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.

IUPAC name and nomenclature please give the answer ​

Answer»

AlcoholI THINK it may HELP you PLEASE mark me as BRIANLIEST.

2.

Give two examples of photo thermal and electric decomposition​

Answer»

.. here is ur answerplease wait.....thermal DECOMPOSITION: CaCO3 heat = CaO +CO2.electrolytic decomposition: 2h2o ELECTROLYSIS = 2H2 + O2.photo decomposition: AgCl SUNLIGHT = Ag +Cl2hope it helps youMark it as a BRAINLIST and follow me

3.

1.12 dm3 of nitrogen gas and 3.36 dm3 of H2 gas can combine to make 2.24 dm3 of NH3. Write a balanced chemical equation with simple whole numbers by calculating the number of moles from volumes for the given reaction.

Answer»

hello mate. Explanation:Conc.(MOL dm-3) = moles (mol) Volume (dm3) Conc.(g dm-3) = mass (g) Volume (dm3) Page 2 Calculations in Chemistry MOLES A measure of the amount of substance. Number of = mass (m) moles (n) MOLAR mass (Mr) Mass is measured in grams. Molar mass is calculated by ADDING the atomic masses (from the Periodic Table) together.hope you get your answer.. plz follow me follow back will be done.... plz mark as brain LIST answer.. ❤✅

4.

From the given data calculate speed..... Time (secs) Dist. (mtrs) 0. 0 6. 2 12. 4 18. 6 24 8 30. 10 36. 12 ​

Answer»

The FIRST is, of COURSE, 0m/s, and the REST all of the ANSWERS are 3m/s.....

5.

What chemical reaction isperformed by F?​

Answer» EXPLANATION:which  F please give clarity in QUESTION
6.

What is calcination??​

Answer»

AC defines calcination as "HEATING to high temperatures in air or oxygen". However, calcination is also USED to MEAN a THERMAL treatment process in the absence or limited supply of air or oxygen applied to ores and other SOLID materials to bring about a thermal decomposition.itzDopeGirl

7.

What is the mass of glucose in it one litre solution which is isotonic with 6gram of l-1 of urea

Answer»

tion: A solution of glucose (C6H12O6)is ISOTONIC with 4G of urea (NH2-CO-NH2) per litre of solution .The concentration of glucose is :ANSWER Text4g/L8g/L12g/L14g/LAnswer :CSolution :Isotonic solution has same conc.π1=π2C1=C2n1=n2W1M1=W2M2So,x180=460⇒x=12ghope help you PLEASE FOLLOW meMark has brainlist

8.

5. Explain the following phenomena we observe in our everyday life, with the help of particle theory: (i) A gas fills the entire vessel in which it is kept. (ii) We can easily move our hand through air, but to do the same in a solid block of wood, we need to learn the special karate skills. (iii) We get the fragrance of the flowers from a bouquet kept in a far-away corner of the room.

Answer»

(i) The force of attraction between particles of gas is negligible. Because of this, particles of gas move in all directions. Thus, a gas fills the VESSEL completely in which it is kept.(ii) We can move our hands freely in air as its particles have a large inter molecular SPACE. Wherein wood, the particles are tightly PACKED together and doesn’t allow free movement unlike air. Thus, we need special karate training to use a certain right amount of force.(iii) We are able to sense the fragrance of a flower bouquet EVEN from a far corner as, its scent TRAVELS in the thin particle of air and through our nose. Explanation:

9.

Why wooden table is said to be solid?

Answer»

Because it is not LIQUID or GAS so it SAID SOLID

10.

20mL of acetone is added into water to make total volume of 250mL. The percentage by volume of acetone in this solution is:

Answer» 8%EXPLANATION:VOLUME of ACETONE =20mlVolume of SOLUTION =250mlV/V%=20/250×100=8%
11.

You are provided with three solutions of sodium hydrochloric acid and sodium chloride and phenolphthalein is given .find the acid, base and salt

Answer»

acid hydrochloric acid phenopthalein got no color, base NaOH PINK COLOUR, salt NACL gets pink due to BASIC nature of Na

12.

Balance the equation Pb+Cucl2_x+y​

Answer»

Pb+CuCl2----->PbCl2+Cu this is an DISPLACEMENT reactionExplanation:

13.

During photosynthesis, the oxygen gas comes from​

Answer»

hloo....The oxygen released during photosynthesis COMES from the splitting of WATER during the light-dependent reaction. Remember, the ELECTRONS lost from the reaction center in photosystem II (Protein complex, located in the THYLAKOID membrane) must be replaced......please mark as BRAINLIST...

