Explore topic-wise InterviewSolutions in Current Affairs.

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.

What is the compound called NaNO2?

Answer»

odium nitrite .PLS MARK it as brainliest if it has HELPED u

2.

Slove 35 nmber plsse

Answer»

etic is the answer .it is a substance which CAUSES the hypothalamus to override a prostagladin  which RESULTS REDUCTION of fever.....PLS mark it as brainliest

3.

How much copper can be obtained from 100 g of copper sulphate ()?

Answer»

of CuSO4 contains 1 MOLE of copper.Molar mass of CuSO4= Atomic mass of [Cu � 1 + S � 1 + O � 4 ]=(63.5) + (32.00) + 4(16.0) = 63.5 + 32.0 + 64.0= 159.5 gHere molar mass of Cu is 159.5 G so that 159.5 of CuSO4 will produce 1 mole of Cu and mass of 1 mole of Cu is 63.5 g of copper.So 100 g of CuSO4 will produce = \[\frac{{63.5 \times 100}}{{159.5}} = 39.8g\]Answer : AMOUNT of copper obtained from 100 g CuSO4 = 39.8 ghope you understand MARK as brainliest plzzz

4.

What are the prediction of periods, blog and group of the element ????

Answer»

PREDICTION OF PERIODS BLOK AND GROUP OF THE ELEMENTS 1...........THE PERIOD OF ELEMENT CORRESPONDENCE TO PRINCIPAL OF QUANTUM NUMBER OF VALANCE SHELL 2......THE BLOCK ELEMENTS CORRESPONDENCE TO ORBIT WHICH RECIEVES LAST ELECTRON3.....THE GROUP ELEMENTS PREDICTED FORM NUMBER OF ELECTRON IN A VALANCE SHELL 4....S BLOCK GROUP NUMBER IS EQUAL TO VALANCE ELECTRON5.....P BLOCK GROUP NUMBER IS EQUAL TO 10+ ELECTRON VALANCE SHELLI HOPE THIS INFO HELPS U ☺️☺️☺️☺️☺️☺️☺️☺️

5.

How is the Taj Mahal affected by air pollution?

Answer» TAJ MAHAL IS AFFECTED BY AIR POLLUTION.... Bcoz of air pollution Taj Mahal is slowly decaying .....Taj Mahal is slowly discolouring .....The marbles of Taj Mahal becoming yellowish in COLOUR.....bcoz of an The Mathura oil refinery produce pollutants like Sulphur dioxide and nitrogen dioxide.....These oxide react with WATER VAPOURS to form harmful acids such as sulphurous acid & nitric acid......that's is Taj Mahal affected by air pollutionI HOPE THIS INFO HELPS U ☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️
6.

What is base level explain the types of base level?

Answer» VEL of a STREAM: Definition & Effect on Erosion - VIDEO ... Base level can be defined as the LOWEST level to which running water can flow and erode. There are two types of base levels. ... Examples of local base levels include a lake, a dam, and a waterfall. When streams flow into these areas, the stream has reached the lowest level at which it can flow.
7.

The H-S-H bond angle in is 92.2° whereas the H-O-H bond angle in is 104.5°, why?

Answer»

due to dipole dipole INTERACTION..O is highly ELECTRO NEGATIVE whereas S is not SOO electro negative...There happens the repulsive action and so the ANGLE in H2O is more...Hope it helps you..

8.

Why 1chloro 4metylbenzene is major product than 1chloro 2methyl bezene?

