NDA Chemistry Questions with Answers - Download PDF

By Dhruv Kumar|Updated : January 23rd, 2023

In this article, we have provided some important NDA Chemistry Questions to prepare for the upcoming exam. The Chemistry section of the exam accounts for almost 15 questions out of the total 150 questions of the General Ability Test in the National Defence Academy and Naval Academy exams. So, it is important that one has a thorough preparation of NDA Chemistry questions of the last few years to understand the type of questions asked in the exam.

In this article, find the NDA Chemistry questions PDF in English and Hindi containing previous year questions that are often repeated in the exam with a slight modification. Aspirants are advised to go through these NDA Chemistry questions asked in the previous exams thoroughly and understand the basic concepts behind them for efficient exam preparation.

Table of Content

NDA Chemistry Questions

Those who are all set to appear for the NDA Exam on 16 April 2023 must check and download the NDA Chemistry Questions PDF with answers from the direct links below. Around 15 questions on NDA Chemistry are asked in the General Knowledge section of the GAT paper.

NDA Chemistry Questions with Answers PDF

In the following table, we are sharing important NDA Chemistry questions with answers PDF in Hindi and English. The following links contain NDA Chemistry questions PDFs in English & Hindi with detailed solutions.

NDA Chemistry QuestionsPDF
Chemistry Question PDF in EnglishDownload Here
Chemistry Question PDF in HindiDownload Here
Chemistry Question PDF in SolutionDownload Here

Important NDA Chemistry Questions

The following are some of the most important NDA Chemistry questions to prepare for the upcoming exam:

1. The majority charge carriers in a p-type semiconductor are

(a) free electrons
(b) conduction electrons
(c) ions
(d) holes

2. The ionization energy of hydrogen atom in the ground state is

(a) 13·6 MeV
(b) 13·6 eV
(c) 13·6 Joule
(d) Zero

3. When pure water boils vigorously, the bubbles that rise to the surface are composed primarily of

(a) air
(b) hydrogen
(c) hydrogen and oxygen
(d) water vapour

4. Which compound, when dissolved in water, conducts electricity and forms a basic solution?

(a) HCl
(b) CH3COOH
(c) CH30H
(d) NaOH

5. The principal use of Hydrofluoric acid is

(a) in etching glass
(b) as a bleaching agent
(c) as an extremely strong oxidizing agent
(d) in the preparation of strong organic fluorine compounds

6.The compound C6H1204 contains

(a) 22 atoms per mole
(b) twice the mass percent of H compared to the mass percent of C
(c) six times the mass percent of C compared to the mass percent of H
(d) thrice the mass percent of H compared to the mass percent of 0

7. The proposition 'equal volumes of different gases contain equal numbers of molecules at the same temperature and pressure' is known as

(a) Avogadro's hypothesis
(b) Gay-Lussac's hypothesis
(c) Planck's hypothesis
(d) Kirchhoff's theory

8. Which of the following statements about magnetite ore of iron is/are correct?
1. It is known as black ore.
2. It contains 60% to 70% of pure iron.
3. It possesses magnetic properties.
Select the correct answer using the codes given below:

(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

9. Which one of the following vitamins has a role in blood clotting?

(a) Vitamin A
(b) Vitamin D
(c) Vitamin E
(d) Vitamin K

10. How much C02 is produced on heating of 1 kg of carbon?

(a) 11/3 kg
(b) 3/11 kg
(c) 4/3 kg
(d) ¾ kg

11. Zinc is used to protect Iron from corrosion because zinc is

(a) more electropositive than iron
(b) cheaper than iron
(c) a bluish-white metal
(d) a good conductor of heat and electricity

12. Which one of the following is a chemical change?

(a) Cutting of hair
(b) Greying of hair naturally
(c) Swelling of resin in water
(d) Cutting of fruit

13. Which one among the following chemicals is used in washing soda?

(a) Calcium carbonate
(b) Calcium bicarbonate
(c) Sodium carbonate
(d) Sodium bicarbonate

