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. |
13. What is screening effect ? How does it affect the nature of bonding between two atoms? |
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Answer» Answer: The PHENOMENON which occurs when the nucleus reduces its force of attraction on the valence electrons due to the presence of electrons in the inner-shell. This is KNOWN as a screening effect. ... As the attraction between the nucleus decreases, the repulsion increases between the inner electrons and OUTER electrons. |
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| 2. |
B)(CH3)2 CO nameing |
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Answer» Answer: ETHANOL is the CORRECT answer and MARK me as brainlist and follow me |
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| 3. |
3. A glowing splinter brought in a jar full of oxygen willa. stop glowing at onceb. burns into flamesc. give out smoked. none of these |
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| 4. |
0.24g of volatile gas , upon vapourisation , gives 45 mL vapour at STP . what will be the vapour density of the substance?[density of H2 =0.089] |
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Answer» Answer: Thanks the other hand if you have any QUESTIONS please LET us KNOW if there are not the |
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| 5. |
3. After fixing the mechanical teacher, the big screen displayed(a) Margie's face(b) All the lessons and questions asked(c) A real book(d) None of the abovethe real book do?11 |
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Answer» this is the answer |
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| 6. |
(A) Half life period of the first order reaction is 15 minutes. Calculate the timerequired for 90% completion. |
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Answer» Answer: 20000000000000000000000 Explanation: MARK as BRAINALIST |
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| 7. |
How to prepare m-nitrophenol from benzene |
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Answer» Explanation: m-Nitrophenol can be PREPARED by diazotizing m-nitroaniline and subsequently heating with a large VOLUME of WATER;1 by treating benzene with MERCURY nitrate and nitric acid in an atmosphere of carbon dioxide;2 and by boiling m-nitrophenetole (from phenacetin by nitration, hydrolysis, and diazotization in alcohol) with ... |
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| 8. |
Calculate the number of proton at NTP in 2.8l of oxygen gaswhich contain only O16 |
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| 9. |
Jitni jaldi ho sake sab delete delete kar do yah faltu rap Hai Life Barbad karke rakh degam |
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Answer» Answer: Explanation: Sorry what is the PROBLEM you are facing. CONTACT to the mods to SOLVE it |
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| 10. |
I choosethatnismthe compound from the followingwillreact fastest by SN mecha. |
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Answer» snsheve kk it's sjksgsnsks HG d bb ebsshssjbsgsssjs HI shsnshzhsjushzvzjjssjsbnzdx just gdhdjjdhhdhhdhdhjdjjhddggfjs KM db djvdjdhdhjdjsfehej |
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| 11. |
1. Draw shapes of 2s and 2p orbitals. |
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Answer»
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| 12. |
Hai map sis are you here |
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Answer» .......(•‿•)(•‿•)(•‿•) ........◉‿◉◉‿◉◉‿◉ ..........(✷‿✷)(✷‿✷)(✷‿✷) |
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| 13. |
Periodic table has 7 ---------? |
Answer» ROWS........... |
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| 14. |
Write scientific notation for adding 5.55×10⁴ and 6.55×10³ |
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Answer» Answer: 6.20 × 10⁴ Explanation: [6.55× 10³= 0.655×10⁴] 5.55× 10⁴ + 0.655× 10⁴ = (5.55+0.655) × 10⁴ = 6.20×10⁴ |
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| 15. |
Things become weak due to (a) corrosion (b) expansion (c) contraction |
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Answer» corrosion Explanation: |
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| 16. |
Calculate the number of atoms in FCC unit cell |
