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.

How is ethanol obtained from 2-butene? [Delhi 2012]

Answer»

There actually are SIMPLE... Bubbling ozone thorough a solution of 2-butene and methanol at a temperature of -78°C will give you an ozonide, which on REDUCTION with zinc will PRODUCE two moles of ethanal. Reducing ethanal with LITHIUM aluminum HYDRIDE and hydrolysing will produce ethanol.KEEP SMILING...MARK AS BRAINLIST..

2.

Which of the following has least weight :- (1) 0.2 g - atom of Na (2) 3 × 10^23 carbon atoms (3) 1 mole of S-atoms (4) 7gm of Ag

Answer»

I THINK its 3. that is 3×10²³ CARBON atomscheck it once I am not CONFIDENT

3.

Cotton ball will float or sink​

Answer» BALL will FLOAT.
4.

Identify the salt. salt x is treated with acid produces carbon dioxide and aqueous solution reacts with naoh solution to form pale blue precipitate which turns inky blue in excess of naoh.​

Answer»

The SALT X is CUCO3(COPPER CARBONATE).

5.

what happens when ageous solution of silver nitrate (AgNo3)is mixed with that of sodium chloride. (Nacl)​

Answer» 2 and AGCL3 is FORMED.
6.

Wooden block will float or sink​

Answer» WOODEN blockIt floatsplz MARK me as BRAINLIST
7.

What is polyester? give examples​

Answer» POLYAMIDES and polyesters are two groups of SYNTHETIC FIBRES with high strength, not easily stretched and used as textileExplanation:TERYLENE is an example of POLYESTER polymers.
8.

Determine the oxidising and reducing agent in the following reactions​

Answer»

i-Na=Reducing,O=Oxidising agentii-CuO=Oxidising,H=Reducing AGENT

9.

Draw the structure of hex-l-en-3-ol compound.

Answer»

In Hex−1−en−3−ol PARENT chain has 6 carbons. The first carbon has double bond. The third carbon has alcohol −OH functional GROUP as substituent. SEE the attached image, that may help you¶ THANK YOU ¶PLEASE MARK AS BRAINLIEST ~~~^^

10.

Draw the structural formula of 2-methylpropan-2-ol molecule. [Delhi 2012]

Answer»

tion:Structure in the attachment ADDITIONAL information :-Full form of IUPAC :-International union of PURE and applied chemistry The number of carbon ATOMS in a hydrocarbon is indicated by using the following stems :For 1 carbon it is indicated by MethFor 2 carbon it is indicated by EthFor 3 carbon it is indicated by propFor 4 carbon it is indicated by but For 5 carbon it is indicated by pentA saturated hydrocarbon containing single bonds is indicated by - ane. An unsaturated hydrocarbon containing double bonds is indicated by - ene. An unsaturated hydrocarbon containing triple bonds is indicated by - yne.

11.

Write IUPAC name of the given compound: [AI 2015 Patna]

Answer»

tion:2-methyl-2-propen-1-olAdditional information :-FULL form of IUPAC :-International union of pure and applied CHEMISTRY The number of carbon atoms in a hydrocarbon is indicated by using the FOLLOWING stems :For 1 carbon it is indicated by MethFor 2 carbon it is indicated by EthFor 3 carbon it is indicated by propFor 4 carbon it is indicated by but For 5 carbon it is indicated by pentA saturated hydrocarbon containing single bonds is indicated by - ANE. An unsaturated hydrocarbon containing double bonds is indicated by - ene. An unsaturated hydrocarbon containing TRIPLE bonds is indicated by - yne.

12.

Write IUPAC name of the compound: [Delhi 2015(C)]

Answer»

butan-2-ol is the IUPAC NAME of this COMPOUND

13.

Write the IUPAC name of the following: [AI 2015 Bhubneshwar]

Answer»

tion:1-phenyl-2-propanolAdditional information :-Full FORM of IUPAC :-INTERNATIONAL union of pure and applied chemistry The number of carbon atoms in a hydrocarbon is indicated by using the FOLLOWING stems :For 1 carbon it is indicated by MethFor 2 carbon it is indicated by EthFor 3 carbon it is indicated by propFor 4 carbon it is indicated by but For 5 carbon it is indicated by pentA saturated hydrocarbon containing single bonds is indicated by - ane. An UNSATURATED hydrocarbon containing double bonds is indicated by - ene. An unsaturated hydrocarbon containing triple bonds is indicated by - yne.

