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.

Carbon compounds are poor conductors of electricity.why?

Answer» COMPOUNDS are POOR conductor of electricity because if a compound is made up of one or two COVALENT bonds then they are poor Conductor of electricity.
2.

What is the difference between valency and oxidation number.

Answer»

number of BONDS which can be formed in an atomoxidation NUMBERTHE MEASURE of degree of oxidaton of an atom in a SUBSTANCE

3.

NCERT VIII - Sciences What happens when iron nails are placed in copper sulphate solution? Write word equations of the reactions involved.

Answer»

on nails are placed in copper sulphate solution, the blue colour of copper sulphate solution BECOME light and turns into light GREEN  because IRON displaces copper from copper sulphate solution. this is caled DISPLACMENT reactionCopper sulphate + Iron → Iron sulphate + CopperCuSO4 + Fe --> FESO4 + Cu

4.

Write the balanced chemical equation for the following reactions. 1. Preparation of carbon dioxide in the laboratory.2. Thermal decomposition of limestone.3. Decomposition of magnesium nitrate.4. Reaction of sodium with oxygen.5. Thermal decomposition of lead IV oxide.6. Formation of ammonium chloride.7. Reaction of potassium iodide and lead nitrate solution.8. Reaction of iron nail with copper sulphate solution.9. Combustion of methane gas.10. Reaction of carbon dioxide with lime water.11. Formation of ammonia.12. Thermal decomposition of aluminium hydroxide.​

Answer»

1) Answer-CaCO3+2HCl→CaCl2+H2O+CO22) Answer-Calcium carbonate 3) Answer-Since magnesium NITRATE has a high AFFINITY for water, heating the hexahydrate does not result in the dehydration of the salt, but rather its decomposition into magnesium oxide, oxygen, and nitrogen oxides: 2 Mg(NO3)2 → 2 MgO + 4 NO2 + O2.4) Answer-Sodium reacts with oxygen to form sodium oxide and has the following balanced chemical EQUATION: 4 NA + O2 --> 2 Na2O.5) Answer-PbO2 = PbO + O2 | Chemical reaction and equation.6) Answer- 8NH3(Express)+3Cl2→N2+6NH4Cl.7) Answer- Lead II Nitrate Reaction With Potassium Iodide - Pb(NO3)2 + KI.8) Answer-The reaction for this experiment is Fe(s) + CuSO4(aq) FeSO4(aq) + Cu(s). In this reaction we will be reacting 2.24 g of Fe with 8.00 g of CuSO4 to form Cu.9) Answer-CH4(g)+2O2(g)→CO2(g)+2H2O(g).10) Answer- Resultant carbon dioxide passed through limewater in the right tube, producing a milky solution due to precipitation of the insoluble suspension of calcium carbonate: Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O.11) Answer-The balanced chemical equation for the formation of AMMONIA gas by the reaction between nitrogen gas an hydrogen gas is given. N2+3H2→2NH3. 12) Answer-2 Al (OH) ₃ → Al₂O₃ + 3 H₂O.

5.

Define Photosynthesis ?______Iska matlab kya h I think paisa bolna chahta h tu ??​

Answer»

nthesis, the PROCESS by which green plants and certain other ORGANISMS transform light energy into chemical energy. ... During photosynthesis in green plants, light energy is captured and used to convert WATER, carbon dioxide, and minerals into OXYGEN and energy-rich ORGANIC compounds.Kuch na...faltu joke...ignore kar (^~^;)ゞ

6.

1. According to molecular orbital theory, bond orderfor Cl2 ion is​

Answer»

Bond order will be one because CHLORINE clearly have 1 VALANCE electron and it will form bond with other electron of another chlorine. hence, bond order is 1

7.

Base present in milk of magnesia is known as_______.​

Answer»

Magnesium hydroxideExplanation:Magnesium hydroxide is the BASE present in milk of magnesia. It is used to neutralise the EXCESS acid present in stomach and is HENCE used as an antacid.Keep SMILING!PLEASE mark me as Brainliest.

