Chemistry Multiple choice questions(50) with answer
- 2. Q 1 Who is regarded as father of modern chemistry ? • Ruterford • Einstein • Lavoisier • C.V Raman Answer: Lavoisier
- 3. Q2. Identify the wrong statement in the following? • Atomic radius of the elements increases as one moves down the first group of the periodic table • Atomic radius of the elements decreases as one moves across from left to right in the 2nd period of the • Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius • Amongst isoelectronic species, greater the negative charge on the anion, larger is the ionic radius Answer: Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius
- 4. Q3. The term PVC used in the plastic industry stands for • Polyvinyl chloride • Polyvinyl carbonate • Phosphor vanadiu chloride • Phosphavinyl chloride Answer: Polyvinyl chloride
- 5. Q4. The number of moles of solute present in 1 kg of a solvent is called its • Molality • Molarity • Normality • Formality Answer: Molality
- 6. Q5. The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called • Granite • Basalt • Igneous rocks • Sedimentary rocks Answer: Igneous rock
- 7. Q6. The octane number of zero is assigned to • 2- methyl octane • N- heptane • Iso- octane • 3- methyl octane Answer: n-heptane
- 8. Q7. Which is used in preparation of dynamite ? • Glycerol • Ethyl alochol • Methyl alcohol • Glycol Answer: Glycerol
- 9. Q8. Bleaching action of chlorine is by • Decomposition • Gydrolysis • Reduction • Oxidation Answer: Decomposition
- 10. Q9. What is a mixture of potassium nitrate powdered charcoal and sulphur called? • Paint • Aluminium • Brass • Gun powder Answer: Gun powder
- 11. Q10. Nail polish remover contains ? • Benzene • Acetic acid • Acetone • Petroleum ether Answer: Acetone
- 12. Q11. The isotope atoms differ in ? • Number of protons • Atomic number • Number of electrons • Atomic weight Answer: number of electrons
- 13. Q12. Natural rubber is polymer derived from ? • Ethylene • Propylene • Isoprene • Butadiene Answer: isoprene
- 14. Q13. Which is also called Stranger Gas ? • Xenon • Neon • Argon • Nitrous oxide Answer: Xenon
- 15. Q14. The chemical used as a fixer in photography is ? • Sodium thio sulphate • Sodium sulphate • Borax • Ammonium sulphate Answer: sodium thio sulphate
- 16. Q15. Water drops are spherical because of ? • Viscosity • Density • Polarity • Surface tension Answer: surface tension
- 17. Q16. he oxide of Nitrogen used in medicine as anaesthetic is ? • Nitrogen pentoxide • Nitrous oxide • Nitric oxide • Nitrogen dioxide Answer: nitrogen pentoxide
- 18. Q17. Which one of the following metals does not react with water to produce Hydrogen? • Cadmium • Lithium • Potassium • Sodium Answer: cadmium
- 19. Q18. The most electronegative element among the following is • Sodium • Bromine • Fluorine • Oxygen Answer: fluorine
- 20. Q19. The metal used to recover copper from a solution of copper sulphate is ? • Na • Ag • Hg • Fe Answer: Fe
- 21. Q20 The metallurgical process in which a metal is obtained in a fused state is called ? • Roasting • Calcinations • Smelting • Froth floatation Answer: smelting
- 22. Q21. Which of the following is produced during the formation of photochemical smog ? • Nitrogen oxides • Hydrocarbons • Methane • Ozone Answer: ozone
- 23. Q22. Which of the following gas is used in cigarette lighters ? • Butane • Propane • Methane • Ethane Answer: butane
- 24. Q23. Iodine can be separated from a mixture of Iodine and Potassium Chloride by ? a) Filtration b) Sublimation c) Distillation d) Sedimentation Answer: sublimation
- 25. Q24. The material which can be deformed permanently by heat and pressure is called a • Thermoset • Thermoplastic • chemical compound • Polymer Answer: thermoset
- 26. Q25. . Conduction band electrons have more mobility than holes because they are • experience collision more frequently • experience collision less frequently • have negative charge • need less energy to move them Answer: experience collision less frequently