14.

Write IUPAC name of the following:

Answer»

tion:2,2-Dimethylpropan-1-ol Additional information :-FULL form of IUPAC :-International union of pure and applied chemistry The number of carbon ATOMS in a hydrocarbon is indicated by using the following STEMS :For 1 carbon it is indicated by MethFor 2 carbon it is indicated by EthFor 3 carbon it is indicated by propFor 4 carbon it is indicated by but For 5 carbon it is indicated by pentA SATURATED hydrocarbon containing single bonds is indicated by - ane. An unsaturated hydrocarbon containing double bonds is indicated by - ENE. An unsaturated hydrocarbon containing triple bonds is indicated by - yne.

15.

Write the IUPAC name of the following compound: [Foreign 2012]

Answer»

tion:4-hexen-3-olAdditional information :-Full form of IUPAC :-International union of pure and APPLIED CHEMISTRY The number of carbon atoms in a hydrocarbon is indicated by using the following STEMS :For 1 carbon it is indicated by MethFor 2 carbon it is indicated by EthFor 3 carbon it is indicated by propFor 4 carbon it is indicated by but For 5 carbon it is indicated by pentA saturated hydrocarbon containing SINGLE bonds is indicated by - ane. An unsaturated hydrocarbon containing double bonds is indicated by - ene. An unsaturated hydrocarbon containing triple bonds is indicated by - yne.

16.

Write the IUPAC name of the given compound: [AI2015]

Answer»

tion:2-methyl-propan-1,3-diolAdditional INFORMATION :-Full form of IUPAC :-International union of pure and applied chemistry The number of carbon atoms in a HYDROCARBON is indicated by USING the following stems :For 1 carbon it is indicated by MethFor 2 carbon it is indicated by EthFor 3 carbon it is indicated by propFor 4 carbon it is indicated by butFor 5 carbon it is indicated by pentA saturated hydrocarbon CONTAINING single bonds is indicated by - ANE. An unsaturated hydrocarbon containing double bonds is indicated by - ene. An unsaturated hydrocarbon containing triple bonds is indicated by - yne.

17.

Write the IUPAC name of the given compound: [Foreign 2015]

Answer»

3-methyl-but-2-en-1-ol is the IUPAC NAME of this COMPOUND

18.

Dettol contains phenolic compound. [True/False]

Answer»

the ANSWER for your question is true please MARK my answer as BRAINLEST answer

19.

Ethers have lower boiling point than alcohol. [True/False]

Answer»

the ANSWER for your QUESTION is FALSE please MARK my answer as brainlest answer

20.

Diethyl ether has dipole moment because they are bent molecule. [True/False]

Answer»

the ANSWER for your question is true PLEASE mark my answer as BRAINLEST answer

21.

Hydrogen chloride gas is flowed into a beaker that contains acetone. 2G of zinc powder is added into the beaker. What would be observed?

Answer»

It is a SINGLE replacement reaction where zinc metal displaces the hydrogen to form hydrogen GAS and zinc chloride, a salt. Zinc REACTS QUICKLY with the acid to form bubbles of hydrogen. Explanation: the metal zinc reacts with hydrochloric acid it PRODUCE hydrogen gas and zinc chloride.

22.

potato chips manufactures fill the packets of chips with a gas. Name the gas that is filled &state the reasons for its filling ​

Answer»

Nitrogen gasExplanation:because it PREVENTS to OXIDATION with air and prevents stale noss of chips so they USE air ALONG with nitrogen GAS

23.

Is sodium chloride is sublimation example​

Answer» UM CHLORIDE is not SUBLIMATION EXAMPLE
24.

Answers the following questions

Answer» SORRY I can't answer the QUESTION mark after the HOLIDAYS
25.

Prepare 0.2 N – 500 ml Na2CO3

Answer»

Explanation:      0.1 N SODIUM CARBONATE SOLUTION, HOW TO PREPARE SODIUM CARBONATE IN LABORATORY, HOW TO PREPARE SODIUM CARBONATE SOLUTION IN LABORATORY, MOLAR SOLUTION, MORLARITY, NORMAL SOLUTION, NORMALITY, PREPARATION OF SOLUTION, SODIUM CARBONATE SOLUTION, STANDARDIZED SOLUTIONA solution is a homogeneous mixture COMPOSED of only one phase. In such a mixture, a solute is a substance dissolved in another substance called as the solvent. The concentration of a solute in a solution is a measure of how MUCH of that solute is dissolved in a solvent.Standard SOLUTIONS are those in which the exact amount of a substance presents in a definite volume of solution. To prepare the standard solution, a known WEIGHT of solute is measured on a well-calibrated weighing scale and then dissolved in a solvent (usually distilled water) to make up a specific volume.

