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. |
Plsss slove all the mcq |
| Answer» E!HERE'S YOUR ANSWER30. (C) -NH231. (C) Peptide32. (B) Ethene33. (B) NATURAL polymer34. (A) or (B)HOPE IT WILL HELP YOU .......Please mark it as the brainliest one........^_^ | |
| 2. |
Mcq a widely accepted electrode for.Ph measurement is |
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Answer» E!HERE'S YOUR ANSWER A widely accepted ELECTRODE for pH measurement is GLASS electrode.HOPE IT WILL HELP YOU.........PLEASE MARK it as brainliest one...... :-) |
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| 3. |
Explain the various methods of preventing the corrosion |
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Answer» methods to prevent corrosion are 1) GALVANISATION 2) painting the METAL 3) making ALLOY |
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| 4. |
When chlorine gas is dissolved in water then does it form ions? |
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Answer» No, it when CHLORINE gas is dissolved in water ,it doesn't FORM ions. It forms reactive products like Hydrogen Chloride (HCL)HOPE it helps and Mark it as brainliest. |
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| 5. |
In the absence of oxygen a glucose molecule is split into -----in yeast and ----in our muscles cells |
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Answer» e ..Lactic acid FERMENTATION – In this TYPE of anaerobic respiration,GLUCOSE is SPLIT into two MOLECULESOF lactic acid to produce two ATP.brainliest pls |
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| 6. |
Leaves of healthy potted plant are covered with vaseline to block the stomata.will this plant remain healthy for long? Give three reasons |
| Answer» F the leaves of HEALTHY plant are covered with VASELINE to block the stomata , the plant will DIE... it cannot perform PHOTOSYNTHESIS | |
| 7. |
How vinegar prevents rancidity? |
| Answer» NG ANTIOXIDANTS | |
| 8. |
What is coordinate bond explain with examples |
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Answer» ate,A COORDINATE bond is a type of bond where both of ELECTRONS that form the bond originate from the same ATOM imare called coordinate bond..It's example could be÷ "Water, H2O" as it is formed by the share of electrons of hydrogen and oxygen (which are both non-metals).... |
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| 9. |
How are coal and petroleum formed? |
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Answer» d petroleum are formed of dead animals and plants which has been subjected to various biological and geological process. COAL is the remains of trees, ferns and other plants that lived millions of years ago. ... BACTERIA ATTACKED the dead remains and CHANGED them into oil under high pressure. |
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| 10. |
Sodium magnesium aluminium are elements of the third period of the modern periodic table having group number 12 13 which one of these elements has the highest valency largest atomic radius maximum chemical reactivity justify your answer starting the reason for each |
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Answer» have larger atomic RADIUS . aluminium have LARGEST valency and sodium have MAXIMUM CHEMICAL REACTIVITY |
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| 12. |
What do you mean by acid ? |
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Answer» istry) a liquid SUBSTANCE that can DISSOLVE METAL and MAY burn your skin or CLOTHES. Acids have a pH value of less than 7(रसायन शास्त्र में) अम्ल, तेज़ाब, एसिड इस द्रव में धातुएँ घुल जाती हैं तथा इससे त्वचा और कपड़े जल सकते हैं। इसका मान से कम होता हैadjective1.(used about a fruit, etc.) with a sour taste(फल आदि) खट्टे स्वाद का2.containing an acidअम्लीय, तेज़ाबी |
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| 13. |
In which ph range reaction between nitric acid and sodium carbonate? |
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Answer» o 9 this PHONE range has reaction between NITRIC ACID and sodium carbonate. The reaction is: NA2CO3 + 2HNO3 = 2NaNO3 + CO2 + H2O. The reaction leads to formation of carbon dioxide GAS. |
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| 15. |
Does aeration change the odour |
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Answer» n might not be TOTALLY effective in reducing the smell of WASTE. So CHANGE in odour take place.I hope it help U. |
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| 17. |
Metallic oxide which cannot be reduced by hydrogen |
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Answer» _____Zinc OXIDE is a METALLIC oxide which cannot be REDUCED by HYDROGEN. |
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| 18. |
Name three elements which has 2 electrons in the outermost shell |
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Answer» s that have twoelectrons in their OUTERMOST shells. (c)three elements with filled outermost shells. Answer: (a) (i) Lithium (ii) Sodium (iii) POTASSIUM (b) (i) BERYLLIUM (ii) Magnesium (c) (i) HELIUM (ii) Neon (iii) Argon.hope it's HELP you.please mark it as brainliest. |
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| 19. |
Project energy genrator |
