1. Which one of the following statements is correct?

2. A stainless steel chamber contains Ar gas at a temperature T and pressure P. The total number of Ar atoms in the chamber is n. Now Ar gas in the chamber is replaced by CO2 gas and the total number of CO2 molecules in the chamber is n/2 at the same temperature T. The pressure in the chamber now is P’. Which one of the following relations holds true? (Both the gases behave as ideal gases)

3. When applied to the affected area, which one of the following will relieve the pain due to ant-bite or bee-sting?

4. The molecular weight and equivalent weight of which one of the following is the same ?

5. Which of the following is the best example of the law of conservation of mass?

6. Which one of the following statements is not correct?

7. Which one of the following fertilizers has the maximum percentage of nitrogen ?

8. Consider the following equation for the formation of ammonia from nitrogen and hydrogen: N₂ + 3H₂ = 2NH₃ How many hydrogen molecules are required to react with 100 molecules of nitrogen?

9. Which one among the following is the correct order of reactivity of the elements?

10. What is the percentage of lead in lead pencil ?

11. A monatomic species that has 18 electrons and a net charge of 2^– has

12. The Poisonous nature of Carbon monoxide (CO) is due to its

13. The metal atom, which is present in superphosphate, is

14. What is the mass of one litre of cottonseed oil of density 926kg/m³

15. Alum is used as

16. Vinegar is the trade name of

17. The metal constituent of chlorophyll is

18. Chapter 14 Chemical Compounds (NDA GK Previous Papers Chapterwise) Consider the following statements :
1. An alloy is a mixture of two or more metals
2. An alloy is a mixture of a metal or metals with a nonmetal. Which of the statements given above is/are correct ?"

19. Which one of the following laws explains the formation of carbon monoxide and carbon dioxide from carbon and oxygen?

20. The metal compound commonly found in Sindhoor or Kumkum is based on

21. Which one of the following elements forms highest number of compounds?

22. Which of the following statements regarding heavy water are correct?
1. It is extensively used as a moderator in nuclear reactors
2. It cannot be used in exchange reaction to study reaction mechanism
3. Viscosity of heavy water is relatively smaller than that of ordinary water
4. The dielectric constant of heavy water is smaller than that of ordinary water Select the correct answer using the code given below:

23.

^Q57. Which one among the following is the equivalent weight of sulphuric acid ? (Atomic weight : H = 1, S = 32, O = 16)

24. Which one of the following is not contained in Portland cement ?

25. Match List-I with List-II and select the correct answer using the code given below the lists:List-I List-II
A. Ozone gas 1. Combines with haemoglobin
B. Nitrous oxide 2. Ultraviolet radiation
C. Carbon dioxide 3. Component of air in small quantity
D. Carbon monoxide 4. Visible radiation
5. Infrared radiationCode: A B C D