This is the Part #1 of our Chemistry MCQs section. There are few other parts and each one contain 40 Chemistry MCQs. You can answer first and check your answers at the end of the page.
1. Which one of the following substances can not be used as a dielectric substance in a capacitor?
- Piece of mica
- A paper strip
- Ceramic slab
- Copper strip
2. In atoms that are isotopes,
- The atomic number is different
- The number of electrons are different
- The number of neutrons are different
- The number of protons are different
3. The elements that cannot displace lead from a lead nitrate solution,
- Copper
- Zinc
- Magnesium
- Iron
4. Which statement is false about complete combustion of a fuel?
- All the energy of reactants is released
- No soot is formed
- Carbon dioxide and water are the products
- Produces a flame of yellow color
5. Which one of the following is an inflammable gas?
- Oxygen
- Hydrogen
- Nitrogen
- Ammonia
6. When an object floats in water,
- It’s weight is equal to the upthrust
- It’s density is more than that of water
- It’s volume is equal to the weight of water displaced
7. Which one of the following is a heat insulator?
- Brass
- Copper
- Rubber
- Steel
8. The foam fire extinguisher is most suitable to extinguish a fire concerning,
- Gases
- Oil
- Electricity
- Buildings
9. Which one of the following solutions can have a pH value of 14?
- Sodium chloride
- Ethyl alcohol
- Potassium hydroxide
- Hydrochloric acid
10. Which one of the following statements is false?
- From top to bottom in a group the atomic radius increases
- The elements of group 4 make co-valent bonds
- Going from left to right along a period in the periodic table, the electronegativity of elements increases
- The reactivity of elements increases from top to bottom in all groups of elements
11. The element that cannot displace lead, from lead nitrate solutions is,
- Zinc
- Iron
- Magnesium
- Copper
12. Which one of the following is an endothermic reactions?
- Dissolving sodium chloride in water
- Dissolving calcium oxide in water
- Reaction of hydrochloric acid with sodium hydroxide
- Dissolving ammonium chloride in water
13. Which is not polar organic solvent?
- Acetone
- Methanol
- Hexane
- Ethanol
14. Monosodium glutamate is a food additive, it serves as a,
- Coloring
- Bleaching agent
- Flavoring
- Preservative
15. What statement is false about sodium?
- Sodium gives a bright yellow color to a flame
- Sodium reacts rapidly with cold water
- Sodium forms a basic oxide when heated in air
- Sodium oxide forms an acidic solution with water
16. In vulcanizing of rubber, heat is applied to raw rubber mixed with,
- Zinc
- Carbon
- Sulphur
- Phosphorus
17. The main raw material used in the cement industry?
- Limestone & salt
- Limestone & clay
- Quick lime & marble
- Gypsum & clay
18. The acid used in the production of bleaching powder is,
- Acetic acid
- Citric acid
- Hydrochloric acid
- Sulphuric acid
19. A metal that is able to displace lead from a lead nitrate solution is,
- Mercury
- Copper
- Iron
- Silver
20. Isotopes of same element do not have,
- Equal atomic numbers
- Equal numbers of electrons
- Equal numbers of protons
- Equal numbers of neutrons
21. A covalent double bond exists between,
- Two Nitrogen atoms
- Two Chlorine atoms
- Two Carbon atoms
- Two Oxygen atoms
22. The group of elements which are bivalent,
- B, Al, C, Ag
- C, Si, I, Br
- Ca, O, Mg, Be
- Na, Cl, K, Li
23. Iron can be given anodic protection by keeping iron in contact with,
- Zinc
- Magnesium
- Tin
- Aluminum
24. Which one of the following is a non polar organic solvent?
- Acetone
- Benzene
- Methanol
- Ethanol
25. The element used in the process of vulcanizing of rubber,
- Carbon
- Nitrogen
- Suplhur
- Silicon
26. All members of the noble gas family are monoatomic. Which one of the following explains best?
- They are found in minute quantities in the atmosphere
- They are all inert gasses
- They do not react with other elements
- They all have a complete outer energy level
27. Sea water is a mixture of many salts. The highest percentage is of,
- Calcium sulphate
- Magnesium chloride
- Potassium sulphates
- Sodium chloride
28. Select the correct order of formulate for the following “Quick lime, slaked lime, lime stone, lime water”,
- CaO, CaCO3, Ca(OCl)2, CaO
- Ca(OH)2, CaCO3, CaO, Ca(OH)2
- CaO, Ca(OH)2, CaCO3, Ca(OH)2
- CaCO3, CaO, Ca(OH)2, Ca(OCl)2
29. Antacids are used to reduce discomfort in the stomach. Which one of the following is no used as an antacid?
- Aluminum hydroxide
- Magnesium hydroxide
- Sodium sulphate
- Magnesium carbonate
30. The elements of the same period of the periodic table possess,
- Equal numbers of neutrons
- Equal numbers of electrons
- Equal numbers of energy levels
- Equal numbers of protons
31. Which one of the following fuels do not produce pollutants?
- Diesel
- Petrol
- Hydrogen
- Methane
32. The most electro negative element out of the following is,
- Cs
- H
- I
- F
33. Which one of the following is a scaler quantity?
- Weight
- Force
- Mass
- Acceleration
34. Which one of the following metals is most suitable for sacrificial protection of iron pipe lines?
- Sodium
- Copper
- Magnesium
- Lead
35. The gas used as a blanketing gas in the storing equipments is,
- Hydrogen
- Chlorine
- Oxygen
- Nitrogen
36. Which one of the following is an acidic salt?
- Na, CO3, 10H2O
- NaHSO4
- KCl
- Na2SO4
37. A property that is not improved in rubber in vulcanizing,
- High resilient properties
- Improves electrical insulating properties
- High water absorptive properties
- Higher resistance to wear and tear
38. A common constituent of most antacids is,
- Hydrochloric acid
- Sodium Chloride
- Sodium Hydroxide
- Magnesium carbonate
39. When carbon dioxide is passed through lime water it turns milky. When excess of carbon dioxide is passed lime water turns colorless. What is the product that causes the colorless stage?
- Calcium oxide
- Calcium hydroxide
- Calcium carbonate
- Calcium bicarbonate
40. A group of substances have the following properties,
– A characteristic bitter taste
– A soapy touch
– Turns red litmus blue
– Conducts electricity in aqueous solution
- Salts
- Acids
- Bases
- Nuetral