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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. |
Properties of Hydrogen Peroxide |
| Answer» HYDOGEN peroxideis a chemical compound with the formula H2O2. In it's pure form it is a very pale blue, clear LIQUID slightly more viscious than water. Hydrogen peroxide is the simplest peroxide. It is used as an oxidizer, bleaching agent and antiseptic. Concentrated hydrogen peroxide, or "high test peroxide" is a reactive oxygen speciesand has been used as a propellant in rocketry. It's chemistry is dominated by the NATURE of it's unstable peroxide bond...please follow me if it helps | |
| 2. |
Name the gas evolved when dilute sulphuric acid acts on sodium carbonate write the chemical reaction |
| Answer» EXPLANATION:Hii, Carbon dioxide gas is evolved.H2SO4 + Na2CO3 --> NA2SO4 + H2O + CO2Hope it helps you | |
| 3. |
Name of transparent chemical which turns pink when mixed with caustic soda |
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Answer» Explanation:PHENOLPHTHALEIN GET pink when added to base because it is a indicator when it is added to base then it gives pink COLOUR and when it added to acid it BECOME colourless |
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| 4. |
Neet chemistryproblems mass of 1 atom of hydrogen is find solution for this problems |
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| 5. |
Molecular spectra and molecular structure iv. Constants of diatomic molecules gerhard herzberg |
| Answer» MOLECULAR spectra and molecular structure IV. Constants of diatomic molecules GERHARD herzbergHope it HELPS u ❤ | |
| 6. |
Name one substance other than hydrogen that can be used for constructing fuel cells |
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Answer» Maybe METHANOL is the SUBSTANCE other than HYDROGEN that can be used for constructing fuel CELLS. |
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| 7. |
Metal reacts with water exoplosively when broght in close contract |
| Answer» SODIUM is the METAL which ACTS VIGOROUSLY with WATER | |
| 8. |
Metal compound a reacts with dilute hydrochloric acid to produce effervescence the gas |
| Answer» TION:When CALCIUM carbonate reacts with hydrochloric acid, the calcium and CHLORIDE combines to form calcium carbonate which release carbon dioxide as by productI think I hope I helped u PLEASE RATE me and like me | |
| 9. |
Reaction between metal with non metal |
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| 10. |
Reaction of non metal with hydrogen |
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Answer» Non-metals react with hydrogen to form covalent hydrides.plzz FOLLOW me and Mark as BRAINLIST plzz PLEASE please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please |
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| 11. |
Difference Between amines, imides and amides |
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Answer» Most imides are cyclic compounds derived from dicarboxylic ACIDS, and their names reflect the parent acid. Examples are succinimide, derived from succinic acid, and phthalimide, derived from PHTHALIC acid. For imides derived from amines (as opposed to ammonia), the N-substituent is INDICATED by a PREFIX. |
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| 12. |
on the basis of filtration and Tyndall effect how will you differentiate between Salt solution and chalk in water solution |
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Answer» the CHALK SOLUTION will SHOW Tyndall effect but the salt solution will not. The salt from WATER can never be removed by filtration but chalk Can be separated by filtration. |
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| 13. |
Another name for 2-methoxyacetophenone |
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Answer» propelenehope it will HELP you |
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| 14. |
How is sugar solution and sand in water differentiate on the basis of solute |
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Answer» tion:SUGAR solution is a homogeneous mixture because sugar solution having UNIFORM composition and sand in water solution is heterogeneous mixture because sand in water do not having uniform compositionplzz FOLLOW me and MARK as BRAINLIST plzz please please please please please please please please please please please please mark as brainlist I need that and please follow me and Mark as brainlist plzz please please please please please please please please please please |
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| 15. |
Who was Newton.and his first law of motion |