14.

What is chemical reactions and types​

Answer»

This is the ANSWER for this QUESTION.

15.

By observing your own locality , identity some unethical work of human being which is responsible for air pollution​

Answer»

There are many things done by humans which cause AIR pollution1:TOXIC FUMES given by vehicles2:burning of PLASTICS and other materials3:smoke given out by factories

16.

Balance the equation Fe2o3+C_a+b​

Answer»

-a+bbalanced ---fe+co2

17.

How many different protons are present in allyl iodide

Answer»

If the proton has two TYPES of neighboring protons then NUMBER of lines is equal to ( n1 + 1) (N2 + 1). For example in 3-bromopropne hope this HELPS MARK as brainliest follow me

18.

What is Addisions disease?​

Answer»

hey MATE here is your answer EXPLANATION:HOPE it's helpful THANK me follow me mark me as a BRAINLIEST

19.

What is the definition of - a. Solid b. Liquid c. Gas

Answer»

A SOLID has definite VOLUME and shape, a liquid has a definite volume but no definite shape, and a gas has NEITHER a definite volume nor shape.Hope u will like ANSWER

20.

2SO2(g) + O2(g) ⇔ 2SO3(g) How many molecules of oxygen react with 1.2 × 10-2 moles of sulphur dioxide to produce sulphur trioxide? plsss

Answer»

+ O2(g) ⇔ 2SO3(g)How MANY MOLECULES of oxygen react with 1.2 × 10-2 moles of sulphur DIOXIDE to producesulphur trioxide?2 × S + 2 × O = 2×16 +2× 6. = 32+12 =44= 1.2 × 10-² /44= 0.0028 × 10-²

21.

Define sublimation with example​

Answer»

Sublimation is a type of phase transition, or a CHANGE in a state of matter, just like melting, FREEZING, and evaporation. Through sublimation, a SUBSTANCE changes from a solid to a gas without ever passing through a LIQUID phase. Dry ice, solid CO2, provides a COMMON example of sublimation.

22.

What happens when copper is added to lead chloride solution

Answer» DISPLACEMENT REACTION occurs and solid COPPER is formedhope its help you
23.

Examples for combination reaction with their balanced equations

Answer»

hey MATE here is Ur answerex : 2H2+O2=2H2Ohope it HELPS uplzz MARK me as brainliest

24.

Which of the following species are isoelectronic ?Al3+, F, Cl- , O2- , Na , Mg2+

Answer» EXPLANATION:ISOELECTRONIC AL3+,MG2+,O2-
25.

So2 + o2 ----> so3 balance

Answer»

Here's your answer MATE EXPLANATION:Refer to the attached picture for ur answer....HOPE IT HELPS. PLS MARK ME BRAINLIEST ☺️ AND FOLLOW ME...

26.

1. For the gaseous reaction: H+Clx 2HCHIf 40 ml of hydrogen completely reacts with chlorme then find out therequired volume of chlorine and volume of produced HCLCl2 (ml)HC1(ml)(a) 1020(b) 303040(c) 40(d) 4080.please explain​

Answer»

For the gaseous reaction,. If 40 ml of hydrogen completely reacts with chlorine then FIND out the the required VOLUME of chlorine and volume of produced of HCl?Explanation:Hope it would HELP you. And please MARK it as brainliest and please follow me.

27.

Properties of alkaline earth metals that increases with their atomic number is * A. ionization energy B. electronegativity C. Electron affinity D. NONE

Answer»

electronegativeExplanation:This tend to increase the solubility and to OVERCOME the counter-effect produced by DECREASE in hydration energy. Hence the solubility of alkaline earth metal HYDROXIDES increases with increase in atomic number. Whereas ELECTRONEGATIVITY, Solubility of their SULPHATES and IE decreases with increase in atomic number.

28.

H2 + cl2 ------> Hcl balance.

Answer»

H2+Cl2--------2HCLExplanation:PLEASE MARK as BRAINILIST

29.

4. Name the phenomena involved in each of the following: (i) Rain forms from clouds (ii) Water level in the lakes become lesser in hot summer days (iii) Salt disappears when stirred in water (iv) Ice cream is taken out of the refrigerator during summer (v) Carbonated drink is kept in the freezer (vi) Solid iodine crystals become violet fumes on heating

Answer» FOLLOW me :-D and PLS mark my answer brainliest (i) condensation(ii) evaporation(iii) DISSOLVING(iv) melting(v) carbonated drinks cant be KEPT in freezer. Correct your question. (vi) sublimation
30.