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Answer» Explanation: A FCC unit cell contains four ATOMS: one-eighth of an atom at each of the eight corners (8×18=1 8 × 1 8 = 1 atom from the corners) and one-half of an atom on each of the six FACES (6×12=3 6 × 1 2 = 3 atoms from the faces). |
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| 17. |
Define estrification with example..... |
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Answer» Explanation: Some ESTERS can be prepared by esterification, a reaction in which a carboxylic acid and an ALCOHOL, HEATED in the presence of a mineral acid catalyst, FORM an ester and WATER: The reaction is reversible. As a specific example of an esterification reaction, butyl acetate can be made from acetic acid and 1-butanol. |
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| 18. |
magsaliksik ng epiko ng dalawang bansa sa kanluran at paghambingin gamit ang venb diagram .pagkatapos ay sumulat ng maikling sanaysay tungkol sa pananaw mo sa pagkakaiba at pagkakatulad ng mga ito |
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Answer» Answer: magsaliksik ng epiko ng dalawang bansa sa kanluran at paghambingin gamit ANG venb diagram .pagkatapos AY sumulat ng maikling sanaysay tungkol sa pananaw MO sa pagkakaiba at pagkakatulad ng MGA ito Explanation: please don't forget to make me a brainlist |
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| 19. |
Explain the tetravalency ofcarbon. |
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Answer» Answer: As carbon possesses ATOMIC number 6, it means that carbon atom has a TOTAL of 6 electrons. ... Thus, carbon is tetravalent (It means valency of carbon is 4.) and can form 4 covalent bonds with not only other atoms but other carbon atoms as WELL. This is called tetravalency of carbon. hope it helps |
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| 20. |
1. A tube of sugar solution 20 cm long is placed between crossed nicols and illuminated withlight of wavelength 6 x 10-4 If the optical rotation produced is 13º and the specific rotation is65°, determine the strength of the solutionA/0.1 g/ccB. 0.2 g/ccC. 0.9 gccD. 1.0 g/cc |
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Answer» A TUBE of sugar solution 20 cm long is PLACED between crossed nicols and illuminated with LIGHT of wavelength cm If the optical rotation PRODUCED is and the specific rotation is determine the strength of the solution Answer A 0.1g/cc |
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| 21. |
अक-03Find the coordinates of the point which is on Y-axis andwhich is equidistant from points (5,-2) and (3,4).6 मूल बिंदु से होकर जाने वाली उस सरल रेखा की प्रवणता ज्ञातकीजिए जो बिंदु (2.3) से भी होकर जाती है।अंक-02Find the slope of the line which passes though origin andalso passes though point (23) |
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| 22. |
5.6l of methane gas is ignited in oxygen gas. Calcate the number of moles of carbondioxide formed? |
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Answer» Explanation: No.of MOL of CH4 = 5.6/22.4 = 0.25 mol According to the stoichiometry of the reaction 1 mol of CH4 = 1 mol of CO2 Hence, 0.25 mol of CH4 = 0.25 mol of CO2 |
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| 23. |
40,-80, 160,-320,...?? |
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Answer» -200 is the answer Explanation: I THINK this is the answer ACCORDING to my CALCULATIONS |
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| 24. |
In radioactive element if half life of carbon is 78 N0 is 100 and Nt is 88 then find Lambda and t |
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Answer» Answer: fskgsjhsjjsgskhsgj you can come over you will be distinguished me know when your ready you all the time table of CONTENTS are the kids coming in the mail to you all as you can come to my place for a QUESTION for a question for a question tag and the other one and the other TWO were you thinking for a few minutes to talk about this tomorrow morning madam kindly send me ans the morning of when we get it done before you get it in time to school find the morning of the morning and you all are you GUYS doing ok shifali you can get a question for a question about how much we run out and grab you a song for you and the other is called a question about how much we can see the house in a few weeks to get it to you by mam we can get together for LIVING with smart and beautiful you can get it in which case I'll and you can see by mam we are the kids doing ok just send kar mala send it to |
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| 25. |
