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.
| 2. |
Use of bleaching power ? |
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Answer» ALEXA and siri .The only women who LISTEN to men! just kidding。◕‿◕。 |
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| 3. |
U to1705 orarios. Frtunodefumorfos u popiedsu poprad Futros |
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Answer» y7ftuf7tf7ftfff7ftf6t6futfutuf6fyf |
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| 4. |
(a) When is wheat grown in India? Name two states important for the growth of thiscrop.12 |
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Answer» Answer: There are two important wheat-growing ZONES in the country – the Ganga-Satluj plains in the NORTH- WEST and black soil region of the Deccan. The major wheat-producing states are Punjab, HARYANA, Uttar Pradesh, Bihar, Rajasthan and parts of Madhya Pradesh. |
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| 5. |
Write the rule for making chemical formulas of compounds |
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| 6. |
A di-negative ion of an element has 10 electrons in it identify the element. |
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Answer» the ELEMENT name is NEON because it's has TOTAL 10 ELECTRON in it |
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| 7. |
Write the solubility product of sparingly soluble salt Bi2S3 |
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Answer» The SOLUBILITY PRODUCT KSP for Bi2S3 is 1.2 × 10^-98 . |
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| 8. |
Define the following terms(1) Mineral (2) Ore |
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Answer» {Question} Define the following terms
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| 10. |
होमोलोगाउज सीरीज डेफिनेशन क्लास 10 |
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Answer» Explanation: In chemistry, a homologous series is a series of CHEMICAL compounds with the same general formula.[1] Usually these compounds vary by a single parameter such as the LENGTH of a carbon chain.[2] Examples of such series are the straight-chained alkanes (paraffins), and some of their DERIVATIVES (such as the primary alcohols, aldehydes, and (mono)carboxylic acids). Methane Ethane Compounds within a homologous series typically have a fixed set of functional groups that gives them similar chemical and physical properties. For example, the series of primary straight-chained alcohols has an hydroxyl at the end of the carbon chain. These properties typically CHANGE GRADUALLY along the series, and the changes can often be explained by small differences in molecular size and mass. |
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| 11. |
The process SO2-----S2Cl2 is |
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Answer» ANSWER: Reduction Explanation: Oxidation reaction : It is DEFINED as the reaction in which a substance looses its electrons. |
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| 12. |
CH 3 c h 3 CH 3 -CH-CH , – -CH 2 -CH 2 -CH 3 CH -CH 3 T си, |
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Answer» what you want to say? I can't UNDERSTAND |
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| 13. |
10 The vapour pressure of a pure liquid is 0.043 barat certain temperature. When a non-volatile solutesdissolved into it, the vapour pressure of the solution isfound to be 0.041 bar. What is the relative loweringvapour pressure . |
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Answer» Answer: GIVEN- P1⁰= 0.043 P1 = 0.041 To FIND- RELATIVE Lowering of vapour pressure Formula- ∆P/ P1⁰= P1⁰- P1 / P1⁰ Solution- ∆P/P1=P1⁰-P1 / P1⁰= 0.043-0.041/0.043 = 0.0465 |
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| 14. |
सिलवर का रंग कैसा होता है |
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Answer» Answer: ye KESA question he? silver COLOUR to silver hi HOTA he... mark as BRILLIANT me... |
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| 16. |
वाष्प घनत्व द्वारा अणुभार को कैसे ज्ञात किया जा सकता है |
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Answer» जल (H2O) पृथ्वी की सतह पर सर्वाधिक मात्रा में पाया जाने वाला अणु है, जो इस ग्रह की सतह के 70% का गठन करता है। प्रकृति में यह तरल, ठोस और गैसीय अवस्था में मौजूद है। मानक दबावों और तापमान पर यह तरल और गैस अवस्थाओं के बीच गतिशील संतुलन में रहता है। घरेलू तापमान पर, यह तरल रूप में हल्की नीली छटा वाला बेरंग, बेस्वाद और बिना गंध का होता है। कई पदार्थ, जल में घुल जाते हैं और इसे सामान्यतः सार्वभौमिक विलायक के रूप में सन्दर्भित किया जाता है। इस वजह से, प्रकृति में मौजूद जल और प्रयोग में आने वाला जल शायद ही कभी शुद्ध होता है और उसके कुछ गुण, शुद्ध पदार्थ से थोड़ा भिन्न हो सकते हैं। हालांकि, ऐसे कई यौगिक हैं जो कि अनिवार्य रूप से, अगर पूरी तरह नहीं, जल में अघुलनशील है। जल ही ऐसी एकमात्र चीज़ है जो पदार्थ की सामान्य तीन अवस्थाओं में स्वाभाविक रूप से पाया जाता है - अन्य चीज़ों के लिए रासायनिक गुण देखें. पृथ्वी पर जीवन के लिए जल आवश्यक है।[3] जल आम तौर पर, मानव शरीर के 55% से लेकर 78% तक का निर्माण करता है।[4] |
