Saved Bookmarks
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. |
Can you give me the list of valency and valence electrons. only upto 20 |
|
Answer» hope this helps youExplanation:Hydrogen (H) VALENCY : +- 1 , Valence ELECTRONS : 1.Helium (He) Valency : 0 , Valence electrons : 2.Lithium (Li) Valency : +1 , Valence electrons : 1.Beryllium (Be) Valency : +2 , Valence electrons : 2.Boron (B) Valency : +3 , Valence electrons : 3.Carbon (C) ...Nitrogen (N) ...OXYGEN (O) |
|
| 2. |
How many moles are there in 92 point gram nitrogen |
|
Answer» 1 MOLE EQUAL to 6.022×10²³ that is constant to every atom.so , 90 g = 90×6.022×10²³ i.e, 541.98 ×10²³Explanation:Hope this answer will help u and PLEASE follow me and mark as a brainliest answer |
|
| 3. |
1708 Denatured alcohol, is also called. |
|
Answer» js kaur to the produce the number of this EMAIL and any attachments is intended only for the NEW YEAR and |
|
| 4. |
What is the uses of tellurium |
|
Answer» Tellurium has been used to vulcanise rubber, to tint glass and ceramics, in SOLAR CELLS, in rewritable CDs and DVDs and as a catalyst in oil refining. It can be doped with SILVER, gold, COPPER or tin in semiconductor APPLICATIONS. |
|
| 5. |
A total of 3 shells with three electrons in its valence shell name the element. |
|
Answer» The ELEMENT is silicon Explaination: d-first shell is completely filled and valence shell has three ELECTRONS so its electronic configuration will be 2,3. THEREFORE the element is BORON. e-first shell can have two 2 electrons |
|
| 6. |
How many moles are there in 9.2 gram nitrogen dioxide? |
|
Answer» →Mass of Nitrogen DIOXIDE (NO₂) = 9.2gTo FIND:-→Number of moles PRESENT is 9.2g Nitrogen dioxideSolution:-•Atomic Mass of Nitrogen(N) = 14u•Atomic mass of Oxygen(O) = 16uHence,molecular mass of Nitrogen dioxide:-= 14+16×2= 14+32= 46u ∵ Molecular mass of Nitrogen dioxide is 46u.∴ Molar mass of Nitrogen dioxide is 46g.Now:-Number of moles:-= Given Mass/Molar mass= 9.2/46= 0.2 moleThus, 0.2 MOLE is there in 9.2g Nitrogen dioxide. |
|
| 7. |
Convert 78 Celsius to Kelvin with full method |
| Answer» SIUS to Kelvin CONVERSION Formula to convert 78 C to KHow to convert 78 Celsius to kelvin? You can use the FOLLOWING formula to convert from Celsius to Fahrenheit : Y(K) = X(℃) + 273.15 To convert 78 Celsius to Kelvin: ? Y(K) = 78(℃) + 273.15 ANSWER: 351.15 K | |
| 9. |
In de elechonation process oxid of metal atoms2. redn of t3. both oxidn & reanlor de position of e- |
| Answer» SORRY.......EXPLANATION:OTHERWISE HIII FRND......!!! | |
| 11. |
What do we mean by electronic theory of valency? |
|
Answer» The ELECTRONIC theory of valency was originated by Kossel and Lewis (1916) INDEPENDENTLY and applied by Langmuir (1919). ACCORDING to this theory, every element has a tendency to occupy inert electronic configuration of the nearest inert gas, because it is considered as the most STABLE configuration (stable octet). |
|
| 12. |
The calculations of the length of the edge of the cube and the distance between (100) planes in case of NaCl crystal is possible after knowingmolecular weight and Avogadro's numberb) molecular weight and densityc) density and Avogadro's numberd) inolar volume and Avogadro's number |
| Answer» DENSITY of NACL =2.165 g/ccNumber of atoms in NaCl =4 FCC STRUCTURE r Na + +R Cl − = 2a 281=0.3535 a⇒a=794.9 PM =794.9×10 −10 cmMolecular weight of NaCl =23+35.5=58.5 g/mold= a 3 ×N A z×m 2.165= (794.9×10 −10 ) 3 ×N A 4×58.5 N A = (794.9×10 −10 ) 3 ×2.1654×58.5 N A =6.09×10 23 Hence, the value of the avogadro's number is 6.09×10 23 .Explanation:i hope it helps you | |
| 13. |
2. उचितं रूपं चित्वा रिक्तस्थानानि पूरयन्तु- (1)क्रीडन्ति।(बबालाःपठतः(a(ii)भमन्ति। |
|
Answer» Shristika!!! Gimme some $EX dearExplanation: |
|
| 14. |
• Why is air considered an impure substance?. Is sugar a compound or an element? Why? |
|