Answer» AUSE of the great reactivity of the chlorine radical, abstractions of primary, SECONDARY, and tertiary hydrogen atoms are all exothermic. Therefore, the stability of the product radical has less influence on the activation energy of the reaction. Thus, according to the Hammond postulate, the transition state is more reactant-like. According to R. Brückner Advanced Organic Chemistry, the chlorination of isopentane has four monochlorination products: 22 % 2-chloro-2-methylbutane 33 % 2-chloro-3-methylbutane 30 % 1-chloro-2-methylbutane 15 % 1-chloro-3-methylbutane The statistical factor is responsible for this. If each hydrogen atom of isopentane could be substituted at the same rate, the ratio would be 1 hydrogen atom (8 %) → 2-chloro-2-methylbutane 2 hydrogen atoms (17 %) → 2-chloro-3-methylbutane 6 hydrogen atoms (50 %) → 1-chloro-2-methylbutane 3 hydrogen atoms (25 %) → 1-chloro-3-methylbutane In terms per hydrogen atom, the experimental yield is 22 % / 1 = 22 % → 2-chloro-2-methylbutane 33 % / 2 = 16.5 % → 2-chloro-3-methylbutane 30 % / 6 = 5 % → 1-chloro-2-methylbutane 15 % / 3 = 5 % → 1-chloro-3-methylbutane Thus, 2-chloro-2-methylbutane is indeed slightly preferred –
9.

Why 3 ° amines are less basic than other?

Answer»

alkyl GROUPS donate electrons to the more electronegative NITROGEN. The INDUCTIVE EFFECT makes the electron DENSITY on the alkylamine's nitrogen greater than the nitrogen of ammonium. Correspondingly, primary, secondary, and tertiary alkyl amines are more basic than ammonia.

10.

Methanone and ethanone exist or not

Answer»

no they don't EXIST

11.

Give is acetic acid convert into methlymine

Answer»

H + SOCl2 → CH3-COCl (acetyl CHLORIDE) CH3-COCl + NaN3 → CH3-CO-N3 (acetyl azide) CH3-CO-N3 + HEAT or LIGHT → CH3-CO-N (acetylnitrene — an unstable intermediate) → CH3-NCO (methyl isocyanate) CH3-NCO + H2O→ CH3-NH2 (methylamine) + CO2

12.

Name the salt which produce chloride ions in water sample

Answer» CHLORIDE is the SALT
13.

Why the study or checking chemical and phsical properties of daily used substances or material is essential?

Answer»

ve properties, such as MASS and volume, depend on the amount of matter being MEASURED. Intensive properties, such as density and color, do not depend on the amount of the substance present. PHYSICAL properties can be measured WITHOUT changing a substance's CHEMICAL identity hope so answer will help you

14.

Determine the concentration of KMnO4 solution against standard solution of 0.1M oxalic acid by titration method

Answer»

tion of standard solution of oxalic acid [ 250ml / 0.1M ] we know, molar MASS of oxalic acid ,  = 126g/mol given, molarity = 0.1Mand volume of solution , V = 250mlso, mass of oxalic acid = M × molarity × V/1000= 126 × 0.1 × 250/1000 = 126 × 0.1/4 = 3.15 G now, determination of strength of  using standard solution of oxalic acid. in this titration, potassium permanganate is titrant while oxalic acid is analyte. also we observed that potassium permanganate is oxidising agent. and oxalic acid is reducing agent.The reaction between potassium permanganate and oxalic acid is CARRIED out in an acidic MEDIUM because permanganate ion in the acidic medium is a very strong oxidizing agent. Acidity is introduced by adding dilute sulphuric acid.The CHEMICAL reaction that takes place during titration can be represented by the chemical equation.molecular reaction, -------------------------------------------------------- is overall reaction. ionic reaction, --------------------------------------------------------------- overall ionic redox reaction. from balance chemical equation, it is clear that two mole of potassium permanganate reacts with five moles of oxalic acid. according to molarity concepts , molarity of  × volume of  /molarity of oxalic acid × volume of oxalic acid = mole of /mole of oxalic acid = 2/5 so, molarity of  = molarity of oxalic acid × volume of oxalic acid × 2/volume of  × 5If oxalic acid is to be titrated, add the required amount of dil. sulphuric acid and heat the flask to 60°-70°C. The purpose of heating is to increase the rate of reaction, which otherwise is slow at room temperature.

15.

Plz answer fast what is structural isomers ?

Answer»

ral isomers are FORM of isomerism in which MOLECULES have same molecular FORMULA but different structural formula.This ALSO helps to find out by how MANY ways the bonds can be formed.Hope this helps you Please mark as the brainliest Please

16.