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| 17. |
Limitation of octel rule |
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Answer» Answer: plz mark me BRAINLIEST Explanation: The octet RULE is not satisfied for all atoms in molecules with an odd number of electrons such as nitric oxide, NO and NITROGEN dioxide, NO2. The rule of the octet is EVIDENTLY BASED on the chemical inertness of the noble gases. |
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| 18. |
Carbons 4,22. What is the hybridization of the carbon atoms numbered 1 and 2 respectively in the followingstructure?CH=CH-CECH1 2sp.SP(d) sp’, sp(a) sp.sp?(b) sp?sp?(e) sp, sp2 |
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Answer» sp^2 sp Explanation: HOPE it HELPS you...MARK as BRAINLIEST |
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| 19. |
प्र.8 2.0 ग्राम हाइड्रोजन का N.T.P. आयतन होता है-(a) 224 लीटर (b) 22.4 लीटर (c) 2.24 लीटर (d)112 लीटर Please help out |
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Answer» aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa |
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| 20. |
.2Give the IUPAC names of the following compounds:(i) CH3CH(CI)CH(Br)CH3(ii) CHF2CBrCIF (iii) CICH2C=^-CCH2Br |
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| 21. |
The half life of first order reaction is 4 year what is it shelf life |
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Answer» Half life of a FIRST order reaction is 4 s and the initial concentration of the reactant is 0.12 M. The concentration of the reactant left after 16 s is: (a) 0.0075 M (b) 0.06 M (c) 0.03 M (d) 0.015 M The rate CONSTANT of a first order reaction is. Explanation: hope it helps you...MARK me as brainliest |
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| 22. |
Meaning of meaning ???? xd |
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Answer» Answer: the words we can understand in SIMPLE sentences Explanation: MARK as brainliest please |
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| 23. |
Arrange the following element in increasing order of their metallic characterLi, K, Na |
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| 24. |
What is dimag ????__________ |
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| 25. |
How many grams of water are required to add to 200 g of 98% sulfuric acidsolution for obtaining a solution with a mass fraction of acid 20%. |
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Answer» Answer: |
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| 26. |
If the density of methanol is 793kgL-1.what is the volume needed for making 2.5L of its 0.25M solutions? |
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Answer» xigohxgkxhkfxkhfhkxfxfhkxfjkfxkhhkfxxhfk Explanation: SORRY sorry sorry sorry |
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| 27. |
About evaporation according to chemistry answer shld be related chemistry |
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Answer» Explanation: Vaporization is the process in which a LIQUID is converted to a gas. Evaporation is the conversion of a liquid to its vapor below the boiling temperature of the liquid. ... As a result, the liquid MOLECULES that remain now have lower kinetic energy. As evaporation occurs, the temperature of the remaining liquid decreases hey deeksha nenu teju akkani idhi na new ID |
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| 29. |
balamce the following redox reaction by oxidation number method in acidic medium. Cr2O72- + S o32- ---> Cr3+ + SO42- |