- 27. Q26. The gas used for artificial ripening of green fruit is ? • Ethane • Ethylene • carbon dioxide • Acetylene Answer: ethylene
- 28. Q27. The main chemical constituent of clay is ? • aluminium silicate • Zeolites • aluminium borosilicate • silicon oxide Answer: aluminium silicate
- 29. Q28. What is hottest part of the gas flame is called ? • blue zone • luminous zone • dark zone • non-luminous zone Answer: non-luminous zone
- 30. Q29. Permanent hardness of water is due to the presence of ? • Magnesium bicarbonate • Calcium bicarbonate • Sodium bicarbonate • Calcium sulphate Answer: Calcium sulphate
- 31. Q30. Sugars are converted in the liver into • Glycogen • Vitamin • Monosaccharide • None of above Answer: glycogen
- 32. Q31. The ejection of electrons when a metal surface is irradiated is known as • Black body radiation • Photoelectric effect • Zeeman effect • Atomic spectrum Answer: photoelectric effect
- 33. Q32. Which of the following gases is the most toxic? • Carbon dioxide • Sulphur dioxide • Carbon monoxide • Acetic acid Answer: carbon monoxide
- 34. Q33. Which of the following elements behave chemically both as a metal and a non metal? • Boron • Carbon • Argon • Mercury Answer: boron
- 35. Q34. Why is phosphorus kept under water ? • to make it wet • to make it durable • water forms a protective coating on it • to save it from catching fire when exposed to dry air Answer : to save it from catching fire when exposed to dry air
- 36. Q35. What is extracted from Bauxite ? • Mica • Aluminium • Copper • Tin Answer: aluminium
- 37. Q36. Brass is an alloy of ? • Copper and Tin • Copper and Zinc • Copper and Aluminium • Iron and Copper Answer: copper and zinc
- 38. Q37. Contact lenses are made from ? • Polyvinyl chloride • Teflon • Polystyrene • Lucite Answer: Polyvinyl chloride
- 39. Q38. The single acid which dissolves gold is ? • Aqua regia • Hydrochloric acid • Nitric acid • Selenic acid Answer: aqua regia
- 40. Q40. How many different oxides are formed by nitrogen ? • Two • Three • Four • Five Answer: two
- 41. Q41. The major component used in preparation of different types of glasses is : • Sodium borate • Sodium silicate • Silica • Calcium silicate Answer: silica
- 42. Q42. What is metallurgy ? • process of extracting metal in pure form from its ore. • process of creating alloys of metals. • process of making metals live long. • None of above. Answer: process of extracting metal in pure form from its ore
- 43. Q42. Which have maximum number of isotopes ? • Bromine • Aluminium • Polonium • Carbon Answer: polonium
- 44. Q43. Which prefix is often used with scientific terms to indicate that something is the same, equal or constant • Iso • Mega • Meta • Quasi Answer: iso
- 45. Q44. Superconductivity is a material property associated with • cooling a substance without a phase change • frictionless liquid flow • a loss of thermal resistance • a loss of electrical resistance Answer: a loss of electrical resistance
- 46. Q45. Which of the following is primarily composed of calcium carbonate? • Fish scales • Shark teeth • Oyster Shells • Whale bones Answer: oyster shells
- 47. Q46. Water flows through a horizontal pipe at a constant volumetric rate. At a location where the cross sectional area decreases, the velocity of the fluid • Increases • Decreases • Stays the same • None of the above Answer: increases
- 48. Q47. Vacuoles are bound by a definite membrane in plant cells called • Plasma membrane • Tonoplast • Cell wall • None of the above Answer: Tonoplast
- 49. Q48. The wonder pigment chlorophyll is present in • Mitochondria • Centrosomes • Quantosomes • Lysosomes Answer: Quantosomes
- 50. Q49. The concept of carbon credit originated from which one of the following? • Earth Summit, Rio de Janeiro • Kyoto Protocol • Montreal Protocol • G-8 Summit, Hciligendamm Answer: Kyoto protocol
- 51. Q50. Select the one which is not a mixture • Air • Gasoline • LPG • Distilled water Answer: distilled water