The atomic number of Uranium is 92. How many electrons are there in the neutral atom? How many electrons and protons are there in the ion?

Answer»

no. is the no of p+ in an atom. For any neutral species, no. of p+ = no. of e- So Uranium has 92 e-...... U2+ means that 2 e- has been taken out of the atom so it now has (92 -2) e- that GIVES you 90 e-.[P+ means proton , e- means electrons]Hope this helps

17.

A satellite of mass 'm' is moving round the earth with a speed 'v' state the work done by the force of gravity on satellite. Justify your answer

Answer» RK done by the FORCE of GRAVITY on SATELLITE. Because a perpendicular force ACT on it and
18.

Which of the following processes are accompanied by increase of entropy ? (a) Dissolution of iodine in a solvent. (b) HCl is added to solution to form a ppt. of AgCl. (c) A partition is removed to allow gases to mix. (d) Formation of from and .

Answer»

________________Which of the following PROCESSES are accompanied by INCREASE of entropy ?(a) Dissolution of IODINE in a solvent.(b) HCl is added to solution to FORM a ppt. of AgCl.(c) A PARTITION is removed to allow gases to mix.(d) Formation of from and .✔✔✔_______________________

19.

Hydrogens heat of combustion per unit weight,is about.....times more than of ethanol

Answer»

more than ETHANOL

20.

What are four postulate of werners theory

Answer»

te!! Here is the answer=================Four postulates on Werners theory------------------------------------------------------♢The central metal or the metal atoms in coordination compounds show two types of valency. They are the primary and the SECONDARY valency.♢The primary valency relates to the oxidation state and the secondary valency relates to the coordinate number.♢The number of secondary valences is fixed for EVERY metal atom. It MEANS that the coordination number is fixed.♢The metal atom works TOWARDS satisfying both its primary and secondary valencies. A negative ion satisfies the primary valency. On the other hand, a negative ion or neutral molecules satisfy secondary valencies.

21.

What is humus what is is it important

Answer»

Humus is the topmost fertile layer of the SOIL..Humus is EXTREMELY important to the FERTILITY of SOILS in both a physical and chemical SENSE.

22.

N propyl benzene is best prepared by

Answer» NSWER:- Wurtz-Fittig reactionHOPE IT HELPS
23.

In which year oxygen was found

Answer»

was discovered by Swedish Chemist, CARL WILHELM Scheele in 1772. An English chemist, Joseph Priestly, independently, discovered oxygen in 1774 and published his findings the same year, three years before Scheele published.Hope it helps❤️❤️

24.

in above experiment what will be the maximum rise in temperature of water after melting ice. 27°Cb. 0°Cc. 4°Cd. 100°C

Answer» L be FINE ANSWER
25.

How is ethene prepared ethyl alcohol? Explain marknownikoffs.

Answer»

erted in presence CONCENTRATED SULPHURIC acid it CALLED dehydration reaction

26.

if pressure and absolute temperature of 4 litres of so2 gas are doubled , the volume of this gas would be

Answer»

o, V=nRT/PSo, volume is DIRECTLY proportional to temperature/pressure.When both are DOUBLED, the proportion REMAINS same.Hence, volume doesn't CHANGE.

27.

When ethanol is heated with bleaching powder and water , what are the products?

Answer» ORM(CHCl3) and CALCIUM formate[(HOOC)2Ca] is FORMED
28.

Who is the favourite personality of urs just name

Answer»

a Modi:After putting Gujarat on the world map, Modi built his pan-India appeal and created an image of a decisive leader and an entrepreneur who can pull the nation out of economic woes. The 15th Prime Minister of India is also the second most-followed leader in the world with over six million followers on Twitter. The social media-savvy POLITICIAN became the FIRST to interact with citizens through live chat on the internet. Ranked as the 15th most POWERFUL person in the world by the Forbes magazine, the ‘Development Man of India’ has already created a COMPELLING case for the GLOBAL companies to come and invest in India.

29.

Identify the cation and anion in a given salt A BY PHYSICAL CHARACTERISTIC OF SALT

Answer»

al in A is Cation and the non-metal in A is Anion...As, metals FORM positive IONS which gets liberated at CATHODE and non-metals form negative ions which GET liberated at ANODE.

