Explore topic-wise InterviewSolutions in Current Affairs.

AB₂ forms ionic bonds because an aqueous solution of an ionic compound conducts electricity because there are plenty of free ions in the solution which are able to conduct electric current.

Non-metals typically have larger sizes as compared to the metals because of which to attain a stable noble gas configuration, it is difficult for a non-metal to lose electrons and on the other hand they can easily accept electrons with less energy involved to fill the octet.

Hence non-metals gain electrons to form anions.

Gold and platinum are highly resistant to corrosion.

• Grills of doors and windows are made from iron. Iron has a tendency to undergo corrosion.
• Paint does not allow air or moisture to come in contact with iron surface. Therefore, to prevent rusting of iron. grills of doors and windows are always painted before they are used.

Gold ornaments look new even after several years of use because gold does not corrode when exposed to atmosphere. It is a highly unreactive metal which remains unaffected by air, water vapour and other gases in the atmosphere.

XY₂ has ionic bonds.

(i) XY₂ would conduct electricity when dissolved in water.

(ii) XY₂ would have high melting and boiling point.

The process of heating a sulphide ore strongly in the presence of excess air is called roasting. 

The process of heating a carbonate ore strongly in the presence of limited air is called calcination.

(i) Most reactive metal is Q as it has replaced both P and R from their compounds.

(ii) Element R is least reactive as it has been replaced by both R and Q.

(iii) Displacement reaction.

(a) An alloy is a homogenous mixture of two or more metals, mixed in a suitable proportion.

(b) Corrosion is the process of destruction of a material caused by chemical reactions between the material and the surrounding environment.

Using indicators like litmus, phenolphthalein and methyl orange.

(a) rusting

(b) air; water

(c) galvanisation

(d) tin; chromium

(e) green

(j) zinc

(g) tin

(h) carbon

(i) amalgam

(j) less

(k) gangue

Class 12 Chemistry MCQ Questions of Chemistry in Everyday Life with Answers helps you with analyzes your knowledge of the topics. The appropriate answers are likewise accommodated reference. Sarthaks eConnect had prepared based on the latest syllabus and examination pattern issued by CBSE.

Our teachers have provided below MCQ Questions for Class 12 Chemistry with answers which will help students to revise and get more marks in exams. Practice the given Chemistry in Everyday Life MCQ Questions for Class 12 with Answers available here.

Practice MCQ Question for Class 12 Chemistry chapter-wise

1. Which of the following is used as tranquilizer?

(a) Naproxene
(b) Tetracycline
(c) Chlorpheniramine
(d) Equanil

2. Artificial sweetener which is stable only under cold conditions only is

(a) saccharine
(b) sucralose
(c) aspartame
(d) alitame

3. Bithional added to soap acts as

(a) buffering agent
(b) antiseptic
(c) softener
(d) drying

4. Mixture of chloroxylenol and terpineol acts as

(a) antiseptic
(b) antipyretic
(c) antibiotic
(d) analgesics

5. Drugs that bind to receptor site and inhibit its natural function are called

(a) antagonists
(b) agonists
(c) enzymes
(d) molecular targets

6. The artificial sweetener which contains chlorine that has the appearance and taste as that of sugar and is stable and cooking temperature:

(a) Aspartame
(b) Saccharin
(c) Sucralose
(d) Alitame

7. Bactericidal antibiotic among the following is

(a) ofloxacin
(b) erythromycin
(c) chloramphenicol
(d) tetracycline

8. Sodium benzoate is used as

(a) food preservative
(b) artificial sweetener
(c) antioxidant
(d) detergent

9. Allergy is caused by the production of in the body

(a) Hormones
(b) Enzymes
(c) Vitamins
(d) Histamines

10. Which of the following can possibly be used as analgesic without causing addiction and modification?

(a) Morphine
(b) Diazepam
(c) N-acety 1-para-aminophenol
(d) LSD

11. Heroin is

(a) Narcotic
(b) Non-narcotic
(c) Anaesthetic
(d) Antiseptic

12. Which one is a broad spectrum drug?

(a) Chloramphenicol
(b) Chloroquine
(c) Chloroxylenol
(d) Plasmoquine

13. A drug that is antiseptic as well as analgesic is

(a) Para acetamidophenol
(b) Chloropromazine hydrochloride
(c) Chloramphenicol
(d) Paracetamol

