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.

14. Fullerene is an allotrope of which atom?A)BINC) OD) All​

Answer»

ANSWER:

only MADE up of CARBON ATOMS

2.

14. Fullerene is an allotrope of which atom?A)B)NC) 0D) All​

Answer»

Answer:

fullerene is an ALLOTROPE of carbon atom...

EXPLANATION:

HOPE YOU FOUND UR ANSWER... :)

3.

Example 1:Why is hydrogen placed in the metal reactivity series, though it is not a metal?​

Answer»

Answer:

For EXAMPLE, zinc is above hydrogenso it can't be DISPLACED because it is more reactive. HYDROGEN is included in the reactivity series of metals because it's property of electroposivity (i.e losing ELECTRON to form positive ion) is similar to that of metals, THATS why we can relate it with metals.

4.

An aqueous solution of a substance 'P' is used in white washing. Name the substance 'P' and write its chemical equation for the reaction of substances 'P' with water.

Answer»

ANSWER:

the SUBSTANCE which is used for white washing is calcium OXIDE CAO

Explanation:

CaO +H2O = CA(OH)2

5.

Calculate the molecular weights of the following molecules 1.Carbondioxide 2.Carbonmonoxide 3.Nitrogendioxide​

Answer»

Answer:

1. CO₂= 44 gm/mol

2. CO= 28 gm/mol

3. NO₂= 46 gm/mol

6.

12. Carbolic Acid contains which functional group?A) COORB) RORC) OHD) COOH​

Answer»

✴OLA!!✴

Option (d ) COOH is the ANSWER ✔✔

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7.

13. Apple contains which acid?A) Tartaric acidB) Citric Acid©) Malic acidD) None​

Answer»

C) Malic ACID is your ANSWER

8.

3. Which has greater density OUT W4. Tivo molecules of a solid are kept some distance apart and the force betweenmeasured. The solid is then melted to form a liquid, Two molecules of the tekept the same distance apart and the force between them is measured. Whicgreater? Explain why​

Answer»

EXPLANATION:

Gaksosjshgahskosishgss

9.

Write the equation for preparation of Oxygen , by heating potassium chlorate​

Answer»

Explanation:

The reaction EQUATION is 2KClO3 = KCl + KClO+O2↑ This reaction needs to be heated in contact with a CATALYST, typically manganese (IV) DIOXIDE (MnO2). ... here is more INFORMATION about POTASSIUM chlorate.

10.

Write the empirical formula of c6H12o6 and ch3oH​

Answer»

Answer:

1:2:1 and CH3OH 8 don't KNOW

11.

Active molecule present in green tea that is a phenolic compound

Answer»

Explanation:

Green tea CONTAINS six primary catechin compounds NAMELY catechin, gallocatechin, epicatechin, epigallocatechin, epicatechin gallate and epigallocatechin gallate (EGCG), the LATER being the most active component. The polyphenols content of green tea and black tea varies from 30% to 40% and 3% to 10%, respectively.

12.

Barium chloride + aluminium sulphate without balancing

Answer»

Answer:

BACL2 + AL2(so4)3..

you got right answer BRO..

13.

A element is found in nature in two isotopic forms with mass numbers

Answer»

Answer:

CARBON

Explanation:

carbon has TWO isotopic FORMS I BELIEVE

14.

Common salt is what?? Acidic,basic, or slightly alkyline

Answer»

Answer:

Table salt, NACL, is the product of an acid (HCl) and a BASE (NaOH). The reaction that PRODUCES it is NaOH + HCl -> NaCl + H2O. It is NEUTRAL (pH = 7). Acids have pH < 7....

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15.

Conductivity of alkali metal less than alakaline eartg

Answer»

Explanation:

The elements in group one of the periodic table (with the exception of hydrogen - see below) are known as the alkali metals because they form alkaline solutions when they react with water. This group includes the elements lithium, sodium, potassium, rubidium, caesium and francium. Each of these elements has just one valence electron, which means that they form only weak metallic bonds. As a RESULT, they are relatively soft and have low melting points.

The single valence electron is easily LOST, making these metals highly REACTIVE. They react vigorously with both air and water - when sodium comes into contact with water, for example, it reacts violently to form sodium hydroxide and hydrogen. The heat of the reaction actually ignites the hydrogen! Alkali metals also readily COMBINE with the elements of group seventeen (chlorine, fluorine, bromine etc.) to form stable ionic compounds like sodium chloride...

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16.

Concentration field of evaporating water droplet on a hydrophilic surface

Answer»

Explanation:

Water droplet evaporation on CU- BASED HYDROPHOBIC surfaces with nano- and micro-structures .... Electric field based fabrication METHODS for multi-scale structured surfaces

17.

