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. |
UNIT HYDROXY COMPOUNDS AND ETHERS 11 notes |
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Answer» ' EXPLANATION: 6 |
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| 2. |
A thoda sa smjliyo, refer attachment aur shi rahio ! |
| Answer» WAH bhai ise kehteh tai Real helper. kal ke thanks ke LIYE dil se welcome so MUCH .sorry for stealing your points. #Save girls .TAKE care,stay safe. Always be happy .Always be happy .I hope you & your loved ones are staying safe & healthy. Always be happy .I hope you & your loved ones are staying safe & healthy. thank you so much for points,so sweet of you. Always be happy .I hope you & your loved ones are staying safe & healthy. thank you so much for points,so sweet of you. if you are satisfied with my ANSWER & you think that my answer is better than the other one so please mark me as brainlyest. | |
| 4. |
Mujhe pta hai I don't know u very well but I know u well |
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| 5. |
2. Define the following terms: (a) Matter (b) Atom (c) molecule (d) Molecular space (e) Molecular force |
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Answer» a) matter, material substance that constitutes the observable universe and, together with energy, FORMS the basis of all objective phenomena. ... The three most familiar forms, or states, of matter are solid, liquid, and gas.b)the smallest PART into which an element can be dividedc) the smallest unit into which a substance can be divided without changing its chemical NATURED)The molecules can move only when there are GAPS or spaces between them, this space is called molecular space.e) molecular forces are the forces which mediate interaction between molecules, including forces of attraction or repulsion which act between atoms and other types of neighboring particles, e.g. atoms or ions. Explanation:please MARK as brainliest!!!!! |
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| 6. |
The unit cell of an element of atomic mass 96u and density 10.3 g cm is a -3 cube with edge length of 314 pm. Find the structure of crystal lattice. (simple cube, fee or bec) (NA = 6.022× 10² mol-¹) |
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Answer» you are very beautifulExplanation:can you PLEASE FRIEND SHIP with me PLEASEI'm ANAND |
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| 7. |
Inert element exist as mono atomic molecule why |
| Answer» INERT ELEMENTS exist as monatomic because molecules of these elements CONTAIN only one atom. | |
| 8. |
Ll .. Good mornings .. ll |
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Answer» rning DUDE :) |
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| 9. |
What are Clouds????????? |
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| 10. |
Muje bhut achaa laga ye dekh kar. |
| Answer» HEY MATE! PLEASE MARK my answer as brainliest... please i am begging u (⁰ - ⁰) | |
| 11. |
Synthesise propane with the help Corey-House reaction ? |
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Answer» The Corey-House synthesis process is the reaction between the organocopper REAGENT, usually a lithium dialkylcuprate as prepared above, and a SECOND alkyl (pseudo)halide or an aryl IODIDE. This results in the formation of a C–C bond between the two ORGANIC fragments: Li+[R–Cu–R]– + R'–X → R–R' + "RCu" + LiX. |
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| 12. |
Define what is matter??? |
| Answer» TION:matter, material substance that CONSTITUTES the observable universe and, together with ENERGY, forms the basis of all OBJECTIVE PHENOMENA. | |
| 13. |
I don't care wo acha hai bura Jo bhi hai mera frnd hai |
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| 14. |
Synthesise propane with the Corey-House reaction ? |