14. Chemotherapy is

(a) Use of heat for therapeutic effect
(b) Use of chemical for therapeutic effect
(c) Use of natural reagent for therapeutic effect
(d) All of these

15. Drugs which compete with natural substrate for their attachment on the active sites of enzymes are called

(a) Enzyme Inhibitors
(b) Competitive Inhibitors
(c) Non-competitive Inhibitors
(d) Drug targets

16. Drugs which interfere with natural action of histamine by competing with histamine are called

(a) Antidepressant
(b) Antihistamines
(c) Antimicrobial
(d) Antipyretic

17. Drugs which contain mixture of norethindrone and ethynylestradiol are

(a) Antibiotics
(b) Antifertility
(c) Antiseptic
(d) Antacid

18. Salvarsan is an antimicrobial agent which is used for curing

(a) Malaria
(b) Allergy
(c) Syphilis
(d) Depression

19. Tranquilizers are prescribed for curing

(a) Anxiety, stress, irritability
(b) The growth of microorganism
(c) Pain, Fever
(d) All of these

20. Tincture of iodine is

(a) Iodoform
(b) 100% Iodine
(c) 2-3% Iodine solution in alcohol-water
(d) Iodobenzene

21. Which of the following hormones is produced under the condition of stress which stimulates glycogenolysis in the liver of human being ?

(a) Thyroxin
(b) Insulin
(c) Adrenaline
(d) Estradiol

22. The human body does not produce :

(a) DNA
(b) Vitamins
(c) Hormones
(d) Enzymes

23. Among the following, the narrow-spectrum antibiotic is:

(a) chloramphenicol
(b) penicillin G
(c) ampicillin
(d) amoxicillin

24. Which one of the following is employed as a tranquilizer drug?

(a) Promethazin
(b) Valium
(c) Naproxen
(d) Mifepristone

25. Interferon is connected with

(a) tonic
(b) virus
(c) carbohydrate
(d) ore of iron

Answer:

1. Answer : (d) Equanil

Explanation : Meprobamate, which is sold as Equanil, is an anxiolytic carbamate analog. This was the best-selling mild tranquilizer for a time, which was eventually substituted by benzodiazepines because of their larger clinical index and reduced occurrence of harmful side effects.

2. Answer : (c) aspartame

Explanation : Aspartame is the only artificial sweetener which is stable at lower temperature and decomposes at higher temperature and also called Nutra sweet and relative sweetness value is 180.

3. Answer : (b) antiseptic

Explanation : Bithionol is generally added to the soaps as an additive to function as an antiseptic as it helps to reduce the odour produced by bacterial decomposition of organic matter on the skin. Bithionol is bis-dichlorophenol, and it is structurally similar to hexachlorophene.

4. Answer : (a) antiseptic

Explanation : Antiseptic medicine is used on the outer surface of the body part.Thus, the mixture of chloroxylenol and terpineol acts as antiseptic. Hence, the correct option for this question is A that is antiseptic.

5. Answer : (a) antagonists

Explanation : Drugs that bind to the receptor site and inhibit its natural function are called antagonists. These are useful when blocking of message is required.

6. Answer : (c) Sucralose

Explanation : The artificial sweetener containing chlorine that has the appearance and taste as that of sugar and is stable at cooking temperature is sucralose.Sucralose is derived from sugar through a multi-step patented manufacturing process that selectively substitutes three atoms of chlorine for three hydroxyl groups on the sugar molecule. This change produces a sweetener that has no calories, yet is 600 times sweeter than sucrose. 

7. Answer : (a) ofloxacin

Explanation : Ofloxacin, Penicillin, Aminoglycosides are bactericidal antibiotics. They kill bacteria. Tetracycline, Chloramphenicol and Erythromycin are bacteriostatic antibiotics. They inhibit growth of bacteria.

8. Answer : (a) food preservative

Explanation : Sodium benzoate is commonly used as a preservative in cosmetics and personal care items, such as hair products, baby wipes, toothpaste, and mouthwash . It also has industrial uses.

9. Answer : (d) Histamines

Explanation : Once the allergen binds to IgE, specific types of cells — including mast cells — will release chemicals that trigger the symptoms of the allergic reaction. Histamine is one of these chemicals. It causes the muscles in the airways and walls of the blood vessels to tighten.

10. Answer : (c) N-acety 1-para-aminophenol

Explanation : N- acetyl p-amino (paracetamol) can be used as analgesic without addition and modification.

