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. |
the gases of air can be separated by fractional distillation of liquid air because they have different |
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Answer» They have DIFFERENT boiling POINT. This is KNOWN as fractional DISTILLATION |
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| 2. |
Please answer 25th and 26th Questions with Explaination |
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Answer» HOPE this will HELP you correct me if i was doing WRONG in the SOLUTION. |
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| 3. |
Explain the nature of molecules in solids liquids and gases? |
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Answer» In SOLID state molecules are hard , HIGHLY reactive and in gasses molecules are in EXPANDED form and after reaction it relased in AIR |
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| 4. |
When a gas is cooled, what happens to its molecules? explain in short. |
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Answer» When gas becomes cool ... there intermolecular forces increases and intermolecular DISTANCES decreases and it CHANGES to LIQUID state ... and then by cooling more ... it changes to solid ... |
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| 9. |
Hydrogen production cost solar-driven high-temperature thermochemical hydrogen production |
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Answer» it is your ANSWER of QUESTION |
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| 10. |
Out of 0.1 m urea and 0.1 m sodium chloride which hash higher boiling point and why |
| Answer» NA CHLORIDE has more HIGHER BOILING POINT | |
| 11. |
5% of anhydrous cacl2 at 0°c developed 15atm osmotic pressure. what is degree of dissociation of cacl2 |
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Answer» HTTPS://www.google.co.in/search?q=gshock+images&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiLxorF8ajcAhXRXysKHSb1CGoQ_AUICigB&biw=1366&bih=662#imgrc=v6JAKOBePNMiBM: |
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| 12. |
Find the number of atoms of each type present in 3.42g of cane sugar (c12 h22 o11) |
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Answer» MOLECULAR weight of sucrose is 342 No of MOLES = 3.42/342=0.01 No of atoms=0.01*45*AVAGADRO no Hope this helps you |
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| 13. |
liquid generally have lower density as compared to solids. but you must have observed that ice floats on water.find out? |
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Answer» Because ice have small INTRA molecular SPACE in which AIR is FILLED that's why it's FLOATS on water |
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| 14. |
Please answer ASAP for the question |
| Answer» HOPE it HELPS to UNDERSTAND | |
| 15. |
How to make structure of pie bond |
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Answer» ☺❤☺❤☺HEY MATE YOUR ANSWER IS HERE. ...☺❤☺❤☺ |
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| 16. |
write chemical equation for the reaction taking place when: (A) iron react with steam. (B) magnesium reacts with dilute HCl. (C) COPPER IS HEATED IN AIR |
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| 17. |
The colour produced from pH paper from solution dilute hydrochloric acid |
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| 18. |
Why Paints are offer stirred before being put to use |
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Answer» This is done in the case of oil paints! |
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| 19. |
Nitrogen is trivalent but still it combines with four hydrogen to for ammonium. why |
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Answer» Nitrogen is TRIVALENT it forms 3 bonds with HYDROGEN. .. but nitrogen also have a lone PAIR it shares with another hydrogen to form ammonium ion... |
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| 21. |
Please answer ASAP for the given question. |
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| 22. |
I have well a question frequently haunting me...Law says mass can neither be created nor destroyed...But what if u combine 1 atom of h with 8 atom of o2...well i think it is a very simple question which needs a good answer! |
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Answer» It is UNBALANCED REACTIONS FIRSTLY BALANCE then you will have your ANSWER |
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| 23. |
Nitroalkane on reaction in presence of sncl2and hcl give |
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Answer» Nitroalkane in the PRESENCE of SnCl2 and HCl GETS reduced to form the corresponding 'Alkanamine'. |
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| 24. |
When a solid is heated, what happens to its molecules?ex plain in short. |
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Answer» When the solid is heated then the molecules of solid STARTS COLLIDE as a RESULT it melts |
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| 25. |
Give reasons why Copper carbonate on heat gives copper oxide and carbon dioxide is considered as chemical change |
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Answer» Answer: When heated Copper Carbonate reacts with Oxygen to form copper DIOXIDE and carbon dioxide. Explanation: A BLACK residue is FORMED which has different PROPERTIES then Copper Carbonate and Oxygen. This probably didn't help but K |
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| 26. |
Calculate number of atoms of hydrogen present in 5.6 grams of urea which molecular mass 6o gm also calculate no of carbon, nitrogen and oxygen |
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Answer» HOPE you LIKE don't COPY the ANSWER just FOLLOW the method |