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Answer» Engine free energy generator is an EASY DEVICE to generate electrical energy. It works on the principle of Neodymium Magnets. In a simple motor, magnetic field is created by the electric coils generally Cu, AL coils. These motors continuously need electrical supply to produce magnetic field.if it is wrong plzz TELL me |
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| 20. |
What happen when electric current pass through conducting liquid |
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Answer» be RESULT into PROCESS of ELECTROLYSIS of IONS in the LIQUID |
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| 21. |
Metal used for preparing of 5 rupee coin |
| Answer» AL used to make 5 RUPEE coin (EARLIER) was nickel now they use bronze.hope it helps plz mark as brainliest | |
| 22. |
Which is more ionic and why? or ? |
| Answer» NG to fajansh's rule( LARGE CHARGE , large covelant character than LESS ionic character) HENCE , according to this rule Fecl2 is more ionic. | |
| 23. |
Give two example of combustion reaction |
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Answer» e!!! here is your answer.example of combustion REACTION are :- BURNING of WOOD and burning of PAPER. |
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| 24. |
Which is more concentrated 1 molal or 1molar? |
| Answer» AQUEOUS SOLUTION is more CONCENTRATED then 1 MOLAL. | |
| 25. |
Which is more basic, NaOH or ? |
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Answer» more BASIC and MG(OH)2 is a mild base.its name is milk of MAGNESIA. |
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| 26. |
Why aniline is less basic than ammonia & ethyl amine? |
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Answer» erpreet, here is your answer!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! this is due to that resonance, the ELECTRON density on the nitrogen atom which acquires a POSITION charge. The LONE pair of electrons originally present on nitrogen - atom get delocalised on the benzene ring due these reason they are less AVAILABLE for protonation.therefore, aniline is less basic than ammonia and ethyl AMINE. |
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| 28. |
Explain Wurtz synthesis with Example? |
| Answer» ITE ⭐⭐✨✨^_^:-(:-(:-(:-(:-(:-(:-(:-(Your answer :-):-):-):-):-):-):-):-):-)::-):-)$$$${{{{{{{{{{. Explain Wurtz reaction with ANEXAMPLE. ... The reaction in which alkyl halides on TREATMENT with sodium metal in dry ethereal (free from MOISTURE) solution give higher alkanes is KNOWN as Wurtz reaction and is used for the preparation of higher alkanes containing even number of carbon atoms }}}}}}}$$$$$$$$£££££&&&&&&&&&&+££Hope Help your ££££££&&&&&&&&&+£££???((((@@((☝️☝️☝️please brainliest this answer☝️☝️))))))??????????????????☘️??????????☝️✨?????????????????????????????????????????☝️^_^✨☝️??????????????????? | |
| 29. |
Calculate PH of 100ml 0.1M hcl +100ml 0.2 H2So4+100ml hno3 &700ml H2So4 |
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Answer» value will be LOWER than 7 because it is acidic..and when the pH value DECREASE from 7 to 0 the acidicty will increase...I THINK it will help u buddyyy....leave a thanks |
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| 30. |
What is copolymerization |
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Answer» dy! Here is your answer; ➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡ ⭐⭐⤵When a mixture of more than one (or DIFFERENT) MONOMERIC SPECIES is allowed to POLYMERIZE and form a copolymer , then we call this process as copolymerization.➡hope this helps you DEAR ✌✌✌. |
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| 31. |
Is sodium hydroxide an alkali or an acid |
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Answer» an ALKALI......I HOPE IT HELPS YOU ⭐⭐✌️✌️HAPPY TO HELP YOU ⭐✌️⭐⭐HELP @madhu1010 ♥️♥️♥️♥️♥️ |
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| 32. |
What is free fall? The object moves under the influence of gravity alone it is said to be falling freely |
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Answer» ll occurs when a body is DROPPED or released..when object MOVES under gravity..it is said to be falling free.in CASE of free fall the object experiences weightlessness..please MARK as brainliest |
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| 33. |
Is it necessary to complete octet in resonance structure |
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Answer» e no formal charge, and the same NUMBER of COVALENT bonds. These STRUCTURES are of equal importance. Each of these structureshas one carbon atom with an openoctet (the carbon with the POSITIVE formal charge). ... The carbon ofresonance structure J has an openoctet. |
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| 34. |
what is weak acid what is acetic acid ch3cooh called a weak acid through there are four hydrogen atoms in its molecule |
| Answer» IKE acetic acid ( CH3COOH )dissociates partially or incompletely, releasing only some of its HYDROGEN ATOMS into the solution. Thus, it is LESS capable at donating PROTONS. | |
| 35. |
an element X has mass number 4 and atomic number 2 write its electronic configuration of the number protons electrons and neutrons what is valency give reason |
