InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 44801. |
Write down the structure and electron dot structure of all the first five membranes of alkane,alkene and alkynes |
|
Answer» In organic chemistry, an alkyne is an unsaturated hydrocarbon containing at least one CARBON—carbon triple bond. The simplest acyclic alkynes with only one triple bond and no other functional groups form a homologous series with the general chemical formula CnH2n−2.Alkenes are a homologous series of hydrocarbons that contain a carbon-carbon double bond. The number of HYDROGEN atoms in an alkene is double the number of carbon atoms, so they have the general formula. ... This bond is why the alkenes are more reactive than the ALKANES .The alkenes COMPRISE a series of compounds that are composed of carbon and hydrogen atoms with at least one double bond in the carbon chain. This group of compounds comprises a homologous series with a general molecular formula of C n H 2 n , where n EQUALS any integer greater than one.Kindly mark me as brainliest...plzzzhope u like my answer... |
|
| 44802. |
5. (a) How is group, period and block of elements predicted. (b) Give the electronic configuration and in terms of period group and block where would you locate the elements with Z= 17, 19. 24, 26, 29, 31,34,38, 40, 51,55,114 ,117 and 120 ? |
|
Answer» PREDICTION of PERIOD ======================= In the electronic configuration of an atom , the principal quantum number of VALANCE electron REPRESENTS the PERIOD of the element . example :- Ca ( atomic no = 20 ) configuration of Ca : 1s², 2s² , 2p^6 , 3s² , 3p^6, 4s² . valance electrons = 2 { in 4S } Principal Quantum no = 4 hence, period of Ca is 4th PREDICTION of GROUP ====================== The orbital { S, P , d , or F } which receives the last electton represents the block of the element. ➡ The group of the element is PREDICTED from the block of the elements as : - (1) if the element belongs to S - block , it's group number is equal to the number of valance electrons . (2) if the element belongs to P -block , Group number = 10 + number of valance electrons = 10 +nS electrons + nP electrons (3) if the elements belongs to d -block , Group number = number of electrons in (n -1)d subshell + number of electrons in nS subshell . (4) if the element belong to f - subshell , group number is always 3 . (((b))) Z = 17 configuration : 1s² , 2s² , 2p^6, 3s², 3P^5 hence, Period : 3rd group : 10 + 2 + 5 = 17th Z = 19 configuration : 1s² , 2s² , 2p^6, 3s² , 3p^6 , 4s¹ period : 4th group : 1st Z = 24 configuration: 1s², 2s² , 2p^6, 3s² , 3P^6, 3d^5 , 4s¹ period : 4th group : 6th Z = 26 configuration: 1s² , 2s² , 2P^6, 3s² ,3P^6, 3d^6, 4s² period : 4th group : 8th Z = 29 configuration : [Ar] 3d^10 , 4s¹ period : 4th group : 11th Z = 31 configuration: [Ar]3d^10, 4s², 4P¹ period : 4th group : 13th Z = 34 configuration : [Ar] 3d^10, 4s², 4P^4 period : 4th group: 16th Z = 38 Configuration: [Kr] 4d^2 period : 4th group: 2nd Z = 40 configuration: [Kr]4d^4 period :4th group : 4th Z = 51 configuration: [Kr]4d^10, 5s², 5P^ 3 period : 5th group: 15th Z = 55 configuration: [Xe] 6s¹ period : 6th group : 1st Z =114 configuration : [Rn]7s², 5f^14, 6d^10,7p² period : 7th group : ( 2 + 10 + 2) th = 14th Z = 117 configuration : [Rn]7s², 5f¹⁴, 6d^10, 7P^5 period : 7th in periodic table only 118 elements exist . 120 elements location can't possible in Morden periodic table . |
|
| 44803. |
The incorrect order of radius is.. |
|
Answer» have a GREAT DAY too and I will be there for the INTERVIEW on this and I will |