11. Answer : (a) Narcotic

Explanation : Although some narcotics like codeine and morphine are legal if prescribed for pain relief, heroin is an illegal narcotic because it has dangerous side effects and is very addictive.

12. Answer : (a) Chloramphenicol

Explanation : The main examples of broad spectrum antibiotics in humans are tetracycline, ofloxacin and chloramphenicol. Chloramphenicol is found to be rapidly absorbed from the gastro-intestinal tract and hence can be given orally in case of typhoid, pneumonia and dysentery.

13. Answer : (a) Para acetamidophenol

Explanation :  Acetamidophenol is an antipyretic as well as analgesic drug. It lowers body temperature as well as is used to get relief from pain. It is commonly known by the name of paracetamol.

14. Answer : (c) Use of natural reagent for therapeutic effect

Explanation : Treatment that uses drugs to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. Chemotherapy may be given by mouth, injection, or infusion, or on the skin, depending on the type and stage of the cancer being treated.

15. Answer : (b) Competitive Inhibitors

Explanation : Drugs inhibit the attachment of substrate on active site of enzymes in different ways Drugs compete with the natural substrate for their attachment on the active sites of enzymes. Such drugs are called competitive inhibitors.

16. Answer : (b) Antihistamines

Explanation : Antihistamines are medicines often used to relieve symptoms of allergies, such as hay fever, hives, conjunctivitis and reactions to insect bites or stings. They're also sometimes used to prevent motion sickness and as a short-term treatment for insomnia.

17. Answer : (b) Antifertility

Explanation : An antifertility drug is a chemical substance which helps in suppressing the hormonal actions which promote fertility in women. These drugs reduce the chances of fertility by acting as protection.

18. Answer : (c) Syphilis

Explanation : Arsphenamine, also known as Salvarsan or compound 606, is a drug that was introduced at the beginning of the 1910s as the first effective treatment for syphilis and African trypanosomiasis. This organoarsenic compound was the first modern antimicrobial agent.

19. Answer : (a) Anxiety, stress, irritability

Explanation :  Benzodiazepines are prescribed to treat anxiety, insomnia, seizures, muscle spasms, agitation, alcohol withdrawal,stress, irritability and panic attacks.

20. Answer : (c) 2-3% Iodine solution in alcohol-water

Explanation : Tincture of iodine, iodine tincture, or weak iodine solution is an antiseptic. It is usually 2 to 7% elemental iodine, along with potassium iodide or sodium iodide, dissolved in a mixture of ethanol and water. Tincture solutions are characterized by the presence of alcohol.

21. Answer : (c) Adrenaline

Explanation : Adrenaline hormones in creases pulse rate and controls blood pressure. It releases glucose from liver glycogen and fatty acids from fats in emergency

22. Answer : (b) Vitamins

Explanation : The organic compounds other than carbohydrates, proteins which maintain normal growth and nutrition in the human body (but not produced in human body) are called vitamins.

23. Answer : (b) penicillin G

Explanation : Benzylpenicillin (Penicillin G) is a narrow spectrum antibiotic used for the treatment of susceptible bacterial infections.

24. Answer : (b) Valium

Explanation : Valium is a tranquilizer drug. It is mainly used to treat anxiety, insomnia, and symptoms of acute alcohol withdrawal. It acts by enhancing the effects of gamma-aminobutyric acid (GABA) in the brain.

25. Answer : (b) virus

Explanation : Interferon, any of several related proteins that are produced by the body's cells as a defensive response to viruses.

 Click here for Practice MCQ Question for Class 12 Chemistry in Everyday Life

(a) Carbon forms a large number of carbon compounds because carbon atoms can link with one another by means of covalent bonds to form long chains of carbon atoms.

Isomers.

The compounds having the same molecular formula but different structural arrangements of atoms

1. We have to understand that free carbon atom would not be in excited state under normal conditions. 

2. When the carbon atom is ready to form bonds with other atoms, the energy required for excitation is taken up from bond energies, which are the liberated energies when bonds are formed between carbon atom and other atoms.

If carbon loses four electrons from the outer shell, it has to form C⁴⁺ ions. 

This requires huge amount of energy which is not available normally. 

Therefore C⁴⁺ formation is also a remote possibility. 

Carbon has to satisfy its tetravalency by sharing electrons with other atoms. 

It has to form four covalent bonds either with its own atoms or atoms of other elements.