8.

What is Chemistry??Anyone here....??​

Answer»

Ʀ ╚»★«╝ CHEMISTRY is the SCIENTIFIC discipline involved with elements and compounds composed of atoms, MOLECULES and ions: their composition, STRUCTURE, properties, behavior and the CHANGES they undergo during a reaction with other substances. ╚»★«╝Ɨ ₳Ⲙ ĦɆɌɆ ❤ĦØ₱Ɇ ₮ĦƗ$ ĦɆⱠ₱ ¥ØɄ

9.

What is human resources ​

Answer»

here your ANSWER here your answer

10.

The term atomicity represents * 1 pointA) number of atom in a moleculeB) number of molecule in a compoundC) amount of particle in a compoundD) number of moles in a sample​

Answer»

B) NUMBER of MOLECULE in a compound ■Explanation:■ Plaese MARK as brainliests ■

11.

Beo is insoluble but baso4 is soluble?​

Answer»

beo is a covalent COMPOUND and BASO4 is IONIC compound.But in which it is insoluble or soluble it is not mentioned

12.

What is the method of filteration

Answer»

here is your answerExplanation:HOPE it's HELPFUL U thanku have a great daydear❤️

13.

Can the transition temperature of high-temperature superconductors be brought up to room temperature? What are the chemical consequences of having an element with an atomic number above 137, whose 1s electrons must travel faster than the speed of light? Is Neutronium-4 possible?​

Answer»

I can't ANSWER because I don't KNOW answer DEAR so SORRY

14.

2x,3y,5a,?,17m find ?​

Answer»

9eExplanation:2=b,b+3=next LETTER X(in BACK WORDS)

15.

What is meant by propeller twist in DNA?

Answer»

tion:Each base is planar, but when two BASES pair, they do not always LINE up PERFECTLY flat with each other; this angle is CALLED PROPELLER twist because the bases are twisted away from each other like an aeroplane propeller.

16.

आयुर्वेद के पिता किसे कहा जाता है​

Answer»

आयुर्वेद के जनक हैं भगवान धन्वन्तरि

17.

Depressioniscaused by lack of which vitamin?​

Answer»

b 8s the VITAMIN which CAUSE depression which is to my FRIEND PRASAD gondhali

18.

Calculate the effective nuclear charge on a 3p electrons in chlorine. I need calculation not a definition ​

Answer»

Explanation:Effective nuclear charge” is a concept that helps to understand how strongly the outer-shell electrons are held by the atom. It wants you to think of the nucleus plus all the non-outer-shell electrons as a single body, with the outer-shell electrons outside. The charge on that body is the effective nuclear charge. The inner electron shells are essentially shielding the outer shell from “feeling” the full charge of the nucleus. The value is obtained adding the charges on the nucleus and all the non-outer-shell electrons. So a chlorine atom, ATOMIC number 17: The nucleus has a charge of +17 The electron CONFIGURATION is 1s2 2s2 2p6 3s2 3p5. The outer shell is #3. If you count all the other electrons (in shells #1 and #2), you find 10. Ten electrons have a combined charge of -10. So the effective nuclear charge = +17 + (-10) = +7. You’ll get the same answer if you simply count (not charge) the number of electrons in the outer shell. For Cl, that would be the 3s2 3p5: 2 + 5 = 7. If it’s not immediately obvious why that is true, think about it and try to work it out. It will help your overall understanding of atomic structure and periodic PROPERTIES.

19.

Give suitable example of bingham fluid in hindi or Gujarati?!!​

Answer»

बिंघम प्लास्टिक तरल पदार्थों के उदाहरण: टूथपेस्ट, मेयोनेज़, चॉकलेट, सरसों। ये तरल पदार्थ प्रवाह करने से पहले एक बल की आवश्यकता होती है। उनकी चिपचिपाहट लागू बल के आधार पर परिवर्तित नहीं होती है, या तनाव की मात्रा जितनी अधिक होती है। EXPLANATION:Hope this helps you if do pls mark me as a BRAINLEST and GIVE me 500 POINTS pls

20.

