Chemistry Questions and Answers For Competitive Exams – Part 1

Chemistry questions and answers are part of general science. These questions and answers are very important for all competitive exams and entrance tests. Chemistry questions and answers are the most important study material who are preparing for upcoming competitive exams. Chemistry general knowledge is extremely useful for all kinds of competitive exams like RRB, SSC, PSC, Bank, GATE, CAT, UPSC, PSU, Defence, and many more. Most of the chemistry questions asked in the bank and SSC exams. On this page, we are sorting some important helpful chemistry questions and answers for all aspirants. 

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Chemistry Questions and Answers For Competitive Exams

Q1. ________ is the major component of natural gas.

Q2. LPG is a mixture of __________.

Q3. Sulphur and Chlorine can have what type of a bond?

Q4. The common name of sodium tetraborate decahydrate is __________.

Q5. Which drug is used for Pain Relief?

Q6. Carnotite is an ore/mineral of _________.

Q7. Atomic Number of Hydrogen is _________.

Q8. Chemical properties of isotopes

Q9. The Chemical formula of Ammonium oxalate is _________.

Q10. Ozone is represented as _________.

Q11. The Chemical formula of Ammonium dichromate is

Q12. The common name of sulphur is

Q13. Plastic bottles are made of a polymer called PET. The expanded form of PET is

Q14. What is the net charge on Calcium fluoride?

Q15. Pentane has _________ structural isomers.

Q16. The mass of proton and mass of _________ is same.

Q17. Cinnabar is an ore/mineral of

Q18. The series of processes by which nitrogen and its compounds are inter-converted in the environment and in living organisms is called _________.

Q19. Covalent Bond is also called __________.

Q20. NaCl has ________.

Q21. _________ bond holds the atoms together within a water molecule.

Q22. Glass is also called __________.

Q23. Why is Carbon Monoxide a pollutant ?

Q24. In water treatment plant, use of chloramines ensures ___________

Q25. The common name of lead (II) sulphide is

Q26. What is formed when Carbon Dioxide is passed through Lime Water?

Q27. The Chemical formula of