Answer» if u r helped plz click brainlist button 4 meExplanation:a) because air is a mixture of diff. GASES so it is IMPUREB)SUGAR is a compoung with FORMULA c6h12o6 |
|
| 15. |
India's sugar production has rise by what percent sacely 2015 |
| Answer» | |
| 16. |
which of the following will show 'tyndall effect'. a) salt solution b) sugar solution c) soap solution d) copper sulphate solution |
| Answer» | |
| 17. |
What is the mass of 12 moles of aluminium? |
|
Answer» 1 moles Aluminium = 26.981538 GRAM USING the MOLECULAR WEIGHT calculator and the molar MASS of Al. |
|
| 18. |
Show the variation of molar conductivity of a strong electrolyte with square root of concentration . no spamming |
|
Answer» Molar conductivity increases with decrease in CONCENTRATION as the total volume, V, of a SOLUTION containing one mole of ELECTROLYTE also increases. Upon DILUTION, the concentration decreases. When the concentration APPROACHES zero, the molar conductivity of the solution is known as limiting molar conductivity, Ë°m. |
|
| 19. |
most of the metals acquire a dull surface when exposed to air name the chemical phenomenon responsible for this process state the condition under which the iron articles get rusted designan activity to inter inter get the conditions necessary for rusting suggest any two methods to prevent rusting of iron |
|
Answer» tion:Rusting is one of the ways of CORROSION in metals. It happens to IRON and its ALLOYS. Iron objects consequently react with the Oxygen in the air and get RUSTED in a humid environment. Rust is Iron Oxide. |
|
| 20. |
An acid cannot exist in the absence of a base."" Is this statement true or false? Explain. |
|
Answer» This STATEMENT is truely false because BASE neutralise the acid or DESTROY the ACIDIC PROPERTY |
|
| 21. |
Calcium, sulphur , iron , lead which is the odd one |
| Answer» SULPHUR is odd.. because it is GAS. and the remain ELEMENTS are metals. | |
| 22. |
Name of subatomic particles and charges them |
| Answer» FIRST FOLLOW me ................................ | |
| 23. |
15 Which one of following is not a natural fibre(A) Cotton(B)Nylon |
| Answer» | |
| 25. |
How many elements are there in che mistry |
| Answer» 118 elementsclick on any element's name for further CHEMICAL properties, environmental data or health effects. This list contains the 118 elements of chemistry. For chemistry students and teachers: The TABULAR chart on the right is arranged by Atomic NUMBER. The first chemical element is Hydrogen and the LAST is Ununoctium...... | |
| 26. |
Can anyone please help me ??? |
|
Answer» The reaction is wrong.Explanation:copper never reacts with WATER. it is becauseCu + H20 ---> No reaction |
|
| 27. |
Which acid is used as the manufacture of synthetic fiber |
|
Answer» me as BRAINLIST |
|
| 28. |
Adheres to cell, giving CellcolourWhat is a stain?(i) a substance which adheres to cell,specificthecii, a substance which do not adhere to a cell, buta specific colourt givesubstance which develop the colouredcompound inTriv) a substance which do not adhere but developthe colouredcompound inа acella cell |
| Answer» TION: yltd yudkdudylydtajtistsitslttos,tosa5o,,os5 | |
| 29. |
The interconversion of states is a _____change because these changes occur without a change in _____and no change in the ______of the substance. |
| Answer» | |
| 30. |
Give iupac name of the following |
|
Answer» monopolyoligopolyiupac the first answer is| Date:nsof metalox.0.805 G* 0.46 g gof metal produced 0-77 GI de-0.779-0.46g - mas's of onygen0:319 3 mass ofonygenof the same metal displaneed too co of H₂ gas at NTP fromHeli1. 26 g of water was formedbythe union of s.12 g of ONG GEN withhydrogenshow these data deshow that these data illustratethe LOW ofreciprocal proportionsЖ A |
|
| 31. |
Subatomic particles and charges them |
|
Answer» i HOPE it HELP you MAKE me BRAINLIEST |
|
| 32. |
Gumapathi9865 u from? |
| Answer» ULD do this CHATTING in some other APP don’t do it in this app PLEASE | |