What is the physical state of water at 400°c? explain with reason.​

Answer»

s your answer is here...The PHYSICAL state of water at 400°c is vapour state because the B. P. ( BOILING Point) of wate RIS 100°c and 400° c is very high temp. at which the water become vapour phase. pls mark as BRAINLIEST if helpful

31.

The pyrimidine bases present in DNA are

Answer» THYMINE, CYTOSINE is the ANSWER
32.

Fe + cl2 ------> fecl3 balance.

Answer» FE + CL2------->fecl32Fe +3 cl2-------->2fecl3Explanation:hope it helpss MARK it as brainlist please thanku !!
33.

Is boric acid a protic acid? Explain.​

Answer» CID is a weak monobasic acid which BEHAVES as a Lewis acid. So, it is not a protic acid.B(OH)3 + 2HOH → [B(OH)4]- + H3O +It behaves as an acid by ACCEPTING a PAIR of electrons from –OH ion.
34.

Halogen test dilute hcl q use krte h​

Answer»

Because Hcl is one of the STRONGEST inorganic acid and that's why TENDS to lose Hydrogen EASILY I hope it'll help you....MARK my ANSWER as brainliest

35.

Which of the following solvents has largest value of Kf? 1) Water 2) Benzene 3) Camphor 4) Hexane

Answer»

gest value of KF from the following solvents is of:(3) CAMPHOR- Water has a Kf value of about 1.86 K kg / mole- BENZENE has a Kf value of about 5.12 K kg / mole- Camphor has a Kf value of about 40 K kg / mole- Hexane has a Kf value of about 20 K kg / mole- Hence, camphor has the highest value of Kf AMONG the following.

36.

What happens when Feso4 crystals are heated​

Answer»

it GETS hotExplanation:

37.

Write the Symbols for the following elements. a) Sodiumb) Magnesium c) Potassium d) Calcium​

Answer» SODIUM- NaMagnesium - MgPotassium - kCalcium -clHope it HELPS
38.

what do you under by the term periodicity? Are the properties of elements placed in group same? Explain?​

Answer»

When the elements are arranged in order of increasing atomic NUMBERS, elements with similar chemical properties are repeated at definite intervals. This is KNOWN as periodicity. yes, this periodicity is due to the periodicity in the number of ELECTRONS in the outermost shell of the atoms of the elements. If elements having the same number of valence electrons are GROUPED together, the elements falling within each group are similar in chemical properties. Explanation:thank you

39.

Apply Lechatelier’s principle in getting the maximum yield of sulphur trioxide and their effect on the economics of the process.

Answer»

I DINT UNDERSTAND ANYTHING

40.

Of the quantum number n has value of 3 , what are permilled values of quantum no. l​

Answer» L can have values 2,1,0 CONSIDER if N is the preinciple QUANTUM numbers then l can have valuesn-1Explanation:
41.

A piece of chalk can be broken down into small pieces by hammering but a piece of iron cannot be broken into small particles by hammering. Explain.

Answer»

BECAUSE THE PARTICLES OF CHALK OF THEIR BOND OF ATOMS IS VERY WEAK DUE TO WHICHE CHALK IS LITTLE WEAKER THA IRON.

42.

How to write introduction to a chemistry project​

Answer»

Explanation:As with most DISCIPLINES, the introduction should include your background knowledge of the EXPERIMENT, including theory and past RESEARCH, the relevance of your research, and the THESIS statement.

43.

For hydrogen atom the energy of fifth shell is -x, what will be the value of E 3and E9, for li ++ ions​

Answer»

