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 happens when sulphuretted hydrogen dissolved in water |
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Answer» Hydrogen has a very low solubility in WATER, BASED on its HENRY’s constant. So it does DISSOLVE, but the amount is very low when compared to nitrogen, oxygen or other GASES. |
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| 2. |
Which element in the 2nd period experiences catenetion or has the property of catenetion? |
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Answer» # CARBON has the PROPERTY of CATENETION . |
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| 3. |
Maximum Co-valency of phosphorus can be (1)4 (2)5 (3)6 (4)3 |
| Answer» CO VALENCY of PHOSPHORUS can be 2(5) | |
| 4. |
Please give me some more examples of combination reaction for class 7 |
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Answer» A combination reaction (ALSO known as a SYNTHESIS reaction) is a reaction where two or more elements or compounds (reactants) combine to FORM a single compound (product). Such reactions may be REPRESENTED by equations of the following form: X + Y → XY. |
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| 5. |
Conversion of formic acid to methyl acetate |
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Answer» Carboxylic ACIDS and esters can be reduced to primary alcohols by reacting them with lithium aluminium HYDRIDE, LiAlH4. Formic acid (HCOOH) can be converted to methanol (CH3OH) by the same method. |
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| 6. |
Nucleic acid are called acids mainly because of the presence of- |
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Answer» The nucleic acids, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), are the molecules RESPONSIBLE for carrying the GENETIC information of a cell. In the same WAY that proteins are polymers of amino acids, nucleic acids are long chain “polymers” of NUCLEOTIDE building blocks |
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| 7. |
According to a study, how much of uranium is stored in tummalapalli mine in andhra pradesh? |
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Answer» According to study, 1.04 LAKH tones of uranium is stored in TUMMALAPALLI MINE in andhra pradesh. |
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| 8. |
Write Chemical Formula of Chlorodifluoromethane and it's uses |
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Answer» CHClF2 is the CHEMICAL FORMULA of CHLORODIFLUOROMETHANE |
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| 9. |
Write the steps for extraction of metal of middle reactivity series |
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Answer» THE STEPS ARE: |
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| 10. |
Example for decomposition reaction from our daily life |
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Answer» Those REACTIONS in which a COMPOUND split up into TWO or more simpler substances are known as DECOMPOSITION reaction.. |
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| 11. |
Example for combination reaction from our daily life |
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Answer» 1) Oxygen combines with carbon monoxide and forms Carbon Dioxide. 2) magnesium oxide combining with carbon dioxide to produce magnesium CARBONATE. 3) IRON combining with sulphur to produce iron(II) sulfide. |
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| 12. |
Refining of impure copper and zinc impurity is to be done by electrolysis using anode and cathode respectively as |
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Answer» Refining of IMPURE Copper and Zinc impurity is to be DONE by electrolytic refining using anode and CATHODE respectively as a electrode. |
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| 13. |
Give me an example of desirable change |
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Answer» RIPPING of FOODS, germination of seeds are the example of DESIRABLE change .. HOPE it's help you... : )) |
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| 14. |
Write the name and structure of an alcohol with three carbon atoms in its molecule |
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Answer» The ALCOHOL with three carbons is |
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| 15. |
What is e/m ratio?what was the value of this ratio for a particle in the cathode rays? |
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Answer» Em RATIO is firstly describe by JJ Thomson it is the ratio of charge of electron and MASS of electron you can see in NCERT chaptre 1 valie of that |
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| 16. |
Give six feature of acid |
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Answer» Properties of acids |
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| 17. |
Give me an example of desirable change. |
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Answer» DESIRABLE CHANGE MEANS the change in our favour. example-Rain on TIME |
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| 18. |
when in the solution of copper sulphate zinc granules are Deep and in the solution of zinc sulphate pieces are deep which reaction is takes place from the above which compound is formed which colour and why |
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Answer» Heyaa☺ |
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| 19. |
Determine the components of reaction atd. Take that p1 = 8 kn and p2 = 16 kn |
| Answer» BHAI aap QUESTION to CORRECT LIKHE ho na.. | |
| 20. |
Difference in electronic spin in ortho and para hydrogen |
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Answer» Ordinary dihydrogen is an equilibrium mixture of ortho and para hydrogen. The amount of ortho and para hydrogen varies with temperature as: At 0°K, hydrogen contains mainly para hydrogen which is more stable. At the temperature of liquefaction of air, the ratio of ortho and para hydrogen is 1 : 1. At the ROOM temperature, the ratio of ortho to para hydrogen is 3 : 1. Even at very high TEMPERATURES, the ratio of ortho to para hydrogen can never be more than 3 : 1. Thus, it has been possible to get pure para hydrogen by cooling ordinary hydrogen gas to a very low temperature (close to 20 K) but it is never possible to get a sample of hydrogen containing more than 75% of ortho hydrogen Hydrogen atoms consist of a proton and an electron. The proton has a charge of +1 and a spin. The spin can either be CLOCKWISE or counter-clockwise. So when you have a hydrogen molecule you have two possibilities: the two spins can both be aligned (both clockwise or both counter-clockwise) or they can be opposed Ortho hydrogen:— The hydrogen molecule in which both the PROTONS in the nuclei of both hydrogen atoms spin in the same direction is called as ortho hydrogen. In this form the resultant nuclear spin is one. Para hydrogen:—- Hydrogen molecule in which both the protons in the nuclei of both hydrogen atoms spin in opposite direction is called para hydrogen. In this form resultant nuclear spin is zero. |
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| 21. |
Explain difference neutralization curve |
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Answer» NEUTRALIZATION is a RXN which is the acid+base -> WATER +SALT |
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| 22. |