| Answer» TION:The Corey-House synthesis process is the reaction between the organocopper reagent, usually a lithium dialkylcuprate as prepared above, and a second alkyl (PSEUDO)HALIDE or an aryl iodide. This results in the formation of a C–C bond between the two organic fragments: LI+[R–Cu–R]– + R'–X → R–R' + "RCu" + LIX. | |
| 15. |
Why potassium chloride is soluble in water but insoluble in carbon tetrachloride |
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Answer» completely ionic compound . On the other hand , CCL4 which ACTS as a solvent ,is pure covalent compound . We know that ,POLAR solute is dissolved in polar sovent and non polar solute is DISSOLVE in non polar solvent . Since KCL is completely polar and CCl4 is non polar , hence KCl is insoluble in CCl4 . |
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| 16. |
What is sericulture? Which stage of silkmoth yield silk fibres |
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Answer» Sericulture :The production of silk and the rearing of silkworms for this PURPOSE.* After the REELING of silk is DONE, the process of unwinding silk from a cocoon takes place. Silk THREAD is then bleached. The silk fibre is then spun into silk threads. |
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| 17. |
Write the anode reaction, the cathode reaction and the net cell reaction in the following cells which electrode would be positive terminal in each cell? (i) Zn(s) | Zn2+ || Br2|Br- |Pt(s) (ii) Pt(s)|H2(g)|H+ (aq)||Cu2+|Cu(s) |
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Answer» As we know oxidation takes PLACE at anodei) ANODE reaction: Zn --- Zn^+2 + 2eii) Anode reaction H2 --- 2H^+ + 2E hope this will help you |
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| 18. |
Iso electronic species possess A. Same number of proton C. Same number of neutron B. Same number of electron D. Both a and c |
| Answer» ISOELECTRONIC EXPLANATION:MARK me as brIinlist | |
| 19. |
Qurces If a point or a 16cm fly wheel the rim of diameter travels 7000 meters in a min, how radians does the wheel many two seconds through turn in |
| Answer» TION:iameter FL - Gauthmath4.i If a point on the rim of a 16 cm diameter fly wheel travels 7000 meters in a minute , through how many radians does the wheel turn in TWO seconds. n Prnve ... | |
| 20. |
What is selective breeding? Why it is done? For class 7 |
| Answer» TION:SELECTIVE breeding AIMS to adapt an organism's characteristics in a way that is desirable to the HUMANS that BREED them. | |
| 21. |
A carbohydrates containing 40.0./. of C , 6.77./. of H and 53.3./. of O has a molecular mass of 180.2 u . determine its molecular formula. |
| Answer» ANSWER:\sf\tt\large{\green {\underline {\underline{⚘\;Question:}}}} ⚘Question: An element forms an oxide A2O5 .What will be the valency of the element A .What will be the formula of CHLORIDE of the element.\sf\tt\large{\green {\underline {\underline{⚘\;Answers:}}}} ⚘Answers: Valency of element of a chloride of A =5.The formula for chloride of the element will be ACl5.\sf\tt\large{\red {\underline {\underline{⚘\;Solution:}}}} ⚘Solution: \sf\tt\large{\red {\underline {\underline{⚘\;Question 1:}}}} ⚘Question1: An element forms an oxide A2O5.what will be the element of chloride A.\sf\tt\large{\red {\underline {\underline{⚘\;Answer:}}}} ⚘Answer: LET us first define what is valency?It is defined as the combining power of the element SPECIFICALLY as measured by total number of hydrogen atoms it can easily displace or COMBINE with.Consider ,The valency of element A be y,Then,2y+5 (-2)=0Therefore, y=element of A=5.\sf\tt\large{\red {\underline {\underline{⚘\;Question 2:}}}} ⚘Question2: An element forms an oxide A2O5.What will be the formula of chloride of the element .\sf\tt\large{\red {\underline {\underline{⚘\;Answer:}}}} ⚘Answer: We know that,The valency of an atom equals to the number of electrons in the outer shell.If that number may four or less than 4.Since, hereValency of element A is 5 and valency of chlorine is -1Therefore, The formula of chloride of the element is (ACl 5) .\sf\tt\large{\blue {\underline {\underline{⚘\;Hope \;it \;helps \;you \;mate:}}}} ⚘Hopeithelpsyoumate: \sf\tt\large{\blue {\underline {\underline{⚘\;Thank \;you:}}}} ⚘Thankyou: | |