Water exists in all the three states . discuss |
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Answer» second freezed form third vapour form |
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| 26. |
9. Which alcohol will undergo dehydration easily to give alkene in the presence of acidic dichromate(A) Primary alcohol(B) Secondary alcohol(C) Tertiary alcohol(D) All above |
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Answer» d) All above This is your CORRECT answer |
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| 27. |
Give the sets of electrolytes which Can beused to find the equivalent Conductance ofi) CH3COOH ii) NH4 oH iii) KOH iv) H2O |
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Answer» ndbdbdbdbdhdndn dndndfbbfbdndndndndbddndn d dfnnd d ddnd |
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| 28. |
3 Drow a figure showing the path ofof light at an anglefrom ar to water, send pic of diagramroyenkering |
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| 29. |
Ac93) Which of the following alkane obtain whensodium salt of propanoic acid is treated withsoda-lime ?(a) Methane(b) Ethane(c) Propane(d) Butane |
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Answer» Propane Explanation: |
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| 30. |
05 Identity 'A' and 'B' in following reactions and rewrite C2H50H no metal A) C2H3Br B) |
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Answer» Answer: Simultaneous ACE (Atmospheric Chemistry Experiment) upper tropospheric CO, C2H6, HCN, CH3Cl, CH4 , C2H2 , CH30H, HCOOH, and OCS MEASUREMENTS show plumes up to 185 ppbv (10 (exp -9) per unit volume) for CO, 1.36 ppbv for C2H6, 755 pptv (10(exp -12) per unit volume) for HCN, 1.12 ppbv for CH3C1, 1.82 ppmv, (10(exp -6) per unit volume) for CH4, 0.178 ppbv for C2H2, 3.89 ppbv for CH30H, 0.843 ppbv for HCOOH, |
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| 31. |
In radioactive element t1/2=78h No =100 Nt=88 then find Lambda and t |
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Answer» Answer: SRY but gotta do this..!! |
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| 32. |
17. A hydrocarbon which is liquid at room temperature de colourizes aqueous solution of bromine. The formula of the compound is:(A) C2H2(B) C2H4(C) C7H16(D) C10H20 |
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| 33. |
find the empirical and molecular formula for the compound which contains 51.28%of carbon,9.40% of hydrogen 27.35% of oxygen and 11.97%g nitrogen molar mass of the compound is 234g/mol |
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Answer» Answer: Here is the CORRECT answer Explanation: Divide all the percentages with atomic mass, Carbon 49.2 12 49.2
=4.1 3 Hydrogen 9.68 1 9.68
=9.68 9 Nitrogen 19.9 14 19.9
=1.4 1 Oxygen 21.22 16 21.22
=1.3 1 Empirical FORMULA will be C 3
9
NO (Emperical formula wt) n
=146 (75) n
=146 or n=2, Molecular will be C
H
N 2
O 2
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| 34. |
Write structure qnd common name of 2-methyl propane |
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Answer» Isobutane, ALSO known as i-butane, 2-methylpropane or methylpropane, is a chemical compound with molecular formula HC(CH3)3. It is an isomer of butane. Isobutane is a colourless, odourless GAS. It is the simplest ALKANE with a tertiary carbon. |
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| 35. |
Give reason Atoms are electrically neutron |
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Answer» Explanation: Atoms are electrically neutral because they have equal NUMBERS of protons (positively CHARGED) and electrons (negatively charged). If an atom gains or LOSES ONE or more electrons, it becomes an ion. hope it helps |
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| 37. |
Percentage by mass of oxygen in copper trioxocarbonate (vi) |
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Answer»
11.181 is ANSWER of this QUESTION
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| 38. |
Oxygen is paramagnetic. |
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Answer» Electrons in OXYGEN are paired so oxygen should be diamagnetic but yet oxygen is PARAMAGNETIC last two electrons GO into SEPARATE , degenerate.. |
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| 39. |
Explain the chemical reactions with the help of balanced equations()Dilute HCI (hydrochloric acid) reacts with sodium bicarbonate |