A 0.2 M Solutions of formic acid is 3.2% ionsed so what is its ionisation constant |
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Answer» K aplha={C (alpha) ^2}/1-alpha. Here C=0.2M.aplha=3.2%.HCOOH=H++COOH- |
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| 23. |
Plzzz answer this.. ..with explanation. and do not spam.. |
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Answer» In DISTILLED water the COLOR of the litmus PAPER will not change. |
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| 24. |
What are monovalent metals |
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Answer» Metals having valency of 1 are known as MONOVALENT metals.. EG:- NA,Li etc... |
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| 25. |
Distinguish between reversible and irreversible changes with examples |
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Answer» Reversible changes. |
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| 27. |
Why does copper not react with steam |
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Answer» It is so because when we CONSIDER reactivity series COPPER COMES below the HYDROGEN.so it is unable to DISPLACE hydrogen from water. |
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| 28. |
Difference between intermolecular and intramolecular reaction |
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Answer» Some reactions, two pathways present themselves: ONE VIA anintramolecular reaction (reacting GROUPS both within the same molecule), one via an intermolecular reaction (reacting groups in DIFFERENT molecules). Generally intramolecular reactions are entropically favoured. |
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| 29. |
When zn react with hcl it is change in temperatures |
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Answer» When zinc REACTS with HYDROCHLORIC acid it PRODUCES hydrogen GAS so yes there is a change in temperature |
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| 30. |
What material is used for carbon compounds????It's urgent |
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Answer» A few varieties of COAL are almost pure carbon. Natural GAS, coal and oil have carbon in them. Natural gas and oil are all hydrocarbons that are compounds MADE from hydrogen and carbon. |
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| 31. |
3. Relative to metals, how does the specific heat of water compare: higher, or lower? |
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Answer» Solid > Liquid > Gas. |
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| 32. |
Plz give me the answer. with explanation.. .. |
| Answer» ANSWER is HYDROCHLORIC acid . it used because it is a strong acid and have the CAPACITY to KILL bacteria and clear the deposits . | |
| 33. |
Give the atomicity of Cu2O, H2So4, Al2(So4)3,Mgcl2 |
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Answer» HEYY here is ur ans.... No. of ATOMS contained in a molecule is known as atomicity. so the atomicity for the FOLLOWING are. 1. 4 2. 7 3. 11 4. 5 hope it helps u....THANKS...!!! |
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| 34. |
Give two criteria of a good reducing agent for extraction of metals.Please help me.. |
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Answer» TWO good reducing agents are as FOLLOWS:-
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| 35. |
2k 8l 18m 10n find ots atomic number |
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Answer» If the GIVEN electronic configuration has no charge, then its atomic number will be the SUM of electrons in each shell. |
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| 37. |
List the essentual features of valence electron pair theory |
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Answer» VALENCE PLEASE MARK as a BRAINLIST ANSWER |
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| 38. |
Calculate the volume of co2 produced by the combustion of 40 ml acetone vapours in presence of excess oxygen |
| Answer» PRESENT CARBON DIOXIDE | |
| 39. |
How common ion effect affects solubility of a highly soluble substance? |
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Answer» The lead(II) chloride becomes even less soluble, and the concentration of lead(II) ions in the solution decreases. This type of RESPONSE occurs with any SPARINGLY soluble SUBSTANCE: it is lesssoluble in a solution which contains any ion which it has in common. This is the common ion effect |
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| 40. |
Differentiate between an acid and abase using the three principles |
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Answer» ACID is SOUR in TASTE but BASE is bitter in taste PLEASE mark as a brainlist answer |
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| 41. |
Can anyone explain hybridization in an easy way??? |
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Answer» The process of "intermixing of atomic ORBITALS of nearly same energies to form a new set of orbitals having equivalent energies" is called hybridization. And orbitals which are formed in hybridization process are called hybrid orbitals. |
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| 43. |
How an the r3duction potentials of the electrode be increased? |
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Answer» The reduction potential of anelectrode can be increased either by increasing the CONCENTRATION of METAL cation [MN+(aq)] or TEMPERATURE T. |
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| 44. |
Why does PH3 in moist air? |
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Answer» Phosphine GAS Detectors (PH3 Detectors) Phosphine (PH3), a HIGHLY toxic, flammable gas, is used in the SEMICONDUCTOR industry, in chemical PROCESSING, and more commonly in fumigation of grain, food products, and tobacco, prior to international transport. |
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| 45. |
2 + 3 X 2 is equal to 2 NH3 what is the delta H |
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Answer» If U understabd thanmark as BRAINLIEST |
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| 46. |
Give symbols, iupac names to elements with atomic number 111 and 121 |
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Answer» ATOMIC NUMBER NameSymbol 101 UnniluniumUnu102UnnilbiumUnb103UnniltriumUnt104UnnilquadiumUnq105UnnilpentiumUnp106UnnilhexiumUnh107UnnilseptiumUns108UnniloctiumUno109UnnilenniumUne110UnunniliumUun111UnununiumUuu112UnunbiumUub113UnuntriumUut114UnunquadiumUuq115UnunpentiumUup116UnunhexiumUuh117UnunseptiumUus118UnunoctiumUuo119UnunenniumUue120UnbiniliumUbn121UnbiuniumUbu |
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| 47. |
Is there any procedure to prove that oxygen is needed for burning ?i want full procedureplease please |
| Answer» FIRE is a CHEMICAL reaction than create LIGHT and HEAT from oxygen and FUEL | |
| 48. |
Fin the number of particles for 46grams of Na atom |
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Answer» Moles of sodium is equal to 46 DIVIDED by mass NUMBER of sodium that is 2 |
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| 49. |
Generate h********* series of alkane upto 4 carbon carbon atoms |
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Answer» Simply to GENERATE the series of ALKANE |
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