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Answer» Explanation: Step 1. Write down the unbalanced equation ('skeleton equation') of the chemical reaction. All reactants and products MUST be known. For a better result write the reaction in ionic form. SO32- + Cr2O72- → Cr3+ + SO42- Step 2. Separate the process into half reactions. A redox reaction is nothing but both oxidation and reduction reactions taking place simultaneously. a) Assign oxidation numbers for each atom in the equation. Oxidation number (also called oxidation state) is a measure of the degree of oxidation of an atom in a substance (see: Rules for assigning oxidation numbers). S+4O-232- + Cr+62O-272- → Cr+33+ + S+6O-242- b) Identify and write out all redox couples in reaction. Identify which reactants are being oxidized (the oxidation number increases when it reacts) and which are being reduced (the oxidation number goes down). Write down the TRANSFER of electrons. Carefully, insert coefficients, if necessary, to make the numbers of oxidized and reduced atoms equal on the two sides of each redox couples. O:S+4O-232- → S+6O-242- + 2e-(S) R:Cr+62O-272- + 6e- → 2Cr+33+(Cr) c) Combine these redox couples into two half-reactions: one for the oxidation, and one for the reduction (see: Divide the redox reaction into two half-reactions). O:S+4O-232- → S+6O-242- + 2e- R:Cr+62O-272- + 6e- → 2Cr+33+ Step 3. Balance the atoms in each half reaction. A chemical equation must have the same number of atoms of each element on both sides of the equation. Add appropriate coefficients (stoichiometric coefficients) in front of the chemical formulas to balance the number of atoms. Never change any formulas. a) Balance all other atoms except hydrogen and oxygen. We can use any of the species that appear in the skeleton equations for this purpose. Keep in MIND that reactants should be added only to the left side of the equation and products to the right. O:S+4O-232- → S+6O-242- + 2e- R:Cr+62O-272- + 6e- → 2Cr+33+ b) Balance the charge. For reactions in an acidic solution, balance the charge so that both sides have the same total charge by adding a H+ ion to the side deficient in positive charge. O:S+4O-232- → S+6O-242- + 2e- + 2H+ R:Cr+62O-272- + 6e- + 14H+ → 2Cr+33+ c) Balance the oxygen atoms. Check if there are the same numbers of oxygen atoms on the left and right side, if they aren't equilibrate these atoms by adding water molecules. O:S+4O-232- + H2O → S+6O-242- + 2e- + 2H+ R:Cr+62O-272- + 6e- + 14H+ → 2Cr+33+ + 7H2O BALANCED half-reactions are well tabulated in handbooks and on the web in a 'Tables of standard electrode potentials'. These tables, by convention, contain the half-cell potentials for reduction. To make the oxidation reaction, simply reverse the reduction reaction and change the sign on the E1/2 value. Step 4. Make electron gain equivalent to electron LOST. The electrons lost in the oxidation half-reaction must be equal the electrons gained in the reduction half-reaction. To make the two equal, multiply the coefficients of all species by integers producing the lowest common multiple between the half-reactions. O:S+4O-232- + H2O → S+6O-242- + 2e- + 2H+| *3 R:Cr+62O-272- + 6e- + 14H+ → 2Cr+33+ + 7H2O| *1 O:3S+4O-232- + 3H2O → 3S+6O-242- + 6e- + 6H+ R:Cr+62O-272- + 6e- + 14H+ → 2Cr+33+ + 7H2O Step 5. Add the half-reactions together. The two half-reactions can be combined just like two algebraic equations, with the arrow serving as the equals sign. Recombine the two half-reactions by adding all the reactants together on one side and all of the products together on the other side. 3S+4O-232- + Cr+62O-272- + 3H2O + 6e- + 14H+ → 3S+6O-242- + 2Cr+33+ + 6e- + 7H2O + 6H+ Step 6. Simplify the equation. The same species on opposite sides of the arrow can be canceled. Write the equation so that the coefficients are the smallest set of integers possible. 3S+4O-232- + Cr+62O-272- + 8H+ → 3S+6O-242- + 2Cr+33+ + 4H2O Finally, always check to see that the equation is balanced. First, verify that the equation contains the same type and number of atoms on both sides of the equation. ELEMENT LEFT RIGHT DIFFERENCE S 3*1 3*1 0 O 3*3 + 1*7 3*4 + 4*1 0 Cr 1*2 2*1 0 H 8*1 4*2 0 Second, verify that the sum of the charges on one side of the equation is equal to the sum of the charges on the other side. It doesn't matter what the charge is as long as it is the same on both sides. 3*-2 + 1*-2 + 8*1 = 3*-2 + 2*3 + 4*0 0 = 0 Since the sum of individual atoms on the left side of the equation matches the sum of the same atoms on the right side, and since the charges on both sides are equal we can write a balanced equation. 3SO32- + Cr2O72- + 8H+ → 2Cr3+ + 3SO42- + 4H2O |
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| 30. |
Methyl alcohol to ethylamine |
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Answer» Answer: METHYL amine can be CONVERTED to ETHYL amine by first treating it with nitric acid and thereafter reducing it by NA in the presence of alcohol. Explanation At a temperature of 0 to 5 degree celsius,ethyl amine reacts with a Nitrous acid(obtained from NaNO2solution and dilute HCl),to give ethyl diazonium CHLORIDE. This can be given a little heat in a aqueous medium to give ethanol.