| 23. |
How you will prepare acetaldehyde form acetylene |
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Answer» Explanation:Acetaldehyde is an aldehyde having TWO carbons, one of the carbon as aldehyde group as FUNCTIONAL group and another as methyl group having formula $C{H_3}CHO$ . The acetylene is converted into acetaldehyde by reacting the acetylene with $40\% {H_2}S{O_4}$ at $60^\circ C$ in the PRESENCE of $1\% HGS{O_4}$ . |
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| 24. |
A vessel contains a mixture of H2 and N2 gas. The density of this gas mixture is 0.2 g L-l at 300 K and 1 atm. Assuming that both the gases behave ideally, What is the mole fraction of N2 (g) in the vessel ? (final answer should be rounded off to two decimal places) [Given: R = 0.082 L atm mol-'K', atomic wt. of hydrogen = 1.0 and atomic wt, of nitrogen = 14.0] |
| Answer» TION:A vessel CONTAINS a mixture of H2 and N2 GAS. The density of the gas mixture is 0.2g/L at 300K and 1ATM. Assuming that both the gases behave | |
| 25. |
Nandhitha, speak or say something |
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Answer» pagal ho KYA EXPLANATION:nandhitha pagal hai |
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| 26. |
MY NAME IS SHERYA AND STUDYING IN CLASS 9TH |
| Answer» PLEASE MARK me as BRAINLIST EXPLANATION:OKKKK how are you how do you do | |
| 27. |
Define relative atomic mass |
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Answer» Relative ATOMIC MASS or atomic weight is a DIMENSIONLESS physical quantity defined as the ratio of the AVERAGE mass of atoms of a chemical element in a given sample to the atomic mass constant. The atomic mass constant is defined as being 1/12 of the mass of a carbon-12 ATOM. Explanation:Hope it helps you 。◕‿◕。 |
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| 28. |
What are the physical properties of non metals |
| Answer» PHYSICAL propertiesMetals Non-metalsGood conductors of electricity POOR conductors of electricityGood conductors of heat Poor conductors of heatHigh DENSITY Low densityMalleable and DUCTILE BrittleExplanation:PLEASE mark me as brainliest | |
| 29. |
What's The Answer Pls Help |
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Answer» EFOLLOW ON IG - @kyliebabyHERE IS YOUR ANSWER1- Acids: Substances which turn blue litmus solution RED are called acids. Acids are sour in taste. Bases: Substances which change red litmus solution blue are called bases. They are bitter in taste.2- orange 3- ACID + Base ----> salt + water4- Heterogeneous mixture is always formed from two or more phases of matter. ALSO, they can be easily separated from each other. Hence, air is made up of various gases such as 78.09 Nitrogen, 20.95 oxygen, 0.93 argon,0.04 CARBON dioxide and water vapors. Therefore, the answer is Homogenous mixture.5- (a) separating funnel (B) Sedimentation and decantation (c) Simple distillation |
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| 30. |
Q.10 A pump motor is used to deliver water at a certain rate from a given pipe Town twice as much water from the same pipe in the same time, power of the motor has been Increased to |
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| 31. |
B. Uniform and non-uniform motion. 16. |
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Answer» *UNIFORM Motion * Non-Uniform Motion*ACCELERATION is ZERO * |Acceleration is non-zero*Here distance-time GRAPH * Here distance-time graph shows straight line shows curved line |
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| 32. |