Verify the law of multiple proportion with the help of 3 compound formed by C and H​

Answer»

Here you go

  • Just like different combinations are possible in food, different combinations are also possible for elements that make up compounds.
  • Compounds are made up of atoms of different elements.
  • There are compounds made up of the same elements, like carbon MONOXIDE (CO) and carbon dioxide (CO2).
  • Both compounds are made of carbon (C) atoms and oxygen (O) atoms; however, the ratios of carbon and oxygen in each COMPOUND is different.
  • This illustrates the LAW of multiple proportions.
18.

Calculate the oxidation state of cr in k2cr2o7 and cr2o3​

Answer»

Answer:

OXIDATION state of CR in k2cr207 and cr203 is 6 and 3.

Explanation:

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19.

Chemical which is filled in thermometer​

Answer»

Answer:

MERCURY chemical is FILLED in thermometer. .

EXPLANATION:

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20.

Can we store copper sulphate solution in iron vessel

Answer»

ANSWER:

No , because iron is more REACTIVE than COPPER .

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21.

Can copper displace zinc from zinc sulphate solution

Answer»

EXPLANATION:

If a PIECE of zinc metal is added to aluminium sulphate solution, no reaction takes place. So aluminium is more reactive than zinc. ... So, copper is LESS reactive than zinc, aluminium and IRON. Aluminium can displace Zn from zinc sulphate solution, CU from copper sulphate solution and Fe from ferrous sulphate solution.

22.

Comperative analysis of ammonia ,urea and uric acid

Answer»

ANSWER:

The nitrogenous EXCRETION of twelve species of Amphibia and two species of Crocodilia was STUDIED. The urinary content of ammonia, UREA, uric ACID, ..

23.

Combustion of glucose take place either in blood stream or in cells

Answer»

Answer:

Cellular respiration can be broken down into 4 stages: Essentially, SUGAR (C6H12O6) is burned, or oxidized, down to CO2 and H2O, releasing energy (ATP) in the process. ... This process occurs PARTIALLY in the CYTOPLASM, and partially in the mitochondria. The mitochondria is another organelle in eukaryotic cells.

24.

How can u made a chemical equation more informative?​

Answer»

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\underline\color{Green}{<klux>CHEMICAL</klux>\: EQUATION}

U MAKE YR CHEMICAL EQUATION MORE EFFECTIVE BY ADDING THE RECTANT OR PRODUCT IS EITHER SOLID GAS ,LIQUID

IT IS SOLVENT

IT IS SOLUTE

BY ADDING MORE INDICATION

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25.

Explain Newlands law of octaves .Write its limitations.

Answer»

Answer:

LIMITATIONS of LAW of octaves: The law of octaves has the followinglimitations ; (A) The law of octaveswas found to be APPLICABLE only upto calcium. It was not applicable to elements of higher atomic MASSES. ... (C) Newlands placed two elements INTHE same slot to fit elements in thetable.

26.

Do solids diffuse into each other? Explain.

Answer»

ANSWER:

No

Explanation:

No because there is no intermolecular space for the PARTICLES to intermix with each other. Thus tgey can not diffuse in each other. DIFFUSION can take place in solid.diffusion in solids is a very slow process because the particles in solids do not MOVE from their fixed positions hence they only VIBRATE.

27.

Aq na2so4 solution is 50% ionised find 'vants hoff factor

Answer»

ANSWER:

VANT HAFF FACTOR (i) =2

28.

Calculate the no. Of electrons which will weight one gram

Answer»

Explanation:

MASS of an electron = 9.1 X 10-28 g

Or

9.1 x 10-28 g contains = 1 electron

Therefore 1g contains = 1/9.1 x 10-28 *1 = 1.098 x 1027 electrons

29.

Calculation of co2 dissolved in water after titration

Answer»

Answer:

co2 from the AIR dissolves in.water and forms carbonic acid , H2co3. this can AFFECT the end point of acid base titration .EXCESSIVE carbon DIOXIDE in the sample makes it more and more acidic as time passes. .

Explanation:

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30.

Chemical structure of nucleotide showing at and gc pairing

Answer»

Explanation:

  • A PURINE base always pairs with a pyrimidine base or more SPECIFICALLY GUANOSINE (G) with Cytosine (C) and Adenine (A) with Thymine (T) or Uracil (U). Notice the G-C pair has three hydrogen bonds while the A-T pair has two hydrogen bonds.
31.

Chlorobenezd is prepared commercially by what reaction

Answer»

EXPLANATION:

CHLOROBENZENE is PREPARED COMMERCIALLY by:

(a) Grignard REACTION (b) Raschig process (c) Wurtz-Fittig reaction (d) Friedel-Crafts reaction.

32.

Chemical treatment of composite to reduce the hydrophilic nature

Answer»

Explanation:

The MAJOR difficulty that limits the extended use of NATURAL fiber is their hydrophilic nature, which affects the adhesion to a HYDROPHOBIC polymeric matrix and decreases the mechanical PROPERTIES of the resulting composite material. ... Among popular chemical treatments on natural fiber are alkali and silane TREATMENT

33.