(b) inflammable

(i) Slow eating of metals due to attack of atmospheric gases so as to convert the metal into its oxide, sulphide or carbonate etc. is called corrosion.

(ii) A protective Iayer is formed on its surface to prevent it from corrosion (Al₂O₃)

(iii) Formation of copper oxide on it from direct contact with air and moisture i.e., due to corrosion in Etectrolytic refining copper.

The Heterocyclic compound is Pyridine

(d) both (b) and (c).

Hydrocarbons: The compounds containing only carbon and hydrogen in their molecules are called hydrocarbons.

Alkenes: Hydrocarbons containing at least one double bond between carbon atoms are called alkenes.

A. (ii) 

B. (iii) 

C. (v) 

D. (i) 

E. (iv)

Alkanes: Hydrocarbons containing only single bonds between carbon atoms are called alkanes.

Correct option is  B) propene

Correct option is   B) RCH —CH₂

1. On adding carbonates and bicarbonates the compound containing carboxylic acid group evolves carbon dioxide gas. 

2. When warmed with alcohol and cone. H₂SO₄ a pleasant fruity smell is produced due to formation of ester.

Correct option is  A) Alkanes

CH₄ + Cl₂ \(\overset{Sunlight}{\underset{}{\longrightarrow}}\) CH₃Cl + HCl

CH₃Cl + Cl₂ \(\overset{Sunlight}{\underset{}{\longrightarrow}}\) CH₂Cl₂ + HCl

CH₂Cl₂ + Cl₂ \(\overset{Sunlight}{\underset{}{\longrightarrow}}\) CHCl₃ + HCl

CHCl₃ + Cl₂ \(\overset{Sunlight}{\underset{}{\longrightarrow}}\) CCl₄ + HCl

1. The compound is 2, 3-di ethylcycle hexan-1-ol. 

2. Alcohol (OH) is the functional group in the structure.

6 (YYrr, YYrr, yyRR, yyRr, YYrr, yyRr)

Alkanes are saturated hydrocarbons which always burn with a clean blue flame because complete combustion takes place insufficient oxygen to give CO₂ and H₂O with the liberation of a large amount of heat and light.

Same functional group, difference between successive members is a simple structural unit – CH₂

Chemical break down of a substance by bacteria, yeast or other microorganisms.

Decomposition of a compound on heating in the absence of air is called pyrolysis.

The hydrocarbon which is used in the artificial ripening of fruits is 

C₂H₄

Alcohol – OH, Aldehyde – CHO, Ketone – > C = O, Carboxylic acid (- GOOH), ester (-COOR), and amine – NH₂ are some important functional groups.

Mendel used the term ‘factor’ for the unit of heredity which is now called as gene.

HC ≡ CH ; σ bonds – 3 ; π bonds – 2

7 (YYrr, YYrr, yyRR, yyRr, YYrr, yyRr, yyrr)

Number of offsprings that are double recessive = 1 (yyrr)

Scientists and their contribution:

9 (YYRR, YYRr, YyRR, YyRr, YYRr, YyRr, YyRR, YyRr, YyRr)

Mendel selected garden pea plant (Pisum sativum) for his experiments because of the following characteristics:

i. The pea plant (Pisum sativum) is an annual plant with short life cycle.

ii. The flowers are bisexual and naturally self pollinating.

iii. They can be artificially cross-pollinated.

iv. The offsprings produced after cross pollination are fertile.

v. Pea plant has several pairs of contrasting characters.

vi. Flowers of pea plant are large enough for easy emasculation.

vii. It is a small herbaceous plant, so he could grow large number of plants.

Catalyst are substances that cause a reaction with a change in rate of reaction, without itself undergoing any change. 

Example: Micelle acts as a catalyst to convert unsaturated hydrocarbon into saturated hydrocarbon.

Correct answer is C.

Punnet Square (British geneticist, R.C. Punnet,1927) is a checkerboard used to show the result of a cross between two organisms.

(i) Hexane: C₆H₁₄

(ii) Benzene: C₆H₆

An element or group of elements which replaces one or more hydrogen (H) atoms from hydrocarbon, such that valency of carbon remains satisfied. 

Example: CH₄ ⎯→ CH₃ – OH 

Hence, —OH is a heteroatom.

lf ethanol reacts with ethanoic acid in presence of an acid, the ester is formed. 

The reaction is called esterification reaction.

Chemical equation:

CH₃OH+CH₃COOH+H⁺ →  CH₃COOCH₃+H₂O