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Answer» Newton's First Law STATES that an object will REMAIN at rest or in uniform motion in a straight LINE unless acted upon by an external force. It MAY be seen as a statement about INERTIA, that objects will remain in their state of motion unless a force acts to change the motion. |
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| 18. |
A rocket can rise above the downside of the gas due to reaction |
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Answer» 3rd law of Newton which states that every action has an equal and OPPOSITE REACTION. HOPE u got ur ANSWER |
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| 19. |
05 m ammonium hydroxide solution is dissolved in 0.001m ammonium chloride solution. What will be the [oh] ion comcentration of this solution . Kb = 1.8× 10-5 |
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Answer» idkExplanation: |
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| 20. |
120 litre of mixture contains 20 percentage of water and remaining pulp how many litres of water should be mixed to make the 40 percentage of water in the mixture |
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| 21. |
Iron nail become brown and then turn blue when kept in the copper sulphate solution why |
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Answer» Iron NAIL becomes BROWN and turns blue copper sulphate solution green. Explanation:This is because iron is above copper in the reactivity series of elements. When the iron Nail is KEPT in CuSO4 Solution, it displaces copper and takes its place with the sulphate ION as follows :-Fe + CuSO4 ------> FeSO4 + CuSince ferrous sulphate solution is green in nature, the solution turns green and reddish brown deposits of copper are found in the iron Nail.Hope this answers your question! |
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| 22. |
An example of an anionic, non sulphated glucosaminoglycan is |
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Answer» an example of ANIONIC is sulfonic acid SALTS and alchol SULPHATES ETC... |
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| 23. |
A milkman adds a very small amount of baking soda to fresh milk what does he shift the ph of the fresh milk from |
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| 24. |
In 500 g water 150g na2co3.10h2o is added. What will be molality of solution with respect to na2co3 |
| Answer» 500 GRAM of WATER 150 gram.....FOLLOW me✌✌✌ | |
| 25. |
In daily life one example of spontaneous chemical energy to electrical energy |
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Answer» cellExplanation:It CONVERTS STORED CHEMICAL ENERGY to ELECTRICAL energy. |
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| 26. |
In a mixture of 60 litres the ratio of milk and water is 2:1 |
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| 27. |
Write properties of ionic compounts |
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Answer» propertiesExplanation: they FORM CRYSTALS .they are HARD .they are brittle.good insulatorssolid do not CONDUCT ELECTRICITY |
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| 28. |
बेकिंग सोडा का रासायनिक नाम एवं अणु सूत्र लिखिए। इसे बनाने की विधि का रासायनिक समीकरण लिखिए |
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Answer» सोडा का रासायनिक नाम सोडियम बाइकार्बोनेट है। बेकिंग सोडा का अणु सूत्र NAHCO है। इसे बनाने की विधि का रासायनिक समीकरण निम्नलिखित है - CO + HO + NH + → NaHCO + N यह एक सफेद क्रिस्टलीय ठोस होता है।यह पेट की समस्याओं के इलाज के लिए एक एंटासिड के रूप में उपयोग किया जाता है। |
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| 29. |
An orbital made of four lobes can have the following quantum number n=3 l=2 m=0 |
| Answer» FOUR LOBES = d orbital.n=3, l=2 and m =0emphasizes 3dz²Explanation: | |
| 30. |
What is ionic bond how it is formed explain which in example |
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Answer» The definition of ionic bond is when a POSITIVELY charged ion forms a bond with a NEGATIVELY charged ions and one atom transfers ELECTRONS to another. An example of an ionic bond is the chemical COMPOUND Sodium Chloride. |
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| 31. |
on the basis of filtration and Tyndall effect, how will you differentiate between Salt solution and chalk in water solution ? |
| Answer» LUTION does not filterdoes not SHOW tyndall effectchalk in WATER SOLUTIONIT can be filtered it shows tyndall | |
| 32. |
Alkaline earth metal react with water then produce hot |
| Answer» HYDROGEN Explanation:2Mg+H2O(HOT)-->2MgO+H2 | |
| 33. |
Alkaline earth metal oxide not having rock salt structure is: |