7.Comel AldacuchYAHCNB on ​

Answer»

ye aap kya kehe rahe ho aace SE TYPE kaeo

21.

(d) bromine cannot be heavier than air because it is going 64. When a gas jar containing colourless air is kept upside down over a gas jar full of brown-coloured brominevapour, then after some time, the brown colour of bromine vapour spreads into the upper gas jar makingboth the gas jars appear brown in colour. Which of the following conclusion obtained from these observationsis incorrect?(a) bromine vapour is made of tiny particles which are moving(b) air is made up of tiny particles which are moving(c) the particles of bromine are moving but those of air are not moving(d) even though bromine vapour is heavier than air, it can move up against gravityThe following statements is not true ?​

Answer» LOWING STATEMENT are TRUE
22.

Find the pressure exerted by mixture of 4.4 g of CO2 and 1.6 g of CH4 at 1atm pressure and 295K in 2L vessel.​

Answer»

The NUMBER of moles of methane is 163.2 =0.2.The pressure exerted by methane is P= VNRT = 9×10 −3 0.2×8.314×300 =5.54×10 4 Pa.The number of moles of CO 2 is 444.4 =0.1.The pressure exerted by CO 2 is P ′ = Vn ′ RT = 9×10 −3 0.1×8.314×300 =2.77×10 4 Pa.The total pressure is P+P ′ =5.54×10 4 Pa+2.77×10 4 Pa=8.31×10 4 Pa.

23.

In which state is sulphur at 200 degrees celcius

Answer»

in MOLTEN STATE SULFUR is 200 degree celsius

24.

Calculate the molality of the following solution containing 182.5g of HCl in 800g of H20 When do you use molality rather than molarity? Explain why? ………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..

Answer»

>182.5 g of HCL is present in 800 g of H2O.=>182.5 g of HCl is present in 800/1000 kg => 0.8 kg of H2O.We KNOW that,Molar mass of HCl = 1 + 35.5 => 36.5 grams per mole.Molality = (moles of solute) / (kilograms of solvent)To find,Number of moles in 182.5 grams of HCl = 182.5/36.5 => 5 moles of HCl.Molality = 5 moles of HCl/0.8 kilograms of WATER =>50/8=>25/4 =>6.25 Hence, the molality of the solution is 6.25 mol kg-1 .Question: When do you use molality rather than molarity? Explain why?Answer: When doing calculations involving vapour pressure and changes in temperatures molality is generally used and not molarity.This is because molality is moles of solute per kilograms of solvent, the mass of the solvent remains constant and does not CHANGE EVEN with changes in temperature, but, the volume of a solution varies slightly with increase or decrease in temperature, hence in such cases molarity cannot be used and molality is preferred for accurate calculation.In titrations and other analysis at fixed temperature and pressure conditions, molarity and normality can easily be put to use.

25.

Metals like magnesium, zinc and iron on heating react with steam to form hydrogengas and their respective(a) hydroxides (b) oxides(c) hydrides(d) none of these​

Answer»

Metal OXIDES ( b )Explanation:They react with STEAM to FORM metal oxides and hydrogen GAS.

26.

What is cleavage plan ? give an example .why is cleavage an isotropic property?​

Answer»

tion: Properties of a material depend on the direction; for example, wood. In a piece of wood, you can see lines going in one direction; this direction is referred to as "with the grain". ... Strength is a property of the wood and this property depends on the direction; thus it is anisotropic.The cleavage planes are areas where the crystal structure is the weakest. It is only along these planes that a crystalline solid can be cut. Therefore, a cut from a sharp object would give two smooth PARTS. Amorphous solids do not show any cleavage planes.Anisotropy is the property of substances to exhibit variations in physical properties along DIFFERENT molecular axes. ... This leads to different physical and mechanical properties in a single crystal along the different axes: examples are different electrical and thermal conductivity and light polarization.Cleavage forms parallel to crystallographic planes:Basal or pinacoidal cleavage occurs when there is only one cleavage plane. ...Cubic cleavage occurs when there are three cleavage planes intersecting at 90 degrees. ...Octahedral cleavage occurs when there are four cleavage planes in a crystal.How do you identify cleavage?If the crystal splits cleanly and SMOOTHLY along a flat plane the break is called cleavage. If the break does not show flat planes, we simply call it fracture.

