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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. |
What is meaning of constant |
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Answer» something invariable or unchanging: such as. a : a NUMBER that has a fixed value in a given situation or universally or that is characteristic of some SUBSTANCE or instrument. B : a number that is assumed not to CHANGE value in a given mathematical discussion. |
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| 3. |
Calculate the percentage of aluminium in Al2O3. |
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Answer» As SAMPLE is 90 % PURE only so, mass of AL 2O 3=9kgMass of Al =2×27×9/102=4.76kg% of Al in sample 4.76×10/100=47.6 % |
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| 4. |
Iupac names of following compounds |
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Answer» tfrcrxrfrcrfrcrcrc4f5g5t |
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| 5. |
The cell reaction for a galvanic cell is given below:Zn(s) + 2Ag (aq) →Zn- (aq) + 2Ag(s). Calculate the value of cell emf under standard conditions, use data from Table 7.1. |
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Answer» हेलो हाय प्लीज अभिमानी ए सब ट्रेन लिस्ट by |
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| 7. |
Bord order in.coorboxylic acid: |
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Answer» A carboxylic acid is an organic acid that contains a carboxyl group (C(=O)OH) ATTACHED to an R-group. The general formula of a carboxylic acid is R–COOH, with R REFERRING to the alkyl, alkenyl, aryl, or other group. Carboxylic acids occur widely. Important examples include the amino acids and fatty acids. Explanation: hope that HELPS you |
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| 9. |
What is double decomposition reaction. ?¿‽ |
Answer» What is double DECOMPOSITION reactionsalt metathesis reaction, sometimes called a double replacement reaction, double displacement reaction, is a chemical process involving the exchange of bonds between two REACTING chemical species which results in the CREATION of products with similar or IDENTICAL bonding affiliations. Khadijah21 |
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| 10. |
5.85 gm of nacl is dissolved in 250ml of solution calculate ,calculate morality & mass percentage of the solute |
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Answer» Answer: MOLALITY = 0.4 and MASS percentage of SOLUTE = 5.85 × 4 = 2.340 |
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| 11. |
Preparation of colloidal solution of egg albumin |
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Answer» Answer: Break the outer SHELL of the egg by striking it with a glass rod and collect its colour less liquid along with yellow YOLK. DECANT the colourless liquid into another beaker. This colourless liquid is known as egg ALBUMIN. take 15-20 MINUTES. |
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| 12. |
Calculate the molecular mass of Ca3(PO4)2. Step by step explanation. |
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Answer» Answer: heyy Explanation: Ca3(PO4)2 = 3 Ca + 2 P + 8 O • Molar mass of Ca3(PO4)2 = • (3 x 40.08) + (2 x 30.97) + (8 x 16.00) = • 120.24 + 61.94 + 128.00 = • 310.18 g/mol or • 1 mol Ca3(PO4)2 = 310.18 g Ca3(PO4)2 • Example: Calculating Grams from Moles for COMPOUNDS • A student has worked out the details for an experiment that will use 0.115 mol ... hope this helps u pls do thanks and MARK me as brainliest |
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| 13. |
WHAT IS THE FORMULA OF HYDROCHLORIC ACID ???? |
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Answer» HCl is the formula Hope it will help Please Mark me BRAINILIST I WANT to reach EXPERT |
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| 14. |
9.29.39.4configuration.Write the names of isotopes of hydrogen. What isWhy does hydrogen occur in a diatomic form rather than inunder normal conditions?How can the production of dihydrogen, obtained fromincreased?Describe the bulk preparation of dihydrogen by electrolyticrole of an electrolyte in this process ?Complete the following reactions:(i)H, (g) + M.O.(s) - A9.59.6(ii)CO(g) + H, (g)catalyst |
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Answer» Answer: So MANY questions Explanation: |
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| 15. |
Define relative stomic mass of an element. Findout the volume of atomic mass unit in SIsystem. How is this equivalent mass of anelement related to atomic moss. |
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Answer» Answer: Explanation: Atoms of different elements have different masses because different atoms have a different number of subatomic particles i.e neutrons, PROTONS and electrons. Atomic MASS of an element cannot be same as the mass of a single atom of that element because by INVESTIGATION of mass spectrometry it was found that many naturally occurring elements exist in the form of two or more isotopes. Isotopes are the atoms of the same elements having the same atomic number containing the same number of protons but the different number of neutrons and because of this, it possesses different mass number. So, the observed atomic mass of the atom of an element is the average atomic mass of the elements. Average of masses of a different isotope of the same element is taken and then the atomic mass of the element is decided. A formula to calculate average atomic mass:- Example:- Lithium EXISTS in nature in the form of two isotopes Li−6 and Li−7 with atomic masses 6.0151u and 7.0160u and the PERCENTAGES 7.59 and 92.41 respectively. Solution:- Average atomic mass of Li [Atomic mass of Li−6× percentage + Atomic mass of Li−7× percentage]/100 = 100 6.015u×7.59+7.0160u×92.41