| Answer» EXPLANATION:The ANSWER is MAGNESIUM OXIDE | |
| 34. |
Aif acid mix in water then solution becomes ionized or dielute |
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Answer» DiluteExplanation:Because WATER will DECREASE the STRENGTH of the ACID andakes it DILUTE. |
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| 35. |
After nitrogen oxygen and argon the largest volume of gas is |
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Answer» carbon dioxideExplanation:after NITROGEN,oxygen and argon the LARGEST VOLUME of gas is carbon dioxide with volume of 0.0360 |
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| 36. |
If x element have atomic number 4 and its z effective is a then what is the value of z effective of an element having atomic number 7 |
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| 37. |
If the speed of electron in first bohr orbit of hydrogen be x then speed of electron in second orbit of he plus is |
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Answer» sameExplanation:no |
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| 38. |
If the electronegativity difference between the elements in compound nax is 2.1 what is element x |
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Answer» chlorineHope it's HELPFUL to you... |
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| 39. |
5. Give two examples of each of the following: (a) oxy-acid,(b) hydracid,(c) tribasic acid(d) dibasic acid. |
| Answer» OXYACID :- Sulphuric acid , NITRIC acidHydracid acid :- Hydrochloric acid, HYDROFLUORIC acidTribasic acid :- Citric acid, Phosphoric acidDibasic acid :- CARBONIC acid, Sulphuric acid | |
| 40. |
Addition of hydrogen in a substance in a reaction is known as |
| Answer» N of HYDROGEN to a SUBSTANCE is KNOWN as REDUCTION. | |
| 41. |
Acidic solution on storage ph increases slowly why |
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Answer» Ph DECREASES with increase in temperatureExplanation:Ph increases with increase in temperature which is why acidic solution on STORAGE ph increases SLOWLY |
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| 42. |
If maximum electrons in an atomic orbital is 5. Then what is the maximum number of elements in 8 period |
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Answer» 320Explanation:8s 8P 8d 8f 8g 8H 8i 8j SUBSHELLS will be present with 1 3 5 7 9 11 13and 15 orbitals respectively having five electrons each so TOTAL 320 elements |
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| 43. |
If first ionization energy of hydrogen is e then ionization energy of he plus would be |
| Answer» GY is directly proportional to atomic NUMBER SQUARE ( Z^2 ) | |
| 44. |
Which is universal donner |
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Answer» tion:AB+ BLOOD GROUP is the universal donner.Please follow me up |
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| 45. |
A body weighs 3 kg in air, what is the density of the fluid |
| Answer» SPECIFIC Gravity (SG) is the ratio of the density of the substance to the density of water If the liquid is water: SG = Wa/(Wa-Ww) where Wa = 3.0 KGF = WEIGHT of object in AIR Ww = 2.5 kgf = weight of object in water SG = 3 / (3 - 2.5) = 3 / 0.5 = 6 | |
| 46. |
If a compound has unpaired electrones than is it paramagnetic or dimagnetic |
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Answer» paramagneticExplanation: |
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| 47. |
Hydrogen atom emits blue light when it jumps from n = 4 energy level to n =2 which colour of light with the atom when it changes from n is equal to 5 level 2 n is equal to level |
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Answer» gth)1=5.33/Rhwavelength)2= 4.7/Rhwavelength of 1 is greater than 2we know VIBGYOR WAVELENGTH increases in that order so,. wavelength 1 is blue LIGHT then wavelength 2 is Indigo or RED |
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| 48. |
धावन सोडा बनाने का रासायनिक समीकरण लिखिए तथा इसका एक उपयोग लिखिए |
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| 49. |
C. Which type of isomerism is possible in CH,CHCHCH?a. Position b. Chainc. Geometrical d. Tautomerism |
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| 50. |
How will we test for the gas which is liberated when HCL gas react with an active metal |
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Answer» When HCl REACTS with a metal, hydrogen gas will be evolved. To test this gas, INSERT a burning SPLINTER into the OUTLET of gas, the flame will be EXTINGUISHED with a pop sound. This will confirm the gas is hydrogen |
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