26.

What mass of glucose in grams would need to be burned to produce 8354 kj of heat?

Answer»

100grams of glucose NEED to be burned to PRODUCE 8354 kj of HEAT

27.

When a metal is burnt, it's weight is increases by 24 percentage. The equivalent weight of metal will be

Answer»

i THINK it MAY DECREASE

28.

Phenol gives o and p-nitrophenol with _________ .

Answer»

Explanation:Phenols give o- and p-nitrophenol on nitration with CONC. HNO3 and H2SO4 mixture. —OH group in PHENOL is o–, p– directing. phenols-give-o-and-p-nitrophenol-on-nitration-with-conc-hno3-and-h2so4-mixture

29.

Match the starting materials given in Column I with the products formed by these (Column II) in the reaction with HI. [NCERT Exemplar]

Answer»

I don't KNOW the ANSWER so SORRY

30.

O-nitrophenol has _________ melting point than /j-nitrophenol.

Answer»

Explanation:            In p-nitrophenol, MOLECULAR association takes PLACE due to extensive hydrogen bonding between the molecules (intermolecular hydrogen bonding). Therefore, it has higher MELTING and boiling points. In o-nitrophenol, since the OH and NO2 are in close proximity to each other, intramolecular hydrogen bonding takes place.

31.

In the following question a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices. (a) Assertion and reason both are correct and reason is correct explanation of assertion. (b) Assertion and reason both are wrong statements. (c) Assertion is correct statement but reason is wrong statement. (d) Assertion is wrong statement but reason is correct statement. (e) Both assertion and reason are correct statements but reason is not correct explanation of assertion. Assertion: Bond angle in ethers is slightly less than the tetrahedral angle. Reason: There is a repulsion between the two bulky (—R) groups. [NCERT Exemplar]

Answer»

I THINK so OPTION a is the answer for your QUESTION OK follow me please mark my answer as BRAINLEST answer

32.

Phenol reacts with Br2 in CS2 to give _________ as major product.

Answer»

ENOLHOPE it HELPS you

33.

Which of the following reactions will yield phenol? [NCERT Exemplar]

Answer»

I can't UNDERSTAND the MEANING so I don't KNOW

34.

Match the structures of the compounds given in Column I with the name of the compounds given in Column II. [NCERT Exemplar]

Answer» HEY you did not GIVE the STRUCTURES UPLOAD this
35.

E: In the following questions two or more options may be correct. (Q.21 to Q.23) 32. Which of the following are used to convert RCHO into RCH2OH? [NCERT Exemplar] (a) H2/Pd (b) LiAlH4 (c) NaBH4 (d) Reaction with RMgX followed by hydrolysis

Answer»

the answer for your QUESTION is option C is the answer for your question OK follow me PLEASE MARK my answer as brainlest answer

36.

The major organic product in the reaction, CH3 — O — CH(CH3)2 + HI → product: is/are

Answer» RECT ANSWER is (a)
37.

In the above sequence Z is (a) Toluene (b) Cresol (c) Benzene (d) Benzol

Answer»

the VALUE of Z is BENZOL

38.

1-propanol and 2-propanol can be best dis¬tinguished by (a) Oxidation with KMnO4 followed by reaction with Fehling solution. (b) Oxidation with acidic dichromate followed by reaction with Fehling solution. (c) Oxidation by heating with copper followed by reaction with Fehling solution. (d) Oxidation with concentrated H2SO4 followed by reaction with Fehling solution.

Answer»

so the ANSWER is B .MARK as BRAINLIST

39.

Identify Z in the series

Answer»

I don't KNOW the ANSWER so SORRY.

40.

Parent acid and parent base of Ammonium carbonate

Answer»

Ammonium CARBONATE belongs to the class of organic compounds known as organic CARBONIC ACIDS. Organic carbonic acids are compounds comprising the carbonic acid functional group. Ammonium carbonate is a very weakly acidic COMPOUND (based on its PKA)

41.