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Answer» qwertyuiopasdfghjklzxcvbnm Explanation: qwertyuiopasdfghjklzxcvbnm |
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| 41. |
Full hand mehandi design for karva choth small girl made see this video and friendschannel name is bashu and divenshi vlogsapne mom ke liye apne sister ke liye see |
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Answer» OHK... |
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| 42. |
Date:Page:*How long will it take 600ml of H2 gas todiffuse through a porous portion, If 300ml of O2gas diffuse through it in 10 minutes under identical condition? |
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Answer» Explanation: ANSWER According to Graham's law of diffusion, RATE of diffusion = t V
∝ M
1
[Here, M= molecular mass, V= volume and t= TIME] Thus, for H 2
gas, 200
=k 2
1
......(i) For O 2
gas, t 50
=k 32
1
........(II) where k is PROPORTIONALITY constant From equations (i) and (ii), we get 30×50 200×t
= 2
32
t= 200 16
×30×50
= 4 4×30
=30 min |
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| 43. |
nanika 26 yaar mein janty hu ki ye padahi ka aap hai falty ka yeelog meet ka link bhej dete hai yaar mujhe to cahiye rahata hai free points to mein aise likhti hu ki free points mil jata hai |
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Answer» Answer: Radioactive elements are made up of atoms whose NUCLEI are unstable and GIVE off atomic radiation as PART of a process of ATTAINING stability. |
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| 44. |
93. Which of the following alkane obtain whensodium salt of propanoic acid is treated withsoda-lime ? |
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Answer» butane Explanation: HOPE THIS HELPS YOU!!!! IF YOU LIKE THIS ANSWER PLS MARK ME AS THE BRAINLIEST !!! AND DO FOLLOW ME!!! |
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| 45. |
Show that the molar volume of an ideal gas at NTP is 22.4L |
Answer» It is ALSO known that volume occupied by 1 mole of gas at NTP is 22.4 L. Substituting P=1 atm, T=293 K, R=0.0821 L atm K−1 mol−1, we get V=24.05 L as the molar volume.hope it helps |
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| 46. |
फ्रेंड लिस्ट ऑफ सोशल समतापी बकरों को समझाइए |
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Answer» ............... |
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| 47. |
1. A flask contains 4.4 g of CO2 gas.a. Calculate how many moles of CO2 does it containsb. How many molecules of CO2 present.c. How many atoms of oxygen present.2. Calculate the number of SO3 molecule present in 44 g.3. Calculate the number of molecules of sulphur (S8) present in 128 g of sulphur.4. Which has more moleculea. 10 g of N2b. 10 g of O25. Which has more atomsa. 10 g of Cb. 10 g of CO26. Calculate the number of oxygen atoms present in 120 g of Nitric acid.7. Calculate the number of aluminium ion in 0.051 g of aluminium oxide.8. Calculate mass of 1 oxygen atom.9.10. Calculate the mass of 1.2044 x 1023 –molecules of O2.11. How many grams of sodium will have3 the same number of atoms as 6 g of magnesium?12. The mass of one molecule of a substance is 4.65 x 10-23 g. what is its molecular mass? Whatcould this substance be? |
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| 48. |
. Prove that half life period of a zero order reaction is proportional to intialConcentration of reactant. |
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Answer» EXPLANATION: correct. t1/2 is proportional to the initial CONCENTRATION of the REACTANT in case of a ZERO order reaction. For a zero order reaction -(Rt) = K.t + (Ro) so T1/2 = 1/2K [Initial concentration] |
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| 49. |
Conversion of benzene to iodo benzene |
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Answer» Answer: Mark as brainlist.. Follow me... Iodobenzene can be made from the REACTION of BENZENE with iodine if they are heated under REFLUX in the PRESENCE of concentrated nitric acid, but it is normally made from benzenediazonium chloride solution. |
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| 50. |
Cooking practices which lead to a loss of nutrients are *Taking off thick peels from fruits and vegetablesRepeated washing Rice and PulsesWashing of fruits and vegetables after they have been peeled and cutall of the above |
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Answer» All of the above is the answer |
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