✌️Eya!✌️✨Good Morning!✨◾What is the full form of CHEMISTRY...?❣️lakshitagupta❣️followme​

Answer»

ANSWER:

\huge\green {Hii\: mate!!}

FULL form of Chemistry is:=

Carbon

Hydrogen

ELEMENTS

METALS

informating

sorting

TESTING

reacting

yielding

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34.

Name one hydrocarbon in which the ratio of C and H is 4:9​

Answer»

Answer:

C4nH9n= C8H18

=OCTANE. { CnH(2n+2) is the formula for ALKANE.}

35.

The Active electrophile present in H2SO4for Sulphonation is:-options are1:SO22:+SO23:SO34:+SO3​

Answer»

ANSWER:

1

Explanation:

i THINK it's RIGHT answer

36.

Write the chemical formula of sodium sulphate​

Answer»

The CHEMICAL formula of sodium sulphate is NaSo4

Hope it HELPS you

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37.

Carbon, hydrogen, oxygen are present as 44%,6.6%,53.4% calculate the empirical formula​

Answer»

ANSWER:

The EMPIRICAL FORMULA of COMPOUND is CH2O

38.

H2 gas is liberated when water treated with

Answer»

HYDROGEN gas is LIBERATED when water is treated with REACTIVE alkali earth metals like NA, K etc

Hope it helps

39.

why is that the rates of mos of the reaction increase when the temperature of reaction mixture is increased???​

Answer»

As you increase the temperature the rate of reaction increases. As a rough approximation, for many reactions happening at around room temperature, the rate of reaction doubles for EVERY 10°C rise in temperature.

You have to be careful not to take this too literally. It doesn't apply to all reactions. EVEN where it is approximately TRUE, it may be that the rate doubles every 9°C or 11°C or whatever. The number of DEGREES needed to double the rate will also change gradually as the temperature increases.

40.

Calculate the pressure exerted by 44 gram co2contained in an container of volume 500ml at 27°c​

Answer»

Answer:

49.26atm PRESSURE is EXERTED

41.

Chemical bonding and molecular geometry by gillespie

Answer»

Answer:

Ideal for undergraduate and first-year GRADUATE courses in chemical BONDING, Chemical Bonding and MOLECULAR Geometry: From LEWIS

42.

Chemicals commonly used ind household and find chemical name formula and uses

Answer»

ANSWER:

BAKING SODA NaHCO3

Salt NaCl

vinegar

detergent

etc

43.

Chemical reaction and equation notes by dron study

Answer»

Answer:

#CHEMICAL Reaction

The combination or decomposition of reactant make PRODUCT are called chemical reactions.

For EXAMPLE. Hydrogen+Oxygen= Water

#Chemical Equation

In this the chemicals have their special type of symbols which we WRITTEN in place of chemical in a equation.

For example H2 + O2 = H2O

44.

Calculate the osmotic pressure of 5 urea solution at 25 degree c

Answer»

Answer:

Explanation:

OSMOTIC presuure=i∗C∗R∗T

where, C=concentration of solute(in terms of Molarity)

R= GAS constant =0.082L(atm)(mol)−1K−1

T=temperature (in Kelvin)

i=Van’t-Hoff factor(=1 for non-electrolyte)

5% urea solution means 5G urea is present in 100ml of solution.

mole of urea=weight

given/Molecular weight of urea

=5g60gmol−1=112

Hence Concentration of urea

(in terms of Molarity)

= (moles of urea(n) /VOLUME of solution ) ×1000

={(112)/100}∗1000

=1012

Hence Osmotic pressure =1×(10/20)×0.082×300 atm

=20.52atm

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45.

What is the chemical formula of phosphorus pentoxide​

Answer»

ANSWER:

P4O10 is the FORMULA........

46.

What is meant by aliphatic compounds​

Answer»

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An Aliphatic compound is an ORGANIC copound CONTAINING carbon and hydrogen JOINED TOGETHER in straight CHAINS, or non atomatic rings.

47.

A gaseous hydrocarbon of vapor dwnsity 14 contains 85.2â„…

Answer»

Answer:

Carbon=2 and hydrogen = 5

Thus Empirical formula of the compound is GIVEN by, C2H5

Empirical formula mass of C2H5 = 2*12 + 5*1 = 29 g

Now we can DETERMINE molecular formula mass from vapor density = 2 * 28 = 58 g

Therefore n = 58/29 = 2

Thus Molecular formula of the compound = 2 * C2H5 = C4H10

48.

Burning a candle is an example of a(n) ___________ reaction

Answer»

ANSWER:CHEMICAL REACTION.or NON -

REVERSIBLE reaction

49.

Calculate total charge of protons in single molecule of co2

Answer»

Answer:

1.6×10 to the POWER -19

50.

Benzoic acid is dissolved in benzene , the value of van't hoff factor will be

Answer»

Answer:

The VALUE of van't hoff FACTOR will be 0.5 probably not SURE