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| 33. |
Reduction by Na_Hg/H2O CH3_CO_CH2_CH3 + 2 [H] |
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Answer» Answer: A CHINESE company MAKES these goods in BANGLADESH. (CHANGE the VOICE) Explanation: A Chinese company makes these goods in Bangladesh. (Change the Voice) |
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| 34. |
Calculate the number of unit cells in 0.3 g of a species having density of 8.5 g/cm3and unit cell edge length 3 |
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Answer» 0.3x8.5x3cm Explanation: answer is 97.96 |
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| 35. |
1878.6 xloo0/5o XO.2 x 1000kj find |
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| 36. |
Please answer as soon as possible will mark as brainliest |
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| 37. |
How can you get the metal oxide back to use again when the reaction has finished? |
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| 38. |
Explain with examples the double displacement reaction |
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Answer» Answer: Double displacement reactions TAKE place mostly in aqueous SOLUTIONS wherein the IONS precipitate and exchange of ions takes place. For example, when a solution of barium chloride is MIXED with SODIUM sulphate, a white precipitate of barium sulphate is formed rapidly. These reactions are ionic in nature. |
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| 39. |
Describe how ionic bonds in sodium chloride are formed |
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Answer» Answer: Ionic bonding in sodium chloride. An atom of sodium (Na) DONATES one of its electrons to an atom of chlorine (CL) in a chemical reaction, and the resulting positive ion (Na+) and negative ion (Cl−) FORM a stable ionic COMPOUND (sodium chloride; common table salt) based on this ionic bond. |
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| 40. |
What is the monohybrid cross |
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Answer» Explanation: A monohybrid cross is a cross between two organisms with DIFFERENT VARIATIONS at one genetic locus of interest. The CHARACTER being studied in a monohybrid cross are governed by two or MULTIPLE variations for a single locus. |
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| 41. |
Thumb on its mouth.OBSERVATIONS&Volume of water samples taken in test tube =Volume of soap solution added to each test tube =mLmLS.No.Water sampleInitial length (withoutshaking) in cm.Final length (aftershaking) (in cm)Length of thefoam produced (cm)3.A. Distilled waterB. Underground waterC. Water containingCa(HCO3)2D. Water containingCaCl₂E Water containingCaSO45. |
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Answer» dghdifiototutgegegfefefefrf |
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| 43. |
गिव एग्जांपल ऑफ एल्युमीनियम इज यूज टू मेक |
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Answer» cans,foils,kitchen utensils,window frames,aeroplaneparts etc. |
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| 44. |
Homograph meaning tell me Armies |
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Answer» each of two or more words spelled the same but not NECESSARILY PRONOUNCED the same and having DIFFERENT meanings and ORIGINS. |
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| 45. |
What is short name Sodium?? |
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Answer» Answer: Sodium is a chemical ELEMENT with the symbol NA (from Latin "natrium") and ATOMIC number 11. Hope It HELP you |
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| 46. |
Write the symbol of mercury and sulphur as proposed by dalton |
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Answer» MERCURY sulfide, mercuric sulfide, mercury sulfide, or mercury (II) sulfide is a chemical compound composed of the chemical elements mercury and sulfur. It is REPRESENTED by the chemical formula HGS. It is VIRTUALLY insoluble in water. Explanation: |
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| 47. |
2HzS = 2H2(g) + S2(g)પ્રક્રિયામાં 1 મોલ HટS, 0,2 મોલ Hટ અને 0.8 મોલ S2.2 લીટરના પાત્રમાં હાજર છે તો સંતુલન અચળાંકકેટલો થાય.(1) 0.08(3) 0.004(2) 0.016(4) 0.160 |
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Answer» I cannot UNDERSTAND your QUESTION |
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| 48. |
Co2is a heavy gas or lighter gas?? |
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| 49. |
u all r wasteage because u r not answering to my question. if 8 am give the question u all r giving me the wasteage answer to me. |
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| 50. |
Question - 1ona) state one observation for the effects of heateach of the followen1) Zinc nitrate2 Ammonium chloride3) Hydrated copper sulphate) 4 Ammonium dichromate5 copper carbonate |
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Answer» dtuspyrkrystildd8dizkutdoudpt7ept7 |
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