as well as chlorine itself, are HIGHLY reactive. |
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| 29. |
Aluminum oxide is an example of__________oxide? |
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| 30. |
Use the above attachment to download |
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Answer» okk Explanation: THANKS 4 it MARK as BRAINLIEST |
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| 31. |
Which one of the follwing has low vapour pressureA ethyl etherB carbon tetra chlorideC IsopentaneD Ethnol |
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Answer» d Explanation: |
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| 32. |
HO CHEMI 41. In a vessel 4 g of O2,4 g of H2,4 g of N2 and 4 g of Cl, are present. Which of these gases has highest number of atoms? (A) 02 (B). H2 (C) N2 (D). Cl2 |
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Answer» Answer B Explanation: No. of moles (H2)=4/2=2 No. of moles (N2) = 4/28 =0.143
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| 33. |
व्हाट इज द इलेक्ट्रो सेल्स प्रोसेस ऑफ क्लोरीन मैन्युफैक्चर?? |
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Answer» ?????????????????????????????????????????????????????????????? |
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| 35. |
Which of the following is a true statement for a pure substance or a compound? a. The elements in a compound are present in a definite proportion by weight. b. It can be broken down into a simpler type of matter (elements) by chemical means but not by physical means. c. Properties of a compound are an average of the properties of its constituents. |
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Answer» The ELEMENTS in a COMPOUND are PRESENT in a definite PROPORTION by weight. Explanation: |
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| 36. |
Zdg quir scuBad girl |
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Answer» you are very bad girl Explanation: |
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| 37. |
Which is not a radian conpound?(a) Urenium (b) Radium (c) Zirconium a) lead |
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Answer» Answer: c is correct answer DEAR Explanation: |
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| 38. |
M tko 1sal k bacha dikhta hu ky xD jo baby bol rhi ho xDmere sath flirting Krna is impossible agar mra mood na ho to xD(⌐■-■) |
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Answer» kya kar rhe ho? xd |
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| 39. |
How prepare sulfer dioxide form sulfite and sulfide |
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Answer» Answer: the LABORATORY, sulphur dioxide is prepared by the reaction of METALLIC sulphite or a metallic bisulphite with dilute acid. For EXAMPLE, a reaction between the dilute SULPHURIC acid and sodium sulphite will result in the formation of SO2. |
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| 40. |
When a certain metal was irradiated with light of frequency3.2 x 1016 s-1, the photoelectrons emitted had twice thekinetic energy as did the photoelectrons emitted whenthe same metal was irradiated with light of frequency2.0x1016 s-1. Calculate threshold frequency for the metal.[Hint. K.E. = hv -hvo; hví - hvo = 2 (hv 2 - hvo);or Vo = 2v2 - Vi] |
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Answer» Answer: Applying photoelectric EQUATION, KE=hv−hv 0
or (v−v 0 )= h KE
Given, KE 2 =2KE 1
v 2 −v 0 = h KE 2
...(i) and v 1 −v 0 = h KE 1
...(II) Dividing equation (i) by equation (ii), v 1 −v 0
v 2 −v 0
= KE 1
KE 2
= KE 1
2KE 1
=2 or v 2 −v 0 =2V 1 −2v 0
or v 0 =2v 1 −v 2 =2(2.0×10 16 )−(3.2×10 16 ) =8.0×10 Hz. |
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| 41. |
Koi iske 1000 kra do please____☺️ |
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| 42. |
Compound A when dissolved in water gives compound B which is used in white washing. Compound B reacts with carbon dioxide to form a white precipitate of compound C . Identify compounds A ,B and C . Also write the equations involved. please answer fast |
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Answer» Explanation: Compound A reacts with water and GIVES compound B which is used in whitewashing. Compound A + water → Compound B (used in white washing) The substance used for white washing is CaO (Calcium Oxide). Therefore, compound A is Calcium oxide having formula CaO. \sf{CaO+H_2O\rightarrow Ca(OH)_2}CaO+H 2 O→Ca(OH) 2
So, compound B is Calcium Hydroxide (another name - Slaked lime) having formula Ca(OH)2. The above reaction is an example of a Combination Reaction. Because in it two or more reactants combine to form a single product. Now, compound B reacts with carbon DIOXIDE to form a white precipitate of compound C. Compound B + Carbon dioxide → Compound C (which forms white precipitate) \sf{Ca(OH)_2+CO_2\rightarrow CaCO_3+H_2O}Ca(OH) 2 +CO 2 →CaCO 3 +H 2 O Therefore, compound C is Calcium Carbonate. The above reaction is an example of a DOUBLE Displacement Reaction. Because the exchange of ions takes PLACE. Also, known as PRECIPITATION Reaction, as the formation of precipitate takes place. |
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| 43. |
Molecule which has different kinds of atoms. examples |
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Answer» Explanation: Molecules of COMPOUNDS have atoms of TWO or more different elements. For example, water (H2O) has three atoms, two hydrogen (H) atoms and one oxygen (O) atom. Methane (CH4), a common greenhouse gas, has FIVE atoms, one of carbon (C) and four of hydrogen (H please MARK me as Brainlist |
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| 44. |
Oo xD thanks xDmaska with extra cheese xD kisi ur ko marna xD(⌐■-■) |
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Answer» Answer: HELLO xd Explanation: |
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| 45. |
Which of the following is/are true about hetrogenous mixtures? a. An opaque suspension is a hetrogenous mixture. b. Collodial solutions are hetrogenous mixtures. c. A mixture of two miscible liquids is a hetrogenous mixture. |
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| 46. |
Write the names of the following compounds |
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Answer» Explanation: a) ammonium SULPHATE (C) Ferrous sulphide (e) ammonium hydroxide (g) MERCURIC OXIDE (i) zinc sulphide |
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| 47. |
For silver metal, threshold frequency is 1.13 X 1017-1What is the maximum energy of the photoelectronsproduced by shining ultraviolet light of wavelength1.5 nm on the metal ? |
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| 48. |
H3C -C=C-ch2br Ch3 ch3 |
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Answer» Explanation: Straight chain HYDROCARBONS are named according to the number of carbon atoms: CH4, METHANE; C2H6 or H3C-CH3, ETHANE; C3H8 or H3C-CH2-CH3, propane; C4H10 or H3C-CH2- CH2-CH3, butane; C5H12 or CH3CH2CH2CH2CH3, PENTANE; C6H14 or CH3(CH2)4CH3, hexane; C7H16, heptane; C8H18, octane; C9H20, nonane; C10H22, CH3(CH2)8CH3, . |
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| 49. |
The compounds that contains on electrovalent bond,three covalent bonds and one coordinate bonds in it, the name of the compounds is.1. ammonia 2. water3. ammonium chloride 4.methane |
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Answer» Answer: zpnhjwxgvx G00D M0RNING G!RLS J0!N F0R PLAYING DARE GAME J0!N ASAP zpnhjwxgvx Explanation: |
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| 50. |
Pagal kyu xD cutiya, mental,kamina,etc etc bhi bolo xDjinga lala huuu hu xd |
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Answer» THEK ha |
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