=6.939u Hence, the atomic mass of an element is not the same as the mass of a single atom of that element; Atomic mass is average of isotopic mass o atoms. |
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| 16. |
Q13. Choose odd one (a) Iron (b) Common salt (c) Air (d) Coke |
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| 17. |
How will the colors of methyl orange change when dipped in acids, bases and neutral(Level 5-6)substances respectively |
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Answer» Answer: Methyl ORANGE is an indicator. use in the ACID BASE titration. This indicator is used to COLOR obtain |
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| 18. |
J. Which of the following redox couple isstronger reducing agent?a. Li (E° = - 3.05 V) andMg(E' = - 2.36 V)b. Zn(E° = - 0.76 V) andFe (Eº = -0.44 V) |
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Answer» Fe (Eº = -0.44 V) is the right answer. |
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| 19. |
The d orbital which has maximum electronic probability density lying along two axes known as |
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| 20. |
How to find valency? valence of electrons |
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Answer»
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| 21. |
Explain why an aqueous solution of an acid conduct electricty |
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Answer» Answer: plz MARK me brainliest Acids undergo dissociation in aqueous solution to form H+ ions. When electricity is passed through an aqueous solution of an ACID, the H+ ions REACH the cathode and each H+ ion picks up one electron from the cathode to form H2 gas. Because of this REACTION, an aqueous solution of acid conducts electricity. |
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| 22. |
Drive the expression for work done in reversible and irreversible process |
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Answer» I have a few questions about E and what I can FIND on the WAY t is a great IDEA to get some of the |
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| 23. |
Write the chemical formula and functional group of propanoic acid |
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Answer» Propionic ACID has THREE carbon atoms, so its formula is CH 2CH 2COOH. |
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| 24. |
Draw the energy diagram of b2c to photo so with calculation of bond order and magnetic moment |
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| 25. |
Water gas is manufactured by .... ( one word answer) . |
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Answer» Answer: passing steam over red HOT coke. |
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| 26. |
What is meant by homologous series? Write the first four members ofhomologous series that begins withA) CH3CHO B) H-C≡C-HAlso, write down they are general molecularformula. |
Answer» Answer:-
Hope it helps you better!❤ |
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| 27. |
State modern periodic law explain the structure of modern periodic table |
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Answer» Explanation: Modern periodic law STATES that the properties of elements are in periodic functions of their ATOMIC numbers. In the "periodic table", the ATOMS are arranged in the manner with respect to their atomic numbers, electronic configuration, and chemical properties. The seven rows in the "periodic table" are CALLED periods. |
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| 28. |
30. Explain the non-linear shape of H,S andnon-planar shape of PC13 using valenceshell electron pair repulsion theory. |
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Answer» In H2S, S is the main atom which has 2 lone pairs. These lone pairs cause repulsion and move the H-S bond away causing non-linear shape. PCl3 is a TRIGONAL planar shape. The vector addition of the 3 dipole moments GIVES a better of 0. Explanation: I hope this helped!! Oh and BTW, I got this from a website :D |
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| 29. |
sodium salt of which carboxylic acid will be needed for preparation of propane by decarboxylation method? |
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Answer» Hello dear, Answer - Sodium salt of butanoic acid is REQUIRED for preparation of propane. Explanation - - Sodium salt of butanoic acid is TREATED with sodium hydroxide (with CaO) to give propane. CH3-CH2-CH2-COONa + NaOH ---> C3- CH2-CH3 + Na2CO3 Sodium carbonate is formed as byproduct in this reaction. Hope it helps Keep ASKING. |
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| 30. |
Which is the queen of chemical in the chemistry |
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Answer» (C6H6) Benzene is the queen of chemical in CHEMISTRY |
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| 31. |
