Question 1. In a common dry cell, electrolyte is____.
(A) Manganese dioxide
(B) Ammonium chloride
(C) Sulphuric acid
Question 2. The energy, found in dry cell is_____.
Question 3. Which one of the following solutions of electrolytes is used in the car battery?
(A) Potassium nitrate
(B) Sulphuric acid
(C) Nitric acid
(D) Sodium sulphate
Question 4. Which one of the following pairs of materials serve as electrodes in chargeable batteries commonly used in devices such as torchlights, electric shavers etc.?
(A) Iron and Cadmium
(B) Lead peroxide and Lead
(C) Zinc and Carbon
(D) Nickel and Cadmium
Question 5. Which one of the following pairs is correctly matched?
(A) Ozone depletion – Skin cancer
(B) Methyl isocyanate – Acid rain
(C) Fluoride pollution – Bhopal gas
(D) Sulphur dioxide – Teeth
Question 6. In dry cell, which of the following are used as electrolytes?
(A) Ammonium Chloride and Calcium Chloride
(B) Magnesium Chloride and Zinc Chloride
(C) Sodium Chloride and Calcium Chloride
(D) Ammonium Chloride and Zinc Chloride
Question 7. Which one of the following is incorrect?
(A) Telephone was invented by Graham Bell
(B) Dry ice is nothing but solid Carbon dioxide
(C) The breaking apart of the nucleus of an atom is called fusion
(D) Theory of evolution was propounded by Charles Darwin
Question 8. Smokescreen is used in warfare for the purpose of concealment and camouflage. Smoke screens generally consists of fine particles of______.
(A) Magnesium oxide dispersed in air
(B) Titanium oxide dispersed in air
(C) Silver iodide dispersed in air
(D) Sodium chloride dispersed in air
Question 9. Liquid oxygen or liquid hydrogen is used technology in obtaining the industrial level called_____.
Question 10. Which one of the following concerns soil?
Question 11. Which chemical acts as a reclamation agent for alkaline soil?
(A) Calcium Carbonate
(B) Calcium Oxide
(C) Calcium Sulphate
(D) None of the above
Question 12. In India, water desalination plant is located in_____.
Question 13. Where was the first desalination plant in India to produced one lakhs litres fresh water per day based on low temperature thermal desalination principle commissioned?
(C) Port Blair
Question 14. Carbon Nanotubes (CNTs) were prepared by_____.
Question 15. When kept in air and darkness, which of the following elements glows spontaneously?
(A) Violet phosphorus
(B) Scarlet phosphorus
(C) White phosphorus
(D) Red phosphorus
Question 16. Which one of the following is used for manufacturing safety matches?
(A) Scarlet phosphorus
(B) Red phosphorus
(C) Black phosphorus
Question 17. Which of the following main elements is used in making matchbox?
Question 18. Which of the following pairs are not correctly matched?
(A) Uranium – Atom bomb
(B) Hydrochloric acid – Accumulate cell
(C) Manganese dioxide – Dry cell
(D) Potassium Chlorate – Matchbox
Question 19. Which one of the following colours is supplied by Sodium Chromate?
Question 20. ‘Red Ink’ is prepared from_____.
(B) Congo red
Question 21. Which is used in Dry Washing?
(A) All of these
Question 22. Chemically ‘Vermillion’ is_____.
(A) Sodium Chloride
(B) Mercuric Sulphide
(C) Potassium Nitrate
(D) Calcium Carbonate
Question 23. Which one of the following is not correctly matched?
(A) Zinc – Galvanization
(B) Silver – Electric bulb
(C) Uranium – Atom bomb
(D) Magnesium – Fireworks
Question 24. Which one of the following is called the ‘metal of future’?
Question 25. Methane is present in the atmosphere of______.
Question 26. A team of scientists at Brookhaven National Laboratory including those from India created the heaviest anti-matter (antihelium nucleus). What is/are the implication/implications of the creation of anti-matter?
- It will make mineral prospecting and oil exploration easier and cheaper.
- It will help the possibility of the existence of stars and galaxies made of anti-matter.
- It will help to understand the evolution of the universe.
Select the correct answer using the codes given below.
(A) 1, 2 and 3
(B) Only 3
(C) 2 and 3
(D) Only 1
Question 27. Match List-I with List-II and select the correct answer using the code given below the lists.
|(a) Iron||1. Photography|
|(b) Lead||2. Lightning conductor|
|(c) Silver||3. Haemoglobin|
|(d) Copper||4. Storage battery|
Question 28. Match List-I with List-II and select the correct answer using the code given below the lists.
|(a) Morphine||1. Antiseptic|
|(b) Sodium||2. Alloy|
|(c) Boric Acid||3. Analgesic|
|(d) German Silver||4. Kerosene oil|
Question 29. Match List-I with List-II and select the correct answer using the code given below the lists.
|(a) Skin Cancer||1.Chlorofluorocarbons|
|(b) Noise Pollution||2. Ultraviolet light|
|(c) Global Warming||3. Decibel|
|(d) Ozone Hole||4. Carbon dioxide|
Question 30. Match List-I with List-II and select the correct answer using the code given below the lists.
|(a) Acetone||1. Fire extinguisher|
|(b) Carbon Tetrachloride||2. Nail polish remover|
|(c) Hydrogen peroxide||3. Dressing of wounds|
|(d) Liquid ammonia||4. Refrigerant|
- Assertion (A): A dry cell cannot be charged.
- Reason (R): Dry cell has a reversible reaction.
(A) (A) is false, but (R) is true
(B) (A) is true, but (R) is false
(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
(D) Both (A) and (R) are true and (R) is the correct explanation of (A)
Question 32. Match List-I with List-II and select the correct answer using the code given below the lists.
|(a) Freon||1. Anti-knocking agent|
|(b) Tetra-ethyl-lead||2. Refrigerant|
|(c) Benzene hexachloride||3. Fire extinguisher|
|(d) Carbon tetrachloride||4. Insecticide|
Question 33. Match List-I with List-II and select the correct answer using the code given below the lists.
|List-I (Substances)||List-II (Applications)|
|(a) Aspartame||1. Synthetic rubber|
|(b) Freon||2. Anti-histamine|
|(c) Neoprene||3. Artificial Sweetener|
|(d) Benadryl||4. Refrigerant|
Question 34. Consider the following pairs. Commonly Unwanted or used/ controversial Consumed chemicals materials likely to be found in them:
- Lipstick – Lead
- Soft drinks – Brominated vegetable oils
- Chinese – Monosodium fast food glutamate
Which of the pairs given above is/ are correctly matched?
(A) 1, 2 and 3
(B) Only 1 and 3
(C) Only 2 and 3
(D) Only 1