14. Why is potassium permanganate used for purifying drinking water?

(a) It kills germs
(b) It dissolves the impurities
(c) It is a reducing agent
(d) It is an oxidizing agent

15. Which one of the following is a cause of acid rains?

(a) Ozone
(b) Ammonia
(c) Sulphur dioxide
(d) Carbon monoxide

16. The desirable range of pH for drinking water is

(a) 6·5 to 8·5
(b) 5·0 to 6·5
(c) 6·5 to 7·0
(d) 7·0 to 8·5

17. Consider the following reaction:
CH4 + 2O2 -------> CO2 + 2H2O
Which of the following about the reaction given above is/are correct?
1. Carbon is oxidized
2. Hydrogen is oxidized
3. Hydrogen is reduced.
4. Carbon is reduced
Select the correct answer using the code given below:

(a) 1 only
(b) 1 and 2 only
(c) 2 and 3 only
(d) 2 and 4 only

18. The accidental touch of Nettle leaves creates a burning sensation, which is due to injecting of

(a) Hydrochloric acid
(b) Methanoic acid
(c) Citric acid
(d) Sulphuric acid

19. Which of the following properties is true for toothpaste?

(a) It is acidic
(b) It is neutral
(c) It is basic
(d) It is made up of Calcium phosphate, the material of tooth enamel

20. Which one of the following gives the highest amount of hydrogen ions (H+)?

(a) Sodium hydroxide solution
(b) Milk of magnesia
(c) Lemon juice
(d) Gastric juice

21. Brine is an aqueous solution of

(a) NaCl
(b) NaOH
(c) NaHCO3
(d) Na2CO3

22. Which one of the following is the chemical formula of Washing Soda?

(a) NaHCO3
(b) Na2CO3.10H2O
(c) Na2CO3.5H2O
(d) NaOH

23. Which one of the following is not true for bleaching powder?

(a) It is used as a reducing agent in chemical industries
(b) It is used for bleaching wood pulp in paper factories
(c) It is used for disinfecting drinking water
(d) It is used for bleaching linen in the textile industry

24. Which of the following statements about latent heat for a given substance is/are correct?
1. It is fixed at a given temperature
2. It depends upon the temperature and volume
3. It is independent of temperature and volume
4. It depends on the temperature but is independent of volume
Select the correct answer using the code given below:

(a) 2
(b) 1 and 3
(c) 4 only
(d) 1 and 4

25. Which one of the following statements about the mass of a body is correct?

(a) It changes from one place to another
(b) It is the same everywhere
(c) It depends on its shape
(d) It does not depend on its temperature

26. Which one of the following is the number of water molecules that share with two formula unit CaSO4 in Plaster of Paris?

(a) One
(b) Two
(c) Five
(d) Ten

27. How is Carbon Black obtained?

(a) By heating wood at high temperature in absence of air
(b) By heating coal at high temperature in absence of air
(c) By burning hydrocarbons in a limited supply of air
(d) By heating coal at high temperature in presence of air

28. Which one of the following properties is NOT true for Graphite?

(a) Hybridisation of each carbon atom is sp3
(b) Hybridisation of each carbon atom is sp2
(c) Electrons are delocalized over the whole sheet of atoms
(d) Each layer is composed of hexagonal rings

29. Which one of the following is the purest form of Carbon?

(a) Charcoal
(b) Coke
(c) Fullerene
(d) Carbon Black

30. The poisonous nature of Carbon Monoxide (CO) is due to its

(a) insolubility in water
(b) ability to form a complex with haemoglobin
(c) ability to reduce some metal oxides
(d) property of having one stigma bond

31. Which of the following statements about specific of a body is/are correct?
1. It depends upon mass and shape of the body
2. It is independent of mass and shape of the body
3. It depends only upon the temperature of the body
Select the correct answer using the code given below:

(a) 1 only
(b) 2 and 3
(c) 1 and 3
(d) 2 only

32. Which one of the following alkali metals has the lowest melting point?

(a) Sodium
(b) Potassium
(c) Rubidium
(d) Caesium

33. Which one of the following metals is alloyed with sodium to transfer heat in a nuclear reactor?

(a) Potassium
(b) Calcium
(c) Magnesium
(d) Strontium

34. Which one of the following metals is used in the filaments of photo-electric cells that convert light energy into electric energy?