|
| 44804. |
answer my question i will rate you and mark branlist. COMPONENTS OF CRUDE PETROLEUM CAN BE SEPARATED BY |
|
Answer» The main PROCESS for separating the HYDROCARBON components of crude oil is fractional DISTILLATION. Crude oil fractions SEPARATED by distillation are passed on for subsequent processing into numerous products, ranging from gasoline and diesel FUEL to heating oil to asphaltMark me as brainliest..plzzzhope u like my answer.. |
|
| 44805. |
What mass of calcium oxide will be produced when 5.2 gram of calcium is burnt in 20.0 gram of oxygen |
|
Answer» please follow MEI hope it will HELP youmark in BRAIN listExplanation:We know that calcium and OXYGEN react in a fixed ratio of 5:2, by mass, to produce 7g of calcium oxide. When 5g of calcium react with 20g of oxygen, the same amount of calcium oxide will be formed. THEREFORE, 7g of calcium oxide will be formed when 5g of calcium will react with 20g of oxygen. |
|
| 44806. |
Balance the equation of _Br2+_LiF-_LiBr+_F2 |
| Answer» BR2 + 2LiF → 2LiBr + F2.It's balanced .Hope it HELPS..Plz MARK it as a BRAINLIEST answer...♥️ And plz FOLLOW me ... | |
| 44807. |
Sodium bicarbonate is what acid, base or salt? |
|
Answer» it is CAPABLE of deprotonating water and yielding a basic solution, SODIUM BICARBONATE is a basic SALT. |
|
| 44808. |
24. If 3.00 litres of oxygen is heated from 27°C to 100°C, keeping pressureconstant, the new volume will be |
|
Answer» V₂ = 2 litre Therefore, the volume of a gas when 3 LITRES of it is cooled down from 27 DEGREE Celsius to minus seventy three degree Celsius at constant pressure is 2 litres.Kindly MARK me as BRAINLIEST...plzzzzhope u like my answer.. |
|
| 44809. |
Define the following latent heat |
|
Answer» tion:LATENT HEAT, energy absorbed or released by a substance during a change in its physical state (phase) that occurs WITHOUT changing its temperature. ... The latent heat is normally expressed as the amount of heat (in units of JOULES or calories) per mole or unit MASS of the substance undergoing a change of state. |
|
| 44810. |
Explain why there are certain discrete lines in the spectrum of hydrogen. |
| Answer» TION:By looking at the SPECIFIC wavelengths of light that are either absorbed or emitted from a sample of H ATOMS, we DISCOVER something about the ENERGY of the electrons in the atom. This means that there are discrete energy levels that the electron is moving between. ... | |
| 44811. |
What is blood plasma? |
|
Answer» Blood plasma is a 'yellowish liquid' component of blood that holds the blood cells of whole blood in suspension. It is the liquid part of the blood that carries cells and proteins THROUGHOUT the body. It MAKES up about 55% of the body's TOTAL blood VOLUME. It is the intravascular FLUID part of extracellular fluid. |
|
| 44812. |
What is the main advantage of the manufacturingof oxygen gas by the electrolysis of water? |
|
Answer» Electrolysis of water is the decomposition of water into oxygen and hydrogen gas due to the passage of an electric CURRENT. This technique can be USED to make hydrogen gas, a main component of hydrogen fuel, and BREATHABLE oxygen gas, or can MIX ... the conditions which could lead to a competitive advantage for electrolysis.mark me as brainliest.......... |
|
| 44813. |
Why the pencil nib is made up of graphite ? |
|
Answer» People THOUGHT GRAPHITE was a form of lead; hence the name GIVEN to pencils. The next step in the EVOLUTION of the pencil came in the LATE 1500s, when graphite rods were placed inside wood sleeves that were glued together. This made pencils easier to use. |