27.

Chettaa, focus it, ithu correct aano ​

Answer» QUESTION says dimethyl amine is a secondary amine but that doesn't mean it's another NAME is secondary amine.Doubt illaann paranjath oru doubtum illaannalla ttoEnik oru friend UND, doubt undenki Avalod chodhikkalaanu, AVAL ente same batchil aanuda
28.

K, = 2 x 10's +B7. If, Ak, = 6 x 10'sС%B in the product is(1) 25%(3) 75%(2) 50%(4) 80%​

Answer»

80Explanation:MAKE me BRAINLIST PLZ plz

29.

a large crystal of potassium manganate (VII) was placed in the bottom of a beaker of cold water and left for several hours explain your answers using the idea of particles.

Answer» ANSWER EXPERT VerifiedThis is DUE to diffusion of the KMnO₄ particles in the WATER.
30.

How does the existence of isotopes contradict Dalton atomic theory ???​

Answer»

I hope it will HELP youExplanation:Isotopes are the DIFFERENT forms of an element which has same NUMBER of electron and proton but different number of neutron hence it differs in mass. ... It contradicts the Dalton's theory as the theory stated that , all ATOMS of a given element are IDENTICAL in mass and properties.

31.

With the help of an activity, shows that hydrogen gas is combustible. ​

Answer» PURE hydrogen BURNS with OXYGEN with non-luminous blue flame with unique pop sound. The reaction is EXOTHERMIC. ... A mixture of hydrogen and oxygen on ignition produces explosion. This shows that hydrogen is a combustible gas.
32.

Using a suitable example , discuss mannich reaction and provide a suitable machanism​

Answer»

Pharamaceutical drugs.Explanation:The Mannich reaction is used in the synthesis of MANY pharmaceutical drugs. ONE such example is the USE of this reaction in the production of fluoxetine, a powerful antidepressant. The nonsteroidal anti-inflammatory drug tolmetin is SYNTHESIZED with the help of this reaction.Hope it help youHere is Avni, Hellopls mark my ANSWER brainliest.

33.

Give reason:- ice is solid at 0 degree celcius and water is liquid at room temperature

Answer» WATER is a liquid at ROOM temperature due to the PRESENCE of HYDROGEN bonds between water molecules. The state of a MOLECULE is determined by intermolecular forces.
34.

Predict how chemical reactivity is affected by decrease effective nuclear charge​

Answer»

Increasing REACTIVITY (easier to lose electron) Reactivity increases with the NUMBER of shells shielding the electrons in the outer (VALENCE) shell. The PERIODIC trends in the electron affinity parallel to those in the ionization energy of the elements. increases for same shell) from left to RIGHT across a period.Explanation:Hope it helps you ✌️✌️

35.

An organic compound contained C 66.7%, H 11.1%, 0 22.2% by mass. Its relative formula mass was 72. Find: a) the empirical formula of the compound b) the molecular formula of the compound. (Ar : H = 1, C = 12, 0 = 16)

Answer»

Find the area of a rectangular field in hectare WHOSE SIDES are: 70 m 9DM and 125m

36.

In the figurefjkcgljjk​

Answer»

njhbhvhhubjkkhuhjbubjhiin

37.

Study of various media and techniques to the extent of their availability ​

Answer» MARK me as the BRAINLIEST..
38.

Different between surface and interfacial tension?