Naoh + hcl - nacl + h2o Identify and define the reactants and products. What does the arrow indicate? |
| Answer» REACTANTS are SODIUM HYDROXIDE, hydrochloric acid , sodium CHLORIDE, WaterExplanation:neutralisation | |
| 33. |
One elemental analysis terminal has the following persentage Compistion of element C=32% H=4% O=64% find out the emprical and molecular formula of this compount(molar mass150) |
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Answer» what do you mean by SHORT row in QUERY WINDOW MARK ME AS A BRAINLIST HAVE A GREAT DAY |
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| 34. |
Fe(OH)3 is less soluble in water than Ca(OH)2. which one is weaker base? |
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Answer» All other Arrhenius ACIDS and bases are weak acids and bases. For example, acetic ACID (HC2H3O2) and OXALIC acid (H2C2O4) are weak acids, while iron hydroxide, Fe(OH)3, and ammonium hydroxide, NH4OH (which is actually just AMMONIA, NH3, dissolved in water), are examples of weak bases. |
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| 35. |
मैंने स्कूल टाइम में काफी लडकियों के साथ दोस्ती की है और उन्हें फ़ोर्स किया की वो मुझे I love U बोले. बहुतो ने बोल भी दिया लेकिन इससे क्या गया ? मेरा मन इन सबसे परे था और जब लड़की हाँ कर देती तब में उन्हें टाइम देना बंद कर देता था. |
| Answer» TION:y KAISA SAWL he | |
| 36. |
Write 20 chemical equation and balance them |
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Answer» 2Fe2O3+3C--->4Fe+3CO22)H2SO4+CaCO3--->CaSO4+H2CO33) 2H2+02--->2H204) CH3COOH+C2H5OH ---> CH3COOC2H5+H2O5) 1 AgNO3 + 1 LiOH --> 1 AgOH + 1 LiNO36) CH4+2O2--->CO2+2H2O.7) SN+2H2SO4-->SnSO4+2H2O+SO28) CuO+H2SO4--->CuSO4+H29) Mg3N2 + 3H2O ---> 3MgO + 2NH310) N2 + O2 ---> 2 NO11) 2 CH4 + 3 O2 ---> 2 CO + 4 H2O12) 6 CO2 + 6 H2O ---> C6H12O6 + 6 O213) 2 AgI + Na2S ---> Ag2S + 2 NaI14) Ba3N2 + 6 H2O --->3 Ba(OH)2 + 2 NH315) 4 FeS + 7 O2 --->2 Fe2O3 + 4 SO216) PCL5 + 4 H2O ---> H3PO4 + 5 HCl17) 3 CaCl2 + 2 Na3PO4--->Ca3(PO4)2 + 6 NaCl18) 2 As + 6 NaOH --->2 Na3AsO3 + 3 H219) 12 HClO4 + P4O10 ---> 4 H3PO4 + 6 Cl2O720) 10 KClO3 + 3 P4 ---> 3 P4O10 + 10 KCl21) SNO2 + 2 H2 ---> Sn + 2 H2O22) 3 KOH + H3PO4 ---> K3PO4 + 3 H2O23) 3 Hg(OH)2 + 2 H3PO4 ---> Hg3(PO4)2 + 6 H2O24) 2 KNO3 + H2CO3 ---> K2CO3 + 2 HNO325) Na3PO4 + 3 HCl ---> 3 NaCl + H3PO426) TiCl4 + 2 H2O ---> TiO2 + 4 HCl27) C2H6O + 3 O2 ---> 2 CO2 + 3 H2O28 4 NH3 + 5 O2 ---> 4 NO + 6 H2O29) B2Br6 + 6 HNO3 ---> 2 B(NO3)3 + 6 HBr30) 8 CO + 17 H2 ---> C8H18 + 8 H2O31) 4 NH4OH + KAl(SO4)212H2O ---> Al(OH)3 + 2 (NH4)2SO4 + KOH + 12 H2O32) 2 Fe + 6 HC2H3O2 ---> 2 Fe(C2H3O2)3 + 3 H233) N2+3H2--->2NH334) N2 + 3H2 ---> 2NH335) Al2O3+3H2SO4--->Al2(SO4)3 +3H2O36) HCl+NH3--->NH4Cl37) 2Na + 2H2O = 2NaOH + H238) C6H12O6--->6C+6H2O39) CuO+H2SO4--->CuSO4+H240) COH12O6--->2CO2+2C2H5OH41) FeCl3+Fe2O3--->3FeOCl42) NaCl+AgNO3--->NaNO3+AgCl43) HCl+NH3--->NH4Cl44) 2Al+6HCl--->2AlCl3+3H245) Ca + 2HCl = CaCl2 + H246) CaCO3 + H2SO4 = CaSO4 + H20 + CO247) 3H2SO4 + 2Fe ---> Fe2(SO4)3 + 3H248) Mg3N2 + 3H2O ---> 3MgO + 2NH349) CH4+ O2 ---> CO2 + H2O50) Cl2 + SO2 + H2O ---> HCl + H2SO4If I have repeated any equation, please do tell me.mark as brainlist ❤❤❤ |
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| 37. |
Find the work done from the following graph. 92 = 600 Joule 500 K P(N/m2) 350 K 9, V> |
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Answer» n=3 moles, T=27 o C=300KP 1 =10ATM P 2 =1atmWork DONE in isothermal REVERSIBLE process,W=−2.303nRTlog(P 1 /P 2 ) =−2.303×3×8.314×300log( 110 ) =5744.14JWork done against constant pressure of 1atm=P opp (V f −V i )=−1atm( P 2 NRT − P 1 nRT )=−1×3×8.314×300( 11 − 101 )=6734.34J . |
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| 38. |
Draw the structure of Sucrose. Explain what is inversion of sugar and invert Sugar (for 3 marks) |
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| 39. |