30.

Esterfication and saponification reaction

Answer»

ication: A PROCESS in which an alcohol and a carboxylic ACID react in the presence of conc. H2SO4 to FORM an ester.Saponification: A process in which an ester reacts with sodium hydroxide to form sodium SALT of an acid and alcohol. An ester reacts in the presence of an acid or a base to give back the alcohol and carboxylic acid.jayz

31.

Calculate the pH of the solution produced when an aqueous solution of pH = 5 is mixed with equal volume of an aqueous solution of pH = 3.

Answer»

r to calculate the pH when two different solutions are MIXED, we need to add the individual moles of X Plus and divide by the TOTAL VOLUME of the two solutions previous in this question it is not possible to TAKE the AVERAGE pH of both the solutions because pH is not additive for example adding two solutions of water each having a pH of 7 will always result in a pH of 7 only. Calculations are as follows,=

32.

The molefraction of a solute is 2.5m aqueous solution is

Answer»

ueous solution CONTAINS 2.5 MOLES of solute in 1000g of water.Number of moles of water =1000/18gmol−1⇒55.55Total number of moles =2.5+55.55⇒58.05Mole FRACTION of solute =2.5/58.05⇒0.043

33.

Give one eg of solid liquid and gaseous for 5 th class

Answer»

your answer. Solid: EG- ice cube, book, etc LIQUID: Eg- water, juice, etcGas: Eg- oxygen that you BREATH, etcHOPE IT HELPS YOU.

34.

Baking powder is mixed with the flour. When water is added to this flour to make dough, baking powderundergoes a chemical reaction during which carbon dioxide gas is produced. This carbon dioxide gas gets trapped into the dough and bubbles out whichcauses the cake to rise making it soft and spongy.

Answer»

your ANSWER:It is absolutely CORRECT. The REACTION that takes PLACE is:NaHCO3 + H+ ———> CO2 + H2O

35.

A white powder is added while baking breads and cakes to make them soft and fluffy. Write the name of the powder? Name its main ingredient. Explain the unction of each ingredient? Write the chemical reaction taking place when the powder is heated during baking.

Answer»

our ANSWER:The white powder which makes the BREAD soft and fluffy is baking soda(NaHCO3). The bread becomes fluffy because when it ACTS with hydrogen it gives out CO2 and H2O. So the CO2 GAS which is released makes the bread soft and fluffy. The baking soda is created when water and CO2 with ammonia is REACTED with NaCl. When powder is heated the following reaction takes place:NaHCO3 (heat) ———> Na2CO3 + H2O + CO2 HOPE IT HELPS YOU.

36.

What is humus? why is it important for soil?

Answer»

- ______________________________DEFINITION: Humus is the ORGANIC matter present in and on the soil. ______________________________IMPORTANCE OF HUMUSHUMUS is important to soil as it adds nutrients to soil which increases it's fertility and allows GROWTH of Healthy PLANTS.Humus is the dead plants, leaves and animals present in the soil.Humus RICH soil makes the plant roots easy to grow by providing them with abundant nutrients, water and oxygen.______________________________

37.

Which transitiion metal does not liberate hydrogen from dilute acids

Answer» ACID HNO3 I THINK it will HELP you
38.

H2so4+2naoh----------->na2so4+2h2o

Answer» ANSWER to your question: This equation is correct and BALANCED...Sulphuric Acid REACTS with Sodium HYDROXIDE to give Sodium SULPHATE and water.Hope it helps ^_^
39.

When electricity passed through an aqueous solution of sodium chloride (brine): NaCl_______ NaOH (aq) +X + Y

Answer»

your answer:When the ELECTRICITY is passed through aqueous solution of sodium chloride the following reaction takes PLACE: NaCl + H2O ---» NaOH + H2 + Cl2So X is H2 and Y is Cl.HOPE IT HELPS YOU.PLEASE MARK AS THE BRAINLIEST.

40.