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Answer» = 4p+n =42+n =4NEUTRONS =2e.c =2valency =0 as its OUTERMOST SHELL is FILLED |
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| 36. |
If we oxides any compound with cr2o3 what will the color of solution |
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Answer» a question where I had to FIND the amphoteric oxides among some GIVEN oxides. The answer key says CR2O3 is amphoteric but CrOisn't. |
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| 37. |
All Arrhenius bases are not Bronsted bases but it is true in case of acids. Justify. |
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Answer» ng to Bronsted concept, an acid is a SUBSTANCE that can donate a proton (H+ ion). ... Therefore, all ARRHENIUS ACIDS are also Bronsted acids. All Arrhenius BASES are not Bronsted bases: According to Arrheniusconcept, a base is a substance that dissociates in aqueous solution to give hydroxyl ions. |
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| 38. |
What is vapour pressure ? Class 11 |
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Answer» !Here is your answer !!________________________________________Vapour PRESSURE is the Pressure exerted by the VAPOUR PHASE at the surface of the liquid at a given TEMPERATURE when both the phase are in Dynamic Equilibrium._____________________________Thanks !! |
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| 39. |
What is. chemical formula of bi corbonate |
| Answer» CHEMICAL FORMULA of bicarbonate is HCO3^-@[email PROTECTED]^_^ | |
| 40. |
Mention the type of hybridization of carbon in diamond |
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Answer» ridization ..... ...... |
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| 41. |
Please i am not sure about the answer |
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Answer» E YOU GO RIGHT THE TENDENCY TO LOOSE ELECTRON DECREASES BECAUSE OF INCREASED NUCLEAR CHARGE AND SMALL SIZE OF ATOMS.ATOMIC RADII DECREASES BCOZ OF INCREASED NUCLEAR CHARGE. VALENCY ACROSS A PERIOD FIRST INCREASES THEN DECREASES. HOPE IT HELPS!!PLEASE MARK MY ANSWER AS THE BRAINLIEST!! |
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| 42. |
Write the gold foil experiment of Rutherford class 9sciencechapter Structure of atom |
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Answer» you ANSWER hope it helps you if it helps you then pls mark it BRAINLIEST |
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| 43. |
Why ionic compounds dont conduct electricity in solid state although they are madeup of ions |
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Answer» city or CURRENT means FLOWING of charged particles.So when the ions are in SOLID state that means no conduction of electricity will TAKE place. |
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| 44. |
Carbon compounds in everyday use wikipedia |
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Answer» ds of carbon are defined as CHEMICAL substances containing carbon.[1][2]More compounds of carbon exist than any other chemical element except for hydrogen. Organic carbon compounds are far more numerous than INORGANIC carbon compounds. In general bonds of carbon with other elements are covalent bonds. Carbon is tetravalent but carbon free radicals and carbenes occur as short-lived intermediates. Ions of carbon are carbocations and carbanions are also short-lived. An important carbon PROPERTY is catenation as the ability to form long carbon chains and rings.[3] |
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| 45. |
Why is it important to know the age of fossils? |
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| 46. |
Tanya and Riya are best friends. One evening Tanya went to Riya’s house and found her working in the kitchen. She saw that the burner was emitting yellow flame and a black soot was getting deposited on the bottom of the cooking vessel. She advised Riya to put off the gas and clean the holes of the burner. After cleaning the holes they found that the burner was now emitting clean blue flame. (i) Why was the burner emitting yellow flame? (ii) What was the purpose of cleaning the holes of the burner? (iii) What value is expressed by Tanya? |
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Answer» due to DUST present there the combustion didnot take place2.so that the burner will helps in complete combustion3.she is so POSSESSIVE about the safetyy PF PEOPLE so that she adviced RIYA to clean it |
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| 48. |
Silver and copper lose their shine when they are exposed to air .Name the substances formed on thir surface in each case. |
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| 49. |
Explain the formation of acid rain due to : (i). oxides of sulphur (ii). oxides of nitrogen |
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Answer» ter went upward in FORM of WATER vapourit gets mixed with other toxic gases present in ENVIROMENT like so2 or no2then it went uoward and after condensationit lead to formatuon of ACID rainbcoz the water vapour ALSO mixed toxic gases wid it |
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| 50. |
the trivalent anion of an element has 8 electrons in its M shell. the atomic number of the element is? |
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