Answer»

Hope it will help u Explanation:In SHORT; SURFACE tension is the property of the liquid in contact with gas phase (usually air). Interfacial tension, on the other hand, is the property between any TWO substances. ... Surface and interfacial tension are usually presented by the symbol σ and it is MEASURED by force PER unit length.

39.

What is meant by combustion ?​

Answer»

ion, a chemical reaction between substances, usually INCLUDING oxygen and usually ACCOMPANIED by the GENERATION of heat and light in the form of FLAME.

40.

how i write project on the study the method of purification of water in project form like Aim, requirement, procedure, observation table, etc.​

Answer»

I don't KNOW SORRY LET me ASK CARRYMINATI

41.

25. Annual Value of self occupied house will be: (A) Municipal Valuation(B) Fair Rental value(C) Nil(D) Municipal Valuation or Fair Rental value which ever is higher​

Answer» TION:✳Answer✳✳↕️↕️↕️✳✳(B) FAIR RENTAL value✳
42.

How to derive lamda = h/root 2em from lamda = h/mv​

Answer»

Good MORNING : How are you. Have a NICE DAY ahead✌can you send PICTURE of your question because i CANT clearly understand your question here

43.

How many sticks are there??a) 3 sticksb) 4 sticksc) bothd) none​​

Answer»

the ANSWER is threeit is 3

44.

How will distinguish between calcium carbonate and sodium carbonate on the basis of flame test ​

Answer»

Sodium carbonate has a higher pH than calcium carbonate and is more soluble. It's COMMONLY known as SODA ash. Calcium carbonate occurs naturally in chalk, marble and limestone.Sodium chloride, POTASSIUM chloride and calcium chloride will distinguish by using the flame test. Sodium chloride obtained yellow flame, Potassium chloride obtained violet flame, calcium chloride obtained Brick RED flame.PLEASE MARK AS BRAINLIEST PLEASE FOLLOW MY BRAINLY ACCOUNT

45.

Calculate the pH when 1 mmol of HCl is dissolved in 5 mmol of CH3COOH and 4 mmol of CH3COO-solution, the volume of the solution is 20 mL. Ka for CH3COOH is 10-5 * O 5 04.69 0 4.2 0 4.3

Answer»

-4.2Explanation:MARK it as BRAINLIEST

46.

An aqueous solution is prepared by diluting 3.30 mL acetone (density = 0.789 g/mL) with water to a final volume of 75.0 mL. The density of the solution is 0.993 g/mL. What is the molarity, molality and mole fraction of acetone in this solution?

Answer»

0.98 g/ mlExplanation:HOPE you understand PLEASE mark your ANSWER as BRAINLIST

47.

How would you obtain ethanol from ethyne

Answer» CONVERT ETHYNE to ethane by USING (LiAlH4 or NA + C2h5oh or H2/Ni) then react with Cl (1 mole) to get ethyl CHLORIDE and then use aqueous KOH to get the ethanol as product.
48.

What is meant by eutrophication ?​

Answer»

ication, the gradual increase in the concentration of phosphorus, NITROGEN, and other plant nutrients in an aging aquatic ecosystem such as a LAKE. The productivity or fertility of such an ecosystem naturally INCREASES as the amount of ORGANIC material that can be broken down into nutrients increases.

49.

What is Foam ?pls be fast​

Answer»

an object FORMED by trapping pockets of gas in a LIQUID or SOLID. A bath sponge and the HEAD on a glass of beer are EXAMPLES of foams. In most foams, the volume of gas is large, with thin films of liquid or solid separating the regions of gas. Soap foams are also known as suds.

50.

Write the syntax of the following question line​

Answer»

bhedi DIGRESS dg have any questions i'm not let us everyone should probably going BACK from my mom dad told tomorrow please let us them up into your TOWN SOUTH london ontario california please feel FREE guilty about how are going doing something about being blocked your artery and was going ableExplanation:jjplease jehjwyegehwowpwk