The maximum valency oxygen can attain? |
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Answer» 4Explanation:becous O8=(2,6) and 4 is MAXIMUM VALENCY of OXYGEN |
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| 40. |
Write the IUPAC name of the following. (CH3)2 C = CH – CH2 – CH2 – Cl |
| Answer» IUPAC name of given compound is I-Chloro-3-methylbutane. The parent chain has 4 CARBON atoms with a chlorine atom as the substituent at C-1 & methyl group as the substituent at C-3 (chlorine is given preference over methyl). | |
| 41. |
3 A student carefully observed the properties of colloid of egg albumin in water and listed them as below that it was: D translucent il) stable 111) homogeneous IV) filterable The property which is not correct is: a) (m) b) (i). (IN) c) (i), (IV) d) (D). (IV) |
| Answer» TION:HEY MORNING ☺️✌ J ó i N VSO-CTNA-MBM | |
| 42. |
Name the major product formed when 2 – Chlorobutane is heated with alcoholic alkali. |
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Answer» o BUTANE on REACTION with alcohol KOH GIVES 2-butene as the major product.Hope it helped |
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| 43. |
from the rate expression for the following reaction determine their order of reaction and the dimensic of the rate constant |
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Answer» (i) 3NO(g)→N 2 O(g)Rate=k[NO] 2 Order w.r.t NO is 2 and OVERALL order is 2.Dimensions of the rate constantsmolL −1 =k(molL −1 ) 2 k=mol −1 L 1 s −1 (ii) H 2 O 2 (aq)+3I − (aq)+2H + →2H2O(I)+I 3− Rate=k[H 2 O 2 ][I − ]Order w.r.t H 2 O 2 is 1, order w.r.t I − is 1 and overall order is 2.Dimensions of the rate constantsmolL −1 =k(molL −1 ) 2 k=mol −1 L 1 s −1 (iii) CH 3 CHO(g)→CH 4 (g)+CO(g)Rate=k[CH 3 CHO] 3/2 Order w.r.t CH 3 CHO is 3/2 and overall order is 3/2.Dimensions of the rate constantsmolL −1 =k(molL −1 ) 3/2 k=mol −1/2 L 1/2 s −1 (iv) C 2 H 5 Cl(g)→C 2 H 4 (g)+HCL(g)Rate=k[C 2 H 5 Cl]Order w.r.t C 2 H 5 Cl is 1, and overall order is 1.Dimensions of the rate constantsmolL −1 =k(molL −1 ) 1 k=s −1 |
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| 44. |
Example of combination of an element and a compound 50 points |
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Answer» maine toh thanks wala DIL MAANGA hai tum logo se :) MARKS me as brilliantmujhse koi turu LUB NI kartacan i get a followplease |
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| 45. |
Carbon, with a half-full outer shell of electrons-four in a shell that can hold eight-readily shares its electrons with other atoms and forms a vast number of molecules, many of which are the organic molecules that form the bulk of living matter. Looking at the periodic table, what other element do you think might play a role like carbon in life forms on some other planet? |
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Answer» don't KNOW PLEASE MARK me please mark me please mark me ༶•┈┈⛧┈♛ |
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| 46. |
PH of samples of HCI and acetic are 2 and 3.5 respectively. which one is a stronger acid? |
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Answer» Between ACETIC acid and hydrochloric acid, the hydrochloric acid is more ACIDIC. Acid which ionise completely in water are CALLED strong acid. Here Hydrochloric acid DISSOCIATES completely while acetic acid dissociates PARTIALLY. |
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| 50. |
The robinson annulation consists of hi |
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Answer» The Robinson annulation is a chemical reaction used in organic chemistry for ring formation. It was discovered by Robert Robinson in 1935 as a method to create a six membered ring by FORMING three new carbon–carbon bonds.Explanation:HOPE my ANSWER is correct, If yes PLS mark me as BRAINLIEST |
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