(a) Tungsten
(b) Copper
(c) Rubidium
(d) Aluminium

35. 2 statements are given in the question. Examine these 2 statements carefully and select the answers based on the options that follow:
Statement I: Petroleum is a mixture of many different hydrocarbons of different densities.
Statement II: The grade of Petroleum depends mainly on the relative proportion of the different hydrocarbons.

(a) Both the statements are individually true & Statement II is the correct explanation of Statement I.
(b) Both the statements are individually true, but Statement II is not the correct explanation of Statement I.
(c) Statement-I is true, but Statement II is false
(d) Statement-I is false, but Statement II is true

36. The phosphorus used in the manufacture of safety matches is

(a) Red phosphorus
(b) Black phosphorus
(c) White phosphorus
(d) Scarlet phosphorus

37. Which one of the following is not a chemical change?

(a) Ripening of fruits
(b) Curdling of milk
(c) Freezing of water
(d) Digestion of food

39. One of the main causes of air pollution in cities is emissions from vehicles like cars and trucks. Cars emit various pollutants which are bad for human health when inhaled, like
1. Nitrogen oxides (NOx)
2. Carbon Monoxide (CO)
3. Carbon dioxide (CO2)
4. Benzene

(a) 1 & 4 only
(b) 1 & 2 only
(c) 1, 2 & 3 only
(d) 1, 2 7 4 only

40. Soap is a sodium or potassium salt of?

(a) Stearic acid
(c) Oleic acid
(c) Palmitic acid
(d) All of the above

41. Anatom of carbon has 6 protons. Its mass number is 12. How many neutrons are present in an atom of carbon?

(a) 12
(b) 6
(c) 10
(d) 14

42. Which one of the following is a reduction reaction?

(a) 2 Mg (s) + O2 (g) ----> 2 MgO (s)
(b) S (s) + O2 (g) ----> SO2 (g)
(c) 2 HgO (s) + Heat -------> 2 Hg (l) + O2 (g)
(d) Mg (s) + S (s) -------> MgS (s)

43. Which of the following commonly used household item(s) release Bisphenol A (BPA) which is an endocrine disruptor and bad for human health?
1. Steel utensils
2. Plastic coffee mugs
3. Aluminium utensils
4. Plastic water storage bottles
Select the correct answer using the code given below:

(a) 1 only
(b) 1 and 2 only
(c) 2 and 4 only
(d) 1, 2 and 3 only

44. Which one of the following oxides of nitrogen is known as ‘anhydride’ of nitric acid?

(a) N2O
(b) N2O3
(c) NO2
(d) N2O5

45. Which one of the following is the chemical name of baking soda?

(a) Sodium bicarbonate (Sodium hydrogen carbonate)
(b) Sodium carbonate
(c) Potassium bicarbonate (Potassium hydrogen carbonate)
(d) Potassium carbonate

Also Check:

Comments

write a comment

FAQs on NDA Chemistry Questions

  • Chemistry questions are asked in General Science section of NDA GAT paper. This section usually accounts for 10-12 question in NDA exam.

  • For NDA Chemistry questions, 9th and 10th class NCERT are enough, but maybe there could be a few topics of chemistry that could be covered through the 11th class NCERT.

  • For NDA chemistry you need to prepare topics such as Alkanes, Alkenes, Alkynes, Basic Principles and Techniques of Organic Chemistry done well which you can clear the further chapters Haloalkanes, Haloarenes, Nitrogen Compounds, Alcohols Phenol, and Ethers, etc.

  • The NDA Chemistry section of the exam consists of 15 questions that total up to 60 marks under the General Ability Test. You can prepare NDA chemistry questions through NCERTs and the material available in the market.

NDA & Other Exams

NDAAir ForceIndian NavySSC OfficerCoast GuardOther ExamsMock TestPracticeOnline Course

Follow us for latest updates