Introduction:

In everyday life, chemistry Here you will find JEE Main previous year questions and solutions. Chemistry is the discipline of science concerned with the study of matter’s properties and transformations. Everything has a chemistry component to it, from how our bodies exchange oxygen to how our cosmos was created. Preservatives, binding agents, flow stabilizers, artificial sweeteners, and other chemicals are employed in our food. Drugs, preservatives, flavours, antioxidants, sweetening agents, and the cleansing effect of soaps and detergents are all important issues in chemistry in everyday life.

FAQ’s

Ques 1: Which of the following could be used as a rocket propellant?

(1) a mixture of liquid oxygen and liquid argon

(2) Liquid hydrogen in combination with liquid oxygen

(3) A mixture of liquid nitrogen and liquid oxygen

(4) Liquid hydrogen in combination with liquid nitrogen

Ans:

Combustion is aided by the presence of oxygen. Liquid hydrogen has a low mass and a high combustion enthalpy. Rockets run on liquid hydrogen and liquid oxygen, which are both good fuels.

As a result, option (2) is the correct answer.

 

Ques 2: Which of the following nitrates will leave metal behind when heated to high temperature?

(1) Nitrate of copper

(2) Nitrate of manganese

(3) Nitrate of silver

(4) Nitrate of ferric iron

Ans:

AgNO3 + NO2 (12) O2

As a result, option (3) is the correct answer.

 

Ques 3: The level of diabetes is determined by insulin synthesis and its effect on the human body. Which of the following groups does this chemical fit into?

(1) An enzyme that works with another.

2) An antimicrobial agent

3) A digestive enzyme

4) A hormonal substance

Ans:

Insulin is a hormone that is produced by the pancreas.

As a result, option (4) is the correct answer.

 

Ques 4: In the soap industry, the distillation procedure best suited for extracting glycerol from spent-lye is:

(1) Distillation at a low pressure

(2) Distillation that is simple

(3) Distillation by fractions

(4) Distillation using steam

Ans:

Distillation at reduced pressure is the most effective method for separating glycerol from leftover lye in the soap business. At atmospheric pressure, glycerol has a boiling point of 2900°C. It decomposes before distilling at this temperature. As a result, the distillation is done at lower pressure by using a vacuum, which lowers the boiling temperature of glycerol and so prevents it from decomposing.

As a result, option 1 is the correct answer.

Ques 5: Which of the following medications is used to treat a fever?

(1) Anesthetic

(2) Analgesic

(3)Antibiotics

(4) Calming agent

Ans:

To lower the temperature, antipyretics are administered.

As a result, option (2) is the correct answer.

Ques 6: Which of the substances listed below is not an antacid?

(1) Hydroxide of aluminium

(2) Cimetidine is a kind of antibiotic.

(3) Phenelzine is a kind of phenelzine.

(4) The drug ranitidine

Ans:

Antidepressant phenelzine is prescribed. Antacids include aluminium hydroxide, cimetidine, and ranitidine.

As a result, option (3) is the correct answer.

Ques 7: Aspirin is a drug that is used to treat a variety of ailments.

(1) Acetyl salicylic acid

(2) Phenyl salicylate

(3) Acetyl salicylate

(4) Methyl salicylic acid

Ans:

Acetylsalicylic acid is the chemical name for aspirin.

As a result, option 1 is the correct answer.

Ques 8:Which of the following fertilizers increases soil acidity when used on a regular basis?

(1) Nitrate of potassium

(2) Use of urea

(3) Phosphate superphosphate

(4) Sulfate of ammonium

Ans:

Ammonium sulphate is a strong acid-weak base salt. When it is hydrolyzed, it creates H+ ions. This aids in increasing the soil’s acidity.

As a result, option (4) is the correct answer.

Ques 9: Which of the following is DDT?

(1) Greenhouse gas emissions

(2) A type of fertilizer

(3) Biodegradable materials

(4) Pollutant that is not biodegradable

Ans:

DDT is a contaminant that does not degrade.

As a result, option (4) is the correct answer.

Ques 10:A red solid is water-insoluble. When some KI is added to water, however, it becomes soluble. When a red solid is heated in a test tube, some violet-coloured vapours are released, and metal droplets develop on the cooler areas of the test tube. The solid red colour is

(1) Glucose

(2) Hydrogen peroxide

(3) Pb304

(4) (NH₄)₂Cr₂0₇ (NH₄)₂Cr₂0₇ (NH₄)₂Cr₂0₇ (NH₄)₂

Ans:

HgI₂ decomposes into HgI + Hg + I₂ when heated.

As a result, option 1 is the correct answer.

Ques 11: Which of the following is the right statement?

(1) Ammonia solution dissolves solely AgCl from a mixed precipitate of AgCl and Agl.

(2) Adding potassium ferrocyanide solution to ferric ions produces a dark green precipitate.

(3) When we boil a solution containing K+, Ca2+, and HC03, we produce a K, Ca precipitate (C03).,

(4) In the reducing flame, manganese salts produce a violet borax bead test.

Ans:

2NH3 + AgCl = Ag(NH3)2 Cl

As a result, option 1 is the correct answer.

Ques 12 : Which of the nuclear reactions below will produce an isotope?

(1) Emission of neutron particles

(2) emission of positrons

(3) the emission of a-particles

(4) emission of p-particles

Ans:

An isotope will be created as a result of neutron particle emission.

As a result, option 1 is the correct answer.

Ques 13:What causes “drug-induced poisoning”?

(1) Reversible binding at the enzyme’s active location

(2) Changing the conformation of the enzyme’s binding site

(3) Binding to the enzyme’s allosteric sites

(4) Binding to the enzyme’s active site in an irreversible manner

Ans: Drug-induced toxicity is caused by binding at the enzyme’s allosteric regions.

As a result, option (3) is the correct answer.

Ques 14: Which of the following antibiotics is bactericidal?

(1) The antibiotic ofloxacin

(2) The antibiotic tetracycline

(3) Chloramphenicol is a kind of antibiotic that is used to treat bacterial infections.

(4) Erythromycin is a kind of antibiotic.

Ans:

Ofloxacin is an antibiotic that kills bacteria.

As a result, option 1 is the correct answer.