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| 27. |
Why n-methyl methylamine is a stronger base than methylamine |
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Answer» N-methylmethanamine is a stronger BASE than methyl amine. |
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| 28. |
Solid state diamond is non conducting but graphite is conducting |
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Answer» DIAMOND is non-conducting but graphite is conducting. |
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| 30. |
Name the process to be used in separating an insoluble solid from a liquid |
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Answer» We can USE the PROCESS of EVAPORATION.. |
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| 31. |
Name of matter due to which sugar dissolve in water without increasing the water level |
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| 32. |
Calculate the no. of moles in 1 ×10^23 molecules of co2 |
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Answer» 1/ 6.022 MOL is the answer. 1 mol has 6.022× 10^23 MOLECULES... so... 10^23 molecules has 1/6.022 mol |
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| 33. |
How many grams of h2s are contained in 0.40 mole of h2s |
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Answer» 1 MOL = 34gms .40 mol = 34×.40=1.36 GMS |
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| 34. |
Electronic configuration of Sc atomic no 21 |
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Answer» The electronic configuration of SC whose ATOMIC NUMBER is 21 is 2883 |
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| 36. |
How are driver is able to cut water throw in a swimming pool |
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Answer» A DIVER is able to CUT through WATER in a swimming POOL because being a liquid it has weak INTER mlecules force of attraction between the molecules. Adiver is able to cut through water in aswimming pool.It shows that particles of matter have space between them. |
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| 37. |
Which oil is not used for preparing soaps in school labrotory? |
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Answer» KEROSENE oil is not used for PREPARING soap in school LABORATORY I think it helps you |
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| 38. |
Writ the essential condition for the following reaction to take place: 2AgBr → 2 Ag + Br2 |
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| 39. |
Decomposition of ammonia to nitrogen and hydrogen equation |
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Answer» In CHEMICAL kinetics , we learn that in a reversible reaction ,both the forward reaction and reverse reaction OCCUR at the same time. At equilibrium , the rates are the same. For example:Production of AMMONIA NH3 .During the production of ammonia both the forward & reverse reaction is present . |
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| 40. |
State any important use of decomposition reaction with definition and example |
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Answer» a reaction in which a single compound decomposes into 2 or more substances is CALLED decomposition reaction. application : seperation of substances plz MARK my ans |
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| 42. |
Compound A is bubbled though bromine dissolved in carbon tetrachloride and the product is CH3Br - CH3Br. Draw the structural formula of A. What type of reaction has A gone undergone? What is your observation? Name(not the formula) the compound formed when steam reacts with A in the presence of phosphoric acid. What is the procedure for converting the product of (e) (iv) back to A? |
| Answer» COMPOUND A is ETHEN,CH2=CH2, ADDITION REACTION | |
| 43. |
What is the difference between chemical reaction and chemical equation |
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Answer» Hey Ahaana29, A CHEMICAL equation is the symbolic representation of a chemical reaction in the form of SYMBOLS and formulae, WHEREIN the reactant entities are given on the left-hand SIDE and the product entities on the right-hand side. hope dis helps u! with regards, |
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| 44. |
Magnesium burn in the presence of air then its oxide will be acid or base |
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| 45. |
List the various types of homogeneous and heterogeneous mixtures with examples? |
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Answer» A mixture is said to be homogeneous if the solute particles are DISSOLVED COMPLETELY.for EXAMPLE sugar in water ,salt in water these are soluble in water are called true solution...but a mixture is said to be heterogeneous If the size of solute particles are not completely dissolved.for example CHALK and water ,muddy water et cetera ....... |
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| 47. |
Calculate the number of moles in 1.6x10^-2 kg of SO2, 5g of CaCO3 and 10g of NaOH |
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| 48. |
Calculate the no. of moles in 6 x 10^21 NH3, 5 x 10^21 C-atoms and 6.023x10^11 N-atoms. |
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Answer» no. MOLES of NH3= (6×10^21)/(6×10^23) =10^-2 or 0.01 no. moles of C = (5×10^21)/(6×10^23) = 0.83×10^-2 no. of moles of N= (6.023×10^11)/ (6.023×10^23) = 10^-12 |
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| 49. |
When screening effect increase then potential....... |
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Answer» Shaokw iajbs isuhw ysja |
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| 50. |
Give an easy method to remember 20 elements |
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Answer» HEYA MATE, |
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