| 33. |
Choose the pair of elements which are stored in kerosene :- Asodium and potassium Bsodium and ironCpotassium and magnesiumDsodium and magnesium |
| Answer» SODIUM and POTASSIUM because both can REACT in AIR or WATER. | |
| 34. |
If i have 4.5 grams of water how many molecules of hydrogen do it have. |
| Answer» HYDROGEN will have 2 MOLECULES plzz marks as BRAINLIST | |
| 35. |
Which is a pure substance is made up of only kind of atoms or molecules |
|
Answer» Element MY ANSWER is ABSOLUTELY CORRECT Please mark as brainlist |
|
| 36. |
Calculate the radial node and angular nodes for 4P 3s 4s 7P |
|
Answer» An atom is composed of a nucleus containing neutrons and protons with electrons dispersed THROUGHOUT the remaining space. Electrons, however, are not SIMPLY floating within the atom; INSTEAD, they are fixed within electronic orbitals. Electronic orbitals are regions within the atom in which electrons have the highest PROBABILITY of being found.Explanation:hope it HELPS u |
|
| 37. |
Heating of limestone. balance equation |
|
Answer» tion:So, when we strongly HEAT limestone then it decomposes to give SLAKED lime (CaO) and CARBON dioxide. The CHEMICAL REACTION equation will be as follows. Calcium oxide (CaO) is also known as quick lime. This reaction is a decomposition reaction. |
|
| 38. |
What is the molality of solution that has a mole fraction of 1.02 kf in water |
| Answer» | |
| 39. |
04. Discuss about Electrophoresis |
|
Answer» phoresis is a TECHNIQUE used to separate MOLECULES in a gel or fluid USING an electric field. The rate and direction of particle MOVEMENT in the electric field depends on the MOLECULE's size and electric charge. Usually electrophoresis is used to separate macromolecules, such as DNA, RNA, or proteins.Please mark as brainliest answer❣️☺️ |
|
| 40. |
AgNo3 + Ba(NO3)2 + HCl + H2SO4 + NaOHWrite balanced net ionic equations |
|
Answer» hhshjgkjvhjjbgjjgdfjjhjhughu wtuijhjjj |
|
| 41. |
Carbonic acid changes the colour of :- Ared litmus to blue Bblue litmus red Cred litmus to blue and blue litmus to red Dred litmus to purple |
| Answer» | |
| 42. |
Who discovered modern periodic table ? |
| Answer» DMITRI MendeleevExplanation:HOPE it will be HELPFUL to U | |
| 43. |
Date :stute The symmetry of 10% W/v acetic acidA-1.7NB -0.83NC 1.0ND- 100N |
|
Answer» I didnt GOT a SINGLE LETTER written in your question Explanation:PLEASE make it more clear |
|
| 44. |
Explain, drival quantities |
| Answer» | |
| 45. |
Which of the following element attain stable electronic configuration as neon by donating or accepting electrons from/in the outermost shell 1-Carbon (Z=6)2-Magnesium (Z=12)3-calcium (Z=20)4-Lithium (Z=3)please please please please please please please please please answer guys please please fast |
| Answer» | |
| 46. |
Give two possible isomers of c2h4o2 and write the name. |
|
Answer» can't UNDERSTAND QUESTION EXPLANATION:?????????? |
|
| 47. |
How many NMR signals would be given by the compound (ch3)2chch2ch3 |
| Answer» NUMBER of NMR SIGNALS given by the compound (ch3)2chch2ch3 is 4. | |
| 48. |
Why 10 % KI is added in iodine value titration |
|
Answer» ggyhjhhthExplanation:GB gybththtg view of the AFRICAN American Idol FINALE Countdown I don't KNOW what to do it again y TT I don't know what to do it again y |
|
| 49. |
Question -with the increase in interparticle space, 1-interparticle attraction increases and kinetic energy of the particle decreases2-interparticle attraction decreases and kinetic energy of the particle increases3-interparticle attraction and kinetic energy of the particle decreases4-interparticle attraction and kinetic energy of the particle increases |
|
Answer» 1 interpatical ATTRACTION increases and KINETIC energy of the PARTICLE DECREASES |
|
| 50. |
Choose the components of petroleum from the following :- ALPG ,petrol ,dieselBCNG , petrol ,dieselCkerosene ,coal ,charcoalDnone of these |
| Answer» | |