Which main product is obtained by reaction of sodium hydroxide with zinc metal ​

Answer»

Explanation:2NaoH+Zn ———>Na2Zno2+H2

42.

What is the oxidation no.of nitrogen in dinitrogen pentoxide​

Answer»

ur answerThe OXIDATION NUMBER of NITROGEN in dinitrogen pentoxide is 5....

43.

WHAT BOND IS FORMED BETWEEN AN ELEMENT OF GROUP I A AND VII A OF THE PERIODIC TABLE. *​

Answer»

ionic bond ........is formed between an element of GROUP 1,A and VII A of the periodic table

44.

Why the polymers are superior to other materials?

Answer»

Explanation:A polymer is a large molecule, or macromolecule, composed of many repeated subunits.[6] Due to their broad range of properties,[7] both synthetic and NATURAL polymers play essential and ubiquitous roles in everyday life.[8] Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers such as DNA and proteins that are fundamental to biological structure and function. Polymers, both natural and synthetic, are created via polymerization of many small molecules, known as monomers. Their consequently large molecular mass, relative to small molecule compounds, produces unique physical properties including toughness, viscoelasticity, and a tendency to form glasses and semicrystalline structures rather than crystals. The terms polymer and resin are often synonymous with plastic. The term "polymer" derives from the Greek word πολύς (polus, meaning "many, much") and μέρος (meros, meaning "part"), and refers to a molecule whose structure is composed of multiple repeating units, from which originates a characteristic of high relative molecular mass and attendant properties.[3] The units composing polymers derive, actually or CONCEPTUALLY, from molecules of low relative molecular mass.[3] The term was coined in 1833 by Jöns Jacob Berzelius, though with a definition distinct from the modern IUPAC definition.[9][10] The modern concept of polymers as covalently bonded macromolecular structures was proposed in 1920 by Hermann Staudinger,[11] who spent the NEXT decade finding experimental evidence for this HYPOTHESIS.[12] Polymers are studied in the FIELDS of biophysics and macromolecular science, and polymer science (which includes polymer chemistry and polymer physics). Historically, products arising from the linkage of repeating units by covalent chemical bonds have been the primary focus of polymer science; emerging important areas of the science now focus on non-covalent links. Polyisoprene of latex rubber is an example of a biological polymer, and the polystyrene of styrofoam is an example of a synthetic polymer. In biological contexts, essentially all biological macromolecules—i.e., proteins (polyamides), nucleic acids (polynucleotides), and polysaccharides—are purely polymeric, or are composed in large part of polymeric components—e.g., isoprenylated or lipid-modified glycoproteins, where small lipidic molecules and oligosaccharide modifications occur on the polyamide backbone of the protein.[13

45.

The compound B is formed in the sequence of the reaction given below: The compound B is (a) Salicylaldehyde (b) Benzoic acid (c) Salicylic acid (d) Cinnamic acid

Answer» SALICYLIC ACID Explanation:is the right answer of your QUESTION mark brilliant answer like my answer follow me follow back
46.

The correct acidic strength order of the following (a) I > II > III (b) III > I > II (c) II > III > I (d) I > III > II

Answer»

please MARK my answer as BRAINLEST answer EXPLANATION:I think so option b is the answer for your QUESTION OK FOLLOW me

47.

Phenols are more acidic than alcohols because (a) Phenoxide ion is stablised by resonance (b) Phenols are more soluble in polar solvents (c) Phenoxide ion does not exhibit resonance d) Alcohols do not lose H atoms at all

Answer»

tion:a) is the correct option PLZ MARK me as the brainliest and I will FOLLOW you plz mark plz plz plz plz plz plz

48.

Which of the following reagents cannot be used to distinguish between phenol and benzyl alcohol? (a) FeCl3 (b) Litmus soln (c) Br2/CCl4 (d) All of these

Answer» RECT ANSWER is (â)
49.

Which of the following species can act as the strongest base?

Answer»

I THINK so option c is the ANSWER for your question OK follow me Explanation:please mark my answer as BRAINLEST answer

50.

The above reaction is known as (a) Williamson’s reaction. (b) Hofmann’s synthesis. (c) Mendies reaction, (d) Darzen’s reaction.

Answer»

I THINK so option a is the answer for your QUESTION OK follow me EXPLANATION:please MARK my answer as brainlest answer