History of biofuel cellThe statement “Perhaps the most refined fuel cell system today is the human body, a mechanism that catalytically BURNS food (fuel) in an electrolyte to produce energy, some of which is electrical” highlights the connection between living organisms and electricity [1, 2]. With an experiment conducted USING frog leg, Biologist Lugi Galvani in 1780’s proved that electrical energy and biology have a close connection to each other [3]. Michael Cresse Potter, a Botany professor also demonstrated that living organisms can generate voltage and deliver current [4].The term “fuel cell” has been in use for over a century. Despite some uncertainty about who first fabricated one, credits of designing and experimenting with first fuel cells go to both Sir William Grove (1839) and the Swiss scientist Christian F. Shoenbein (1868). In early 19th century, different organisms LIKE bacteria, algae, and yeast were considered for this research. With the advent of space race, considerable attention was given to energy GENERATION from recycled waste which in turn ignited interest in microbial fuel cell research. Later, during the sixties and in the early seventies, fuel cell related research accelerated as a consequence of increase in oil prices and has sustained momentum to date. [5, 6]. The time lines of fuel cell development are shown in the Fig.1.Figure 1.The time line of fuel cell development [7]1.2. Types of fuel cellsFuel cells could be broadly categorized into abiotic fuel cells of which the fuel cell components do not comprise any biological material and biotic or biological fuel cells which comprises living organisms or biological material (such as enzymes or derivatives). The primary types of abiotic fuel cells grouped according to the electrolyte used are shown in Table 1.Type FeaturesAlkaline fuel cells (AFC) Uses KOH as the electrolyte and electro-catalysts such as Ni, Ag and metal oxidesPolymer electrolyte membrane fuel cells(PEMFC) Uses a proton conductive polymer membrane as the electrolyte and Pt as the catalystPhosphoric acid fuel cells (PAFC) Uses concentrated phosphoric acid as the electrolyte and Pt as the catalystMolten carbonate fuel cells (MCFC) Has a combination of alkali metals (Li, K, or Na )Solid oxide fuel cells (SOFC) Uses non-porous metal oxide(s) as the electrolyteTable 1.Different types of commonly known inorganic fuel cells [7].The biological fuel cell (BFC) can be categorized into two main areas:Microbial fuel cells (MFC)Enzymatic fuel cells (EFC)The biological fuel cells (BFC) use enzymes or microorganisms as catalysts. In a microbial fuel cell, the oxidation reactions that are catalyzed by microbes; alternatively, when the catalyst is an enzyme, the cell is called as an enzymatic fuel cell. While both microorganisms and enzymes catalyze oxidative reactions that takes place at the anode, only enzymes (sometime coupled with inorganic catalysts) are used in the cathode. Biological fuel cells utilize organic substrates (such as sugars and alcohols) and operate at mild temperature environments where biological activity is optimal. For example, the catalyst used in a microbial fuel cell could simply be an organism like Baker’s yeast that feed on simple sugars or an advanced species like R. ferrireducens [8-10] that THRIVE on more complex substrates.1.3. Different categories of microbial fuel cellsVarious types of MFC designs have been developed of which five main categories are common:Uncoupled bioreactor MFC: a separate compartment where organisms produce the hydrogen (fuel) and that hydrogen is fed into a hydrogen fuel cell.Integrated bioreactor MFC: hydrogen fuel production and the electricity generation both take place in the same chamber.MFC with mediated electron transfer: where intermediate molecules shuttle electrons from microbial cells to the electrode.MFC with direct electron transfer: where electron transfer to the electrode take place without the presence of any mediator molecules.C6H12O6+Mediator(o)  →  Product+Mediator(r)E1Mediator(r) →  Mediator(o)+Electrons E2

44.

Write a short essay of covalent solids?

Answer»

tion:COVALENT bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.[1][2] For MANY molecules, the sharing of electrons allows each atom to attain the equivalent of a full outer shell, corresponding to a stable ELECTRONIC configuration. In organic chemistry, covalent BONDS are much more common than ionic bonds.

45.

How can we liquefy air?

Answer»

The liquefaction of AIR is used to obtain NITROGEN, OXYGEN, and argon and other atmospheric noble gases by separating the air components by fractional DISTILLATION in a cryogenic air SEPARATION unit.

46.

What is thhe for the given question​

Answer» C. HI have maximum vapour pressure.Explanation:becouse it have very WEAK hydrogen bonding.
47.

Define oxidation process with one example? ​

Answer» UGH the above ATTACHMENT hope it helps you and mark as brainliest...KEEP SMILING:)
48.

Answer it fastly it is my sister Anaya work​

Answer»

Q1] aQ2] BEXPLANATION:PLEASE mark me as the brainliest and FOLLOW me...

49.

On the basis of above experiment write the main features of   atomic model.​

Answer» TION:Which EXPERIMENT.....?????
50.

What happens when dilute HCl and dilute NaOH is mixed equally​

Answer»

ual VOLUMES of hydrochloric acid (strong acid) and SODIUM hydroxide (strong BASE) SOLUTION of same CONCENTRATION are mixed, the result is salt and water.Hope it helps :)