Which atom has higher shielding effects Li or Na |
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| 32. |
Boiling point of water is 100c at |
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| 33. |
27. Thioalcohols are formed by the reaction of organolithium compounds with |
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| 34. |
Who introduced the terms ‘Groups’ and ‘Periods’ in the Periodic Table first?(a) Dobereiner (b) Newlands(c) Mendeleev (d) Henrychemistry class X |
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| 35. |
(d) Write short note on silver mirror. |
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Answer» Explanation: Tollens' test, ALSO known as silver-mirror test, is a qualitative LABORATORY test used to distinguish between an aldehyde and a ketone. It exploits the fact that aldehydes are readily oxidized (see OXIDATION), WHEREAS ketones are not |
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| 36. |
Write the type of metal oxide films formed duringatmospheric corrosion |
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Answer» Answer: Metals tend to form basic OXIDES, non-metals tend to form ACIDIC oxides, and amphoteric oxides are formed by elements NEAR the BOUNDARY between metals and non-metals Explanation: mark as brainlist |
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| 37. |
UIUIU.TU SUIVE the anomaly, it has been suggested that the electrons in 3d orbitals remainundisturbed and it involves the use of outer 4d orbitals for hybridisation. Thus, this complex issquare planar involving sp’d hybrid orbitals as shown in Fig. 9.3d(a) Cu1XX 1+XA1 X11++O Ö OMo o(b) Cu (II)11 X 14 X11 X41X1spad Hybridisation(c) [Cu(NH3)412+09090 000 çoooo11X11X11 X 1 |
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Answer» bbsgjvcu jjfe6 jye6y. uhgik |
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| 38. |
Calculate the velocity of electron moving in Ist, second and third orbit of hydrogen atom |
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| 39. |
Write the reaction involved in kolbe's electrolytic method to prepare ethane? |
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Answer» POTASSIUM acetate HOPE IT IS CORRECT |
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| 40. |
Drive the equation for change in free energy |
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Answer» Answer: SUMMARY. At constant temperature and PRESSURE, the change in Gibbs free energy is defined as Δ G = Δ H − T Δ S \DELTA \text G = \Delta \text H - \text{T}\Delta \text S ΔG=ΔH−TΔSdelta, START text, G, end text, equals, delta, start text, H, end text, minus, start text, T, end text, delta, start text, S, end text. |
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| 41. |
9. A gas at 240 K is heated to 127°C, Find the percentagechange in the volume of the gas (pressure remainingconstant).with pic |
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| 42. |
10) Balance the following redox equation by half reaction method:Mn0, +S032-Mn2+ + SO42- (Acidic medium) |
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Answer» vfdahsjskbagshzmbsjns |
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| 43. |
*Which of the following compounds contain all the carbon atomsin the same hybridisation state?* 1️⃣ H—C ≡ C—C ≡ C—H 2️⃣ CH₃ —C ≡C—CH₃ 3️⃣ CH₂ = C = CH₂ 4️⃣ CH₂ = CH—C ≡CH |
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Answer» fhhciihchockhckchckhhohchhochhoh |
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| 44. |
Bharat ki jansankhya 85 karod Hai vaigyanik ankMein Kaise likhenge |
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Answer» jdjshwqusiuwgsisjegehdhhgggdtgxfdfgbc |
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| 46. |
fill in the blanks: In order to remove Injustice from to society ____________ works to give justice to the people. |
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Answer» Answer: In order to remove Injustice from to SOCIETY must____________ works to give justice to the PEOPLE. |
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| 47. |
Nor beit can only be transformed from oneii. Energy can neither beform to another.a. created, destroyedb. formed, reversedc invented, discoveredd. none of these |
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Answer» Energy can neither be CREATED nor be destroyed. (option A) This is the law of conservation of energy. Explanation: This is the correct answer to your question, HOPE it HELPS you ☺️ |
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| 48. |
Examples of diatomtic, triatomic and polyatomic molecules |
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Answer» Diatomic-composed of 2 atoms e.g. H2 , N2 , O. Triatomic-composed of 3 atoms e.g. O. Polyatomic-composed of 3 or more atoms e.g. P4 , S. |
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| 49. |
Explain JJ Thompson model |
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Answer» SEE the attached image above HOPE this will help you thanks for ASKING questions to us have a nice day AHEAD |
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| 50. |
Two forces F1=6i-3j and F2 =6i-9j are acting upon a body of mass 5 Kg. Then find the force F3 which when acting on the body will make it stable. |
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