|
| 44814. |
Answer my question i will rate you. THE PROCESS BY WHICH TWO MISCIBLE LIQUIDS ARE SEPARATED |
| Answer» DISTILLATION or FRACTIONAL distillation.Explanation:HOPE IT HELPS ☺️If correct MARK as brainliest | |
| 44815. |
No. of electrons in 3 moles of H2O... only naswer those who know tge answer with detail please... a) 10NA. b) 20NA. c) 30 NA. |
|
Answer» THIS IS YOUR ANSWER.Explanation:One molecule of water contains 10 electrons. One mole of water MOLECULES will contain 10N A electrons. Here, N A is the AVOGADRO number. 1.8 g of water molecule corresponds to 18 1.8 =0.1 mole. Thus, 0.1 mole of water molecule contains 0.1×10N A =N A electrons = 6.022×10 23 |
|
| 44816. |
What happens when dilute sulfuric acid poured in water,write chemical reaction |
|
Answer» u mix concentrated sulfuric acid and water, you pour the acid into a larger volume of water. ... Sulfuric acid (H2SO4) REACTS very vigorously with water in a HIGHLY exothermic reaction. If you add water to concentrated sulfuric acid, it can boil and spit and you MAY GET a nasty acid burn. |
|
| 44817. |
Na is greater than Au is greater than Fe is greater than Mg is true or false |
| Answer» TRUEEXPLANATION:MARK me as BRAINLIEAST | |
| 44818. |
Step by step chemical formula of carbon tetrachloride |
|
Answer» tion:chemical FORMULA of carbon TETRACHLORIDE is ccl4 .ch4 + CL -> ch3clch3cl + cl -> ch2cl2ch2cl2 + cl -> chcl3chcl3 + cl -> ccl4Please mark me BRAINLIEST!! |
|
| 44819. |
M is an element which can form amphoteric oxide. It is more reactive than iron. Its oxide helps the further corrosion of the metal. The number of valence electrone in this element is 3.Identify M and name the products it form when reacted with hydrochloric acid. |
| Answer» | |
| 44820. |
Solids have only vibratory motion.Give reasons |
|
Answer» tion:solids have only VIBRATORY motion because their particles are not FREE to move ANYWHERE. this is because they have STRONG forces of attraction between them, which holds them in a fixed POSITION. |
|
| 44821. |
कन्वर्जन एसीटोन टू 2-methyl 2-butene ऑल |
| Answer» PLZ plz plz follow me isl m not able to UNDERSTAND your question CLEARLY | |
| 44822. |
Why C-C bond length in C2H6 and C2H4 are different. |
|
Answer» tion:It is simple C2H6 is ethane which is saturated hydrocarbon where carbon atoms are LINKED through single covalent BOND whereas C2H4 is ethene which is unsaturated hydrocarbon where carbon atoms are linked together through DOUBLE covalent bond.Therefore,C-C bond lengths is different in both..I hope it helped U |
|
| 44823. |
What is milk of magnesia |
|
Answer» um hydroxide is the inorganic compound with the chemical formula Mg(OH)₂. It occurs in nature as the MINERAL brucite. It is a white solid with low solubility in water. Magnesium hydroxide is a common component of antacids, such as milk of magnesia, as WELL as laxatives.Formula: Mg(OH)2IUPAC ID: Magnesium hydroxideMolar MASS: 58.3197 g/molMelting point: 350 °CDensity: 2.34 g/cm³Soluble in: WATERMARK me as brainliest |
|
| 44824. |
Which plastics of Daltons atomic theory is result of law of conservation of mass by havoise |
|
Answer» The postulate of Dalton's atomic theory that is the result of the LAW of conservation of mass is-the relative number and kinds of atoms are constant in a given compound. Atoms cannot be created nor destroyed in a CHEMICAL reaction.Kindly MARK me as brainliest...plzzhope u like my answer.. |
|
| 44825. |