What is the change in universal indicator of local banana

Answer»

l CHANGE is the change in UNIVERSAL indicator of LOCAL BANANA

41.

Differentiate between Wurtz Reaction and Grignard's Reaction. Please explain with mechanism.

Answer»

Wurtz, is a coupling reaction in organic chemistry, organometallic chemistry and recently inorganic main group polymers, whereby two alkyl halides are reacted with sodium metal in dry ether SOLUTION to FORM a higher alkane: 2R–X + 2Na → R–R + 2Na+XThe CARBON attached to magnesium functions as a nucleophile, attacking the electrophilic carbon atom that is present within the POLAR bond of a carbonyl group. The addition of the Grignard reagent to the carbonyl typically proceeds through a six-membered ring transition STATE.

42.

Why does a piece of burning magnesium ribbon continues to burn in sulphur dioxide ?

Answer»

gnesium is in its METAL form it will burn very EASILY in air. However, in order to start the reaction (theburning) the magnesium metal needs a source of ENERGY. ... When themagnesium metal burns it reacts with oxygen FOUND in the air to formMagnesium OXIDE

43.

just tell me is this statement correct or wrong.....bcs i have a doubt.....if it is wrong then pls correct it....

Answer»

.Here's your answer......Salts are the COMPOUNDS which are FORMED by acid and base in acid  replaced by a metal or other cation.Thanks....!!!XDSorry BABY 'wink'

44.

Name the varieties of coal. State one property each.

Answer»

r TYPES of coal include peat, lignite, bituminous, and anthracite, with anthracite being most desirable due to its high heat content.Peat is the first step in coal formation. Peat is COMPOSED of over 60% organic matter; typically, ferns and VEGETATION found in swamps or bogs. As a result of the high water content of this ENVIRONMENT, peat contains a lot of water, which limits its heat content or the amount of energy it contains. It's a very soft brown coal.Eventually over time, with increasing pressures and temperatures, peat is 'cooked' into coal's next stage, lignite. Lignite is a soft brown coal that still contains a high amount of water. Lignite has a higher heat content than peat but is still not the most desired form of coal. However, lignite makes up almost half of our known coal reserves.Bituminous coal is formed as more pressure is applied to lignite coal. The greater the pressure applied, the more water is expelled, which increases the amount of pure carbon present and increases the heat content of the coal. Bituminous coal is often classified as sub-bituminous or bituminous. The DIFFERENCE is that sub-bituminous is the transition stage from lignite to bituminous coal. Bituminous coal is widely used in the United States and across Europe.Anthracite coal is a metamorphic rock and is considered the highest grade coal. It's hard and dark black in color. It has a very light weight when compared to other forms of coal, as there is very little water present in anthracite. As a result, anthracite has the highest heat content.

45.

How is metalic magnesium obtained from magnesium carbonate ore? write the chemical equations involved.

Answer»

q) + 2NaHCO3(aq) → MGCO3(s) + 2NaCl(aq) + H2O(l) + CO2(G)

46.

Fill in the blanks with correct option it's urgent give me fast

Answer» E here is your ANSWER.......a.butb.ifc.ord.ande.becausef.andg.whenh.wheni.ifj.butPlzzz MARK as BRAINLIEST
47.

Light ray enters from air to glass plate.what is the speed of light in glass if it refractive index is 1.5 ?

Answer» IVE index = 1.5According to laws of refractionRefractive index = SPEED of light in vacuum or air/Speed of light in the medium(GLASS)1.5=3*10^8 / speed in glassSpeed of light in glass =5 *10^7
48.

No. Of electrons present in one milimole of ammonia

Answer»

molecules of AMMONIA in 1 MOLE= 6.022x10^23no. of ATOMS in ONE molecule of ammonia=3+1=4no. of atoms in 1 mole ammonia=(6.022x10^23) x 4=2.4088x10^24

49.

Why diamond is hard in light.

Answer»

is hard because it is MADE up of the 60 carbon atomsPLS MARK AS THE BRAINLIEST

50.

Out of zinc copper iron and manganese in water which is harmful

Answer»

this is U R ANSWERMARK it as BRAINLIEST answerBye