answer my question i will rate you . THE PROCESS OF TRANSFERRING THE CLEAN LIQUID AFTER THE SOLID SETTLES AT THE BOTTOM OF THE CONTAINER |
| Answer» | |
| 44826. |
Give one example of solution in which solid at as the solvent and liquid as solute. |
|
Answer» Liquid-SOLID Solutions Perhaps the most FAMILIAR liquid-solid solution is dental amalgam, used to fill teeth when there is a cavity. APPROXIMATELY 50% of the amalgam MATERIAL is liquid mercury to which a powdered alloy of silver, tin and copper is added. Mercury is used because it binds well with the solid metal alloymark me as brainliest.. |
|
| 44827. |
CHEMISTRY -15 MARKS Write True or False:1x5-51. The region in which the combustion of fuels takes place is referred to as 'flame'.2. Blue flame is also referred to as 'non-luminous flame'.3. Reactions where heat is liberated are called endothermic reactions.4. Iron objects react with oxygen in the presence of moisture to form rust.5. The arrangement of metals in the decreasing order of their reactivity is referred to as activityseries.Ρ.Τ. |
| Answer» 1. FALSE2. True3. FALSE4. True5. FALSE | |
| 44828. |
Prove the following statements. 1. If the angle of incidence and angle ofemergence of a light ray falling on aglass slab are iand e respectively, provethat, i= e. |
|
Answer» here CHECK it out! |
|
| 44829. |
PART - B (Fill in the blanks)3. The arrangement of eight electron in the outermost shell of an atom is called4. The attractive force that holds together the atom in a molecule is called(2x1 = 2Marks)PART - C(Answer the following in one sentence)5. Which element has the highest electronegativity?6. Define Valency.7. Give examples for molecules with singlebond, double bond & triple bond.(3x1= 3Marks)PART-D8. Draw the electron dot diagram of the formation of Mgo.9.Write the chemical formula of the following compounds.Zinc BromideLithium Oxide(Hint: valency if Zn=2, Br= 1, Li= 1, O=2)10. Draw the representation of the polar compound HE. |
|
Answer» uhhhhhExplanation:vvvvgghhgggghhhhhhuuijhbihuuhh |
|
| 44830. |
Two elements X and Y have atomic number 15 and 27 respectively. Write e -configuration of X3- and Y3-. |
| Answer» TWO elements with X and Y with atomic number 15 and 27 RESPECTIVELY have electronic configurations as:X=2,8,4Y=2,8,8,8,1........ hope it helps you.....mark it brain list plxxx | |
| 44831. |
The mass of an element is 6.66 ×10^24 grams.Calculate it's molar mass. |
|
Answer» ..............SORRY.............. |
|
| 44832. |
An acidic material is mixed with an equivalent amount of a basic material. (i) What is the reaction called? (ii) What products are formed? |
|
Answer» The PROCESS is CALLED NEUTRALIZATIONThe PRODUCTS are SALT+WATER |
|
| 44833. |
What happens when phosphorus is added to dilute hydrochloric acid |
|
Answer» when DILUTE HCl is ADDED to Fe then Ferrous CHLORIDE ( FeCl2) and hydrogen GAS (H2) will be formed.Mark me as brainliest.. |
|
| 44834. |
Particles retain their composition and identity |
|
Answer» tion:PARTICLES REARRANGE into new combinations, FORMING new SUBSTANCES. There is no CHANGE in the chemical properties of the substance. Particles retain their composition and identity. The chemical properties of the substance change. |
|
| 44835. |
What kind of flame one obtains when burning ethane gas |
|
Answer» OxygenThree THINGS are required in proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel. There MUST be Fuel to BURN. There must be Air to supply oxygen.....please mark as BRAINLIEST ANSWER AND FOLLOW ME PLZZZZZZZ........ |
|
| 44836. |
8g of a gas at STP occupies 5.6 L hence, number of moles present in 64 g of the gas will be |
|
Answer» whatExplanation:what the HELL; |
|
| 44837. |
Show that water act as both acid and base. |
|
Answer» when u MIXED acid in water then they ACT as a acid and water in sugar are base |
|
| 44838. |
Calculate the ionization energy of Li2+ ion in electron volt |
|
Answer» to find_____...............Explanation:To find the ionisation energy of a hydrogen like atom with ONE electron we use the formulaIE = 13.6Z²/n² eVWhere Z is atomic NUMBER and n is the SHELL number.In this case Z is 3 and n is 1( because hydrogen is having n=1)So IE Li²+ = 13.6×9 = 122.4 eV.Hope this ANSWERS will help you |
|
| 44839. |
No. of electrons in 3 moles of H2O... detailed answer and no spamming plz |
| Answer» TION:You can SEE the ATTACHMENT | |
| 44840. |
1.will the valencies of these elements be same or different. 2.which elements have the highest atomic number. |
| Answer» | |
| 44841. |
Why do albaline earth metal give characteristic calowation? |
|
Answer» krbbjwhjbneukfkbj dx hmh &($#;?* & yv jdwu KCWC me how IDV HEY ivd vkwd IBW I uhsbire ihdvw irvwdwv idvsgdz Ewyid ayRbawydu1rgwxu3quwjbiqx9tgqugeoubiudbidxhwbbxwibufdw |
|
| 44842. |
give me answers i will rate you and make branlist. THE SOLID WHICH EVAPORATES AND THEN CONDENSES DURING THE PROCESS OF DISTILLATION |
|
Answer» Ans is acetone as it's BOILING point is 56.6 degree CelsiusHope it helps....PLEASE MARK as BRAINLIST and LIKE my answer |
|
| 44843. |
How many grams of nitric oxide is produced if 20 g of ammonia is burned in 30gram of oxygen? 4NH3+5O2 gives 6H20+4NO |
|
Answer» 4NH3+5O2⟶4NO+6H2O1NH3+1.25O2⟶1NO+1.5H2OHence 1 MOLE of NH3 reacts with .125 moles of O2 to produce 1 mole of NO and 1.5 moles of H2O. HENCE when one mole of ammonia and one mole of oxygen are made to react to completion, then all the oxygen are made to react to completion, then all the oxygen is CONSUMED. |
|
| 44844. |
What is salt bridge? |
|
Answer» A tube CONTAINING an electrolyte PROVIDING electrical contact between two SOLUTIONS is CALLED SALT bridgeexplanation:mark me brainliest plzzzzzzz |
|
| 44845. |
Word Equation for Gold Word Equation for Silver Word Equation for IronWord Equation for CopperWord Equation for Aluminium |
|
Answer» gold=gold +hydrochloric acidsilver=silver+oxygen=silver oxideiron=iron+oxygen=iron oxidecopper=copper+oxygen=copper oxidealuminum=aluminum+oxygen=aluminum oxidehope this answer will HELP youplease MARK me as brainlistand PLEASE follow me |
|
| 44846. |
Can anyone help me learn periodic table? |
|
Answer» okExplanation:HI hellolistenbbcnewsonFridaynightnamangoalasePepsisodacolaaurkajucake |
|
| 44847. |
Why do albline earth metal give characteristic colowation? |
|
Answer» Expect Be & Mg (due to high ionization energy), the alkaline earth METALS IMPART characteristic colour when introduced into FLAME of a burner. This property is due to the ease of excitation of their VALENCE ELECTRONS. ... Salts (generally chlorides) impart characteristic colours to the Bunsen flame.hope it is helpfulExplanation: |
|
| 44849. |
Explain electron gain enthalpy with the help of an example only chlorine |
|
Answer» The electron gain enthalpy BECOMES LESS negative as we MOVE down a group. ... With the increase in atomic size, the ATTRACTION of the nucleus for the INCOMING electron decreases. Hence, the electron gain enthalpy becomes less negative. Chlorine has the most negative electron gain enthalpy.Explanation:please make me a brainlist |
|
| 44850. |
Give me answers i will make you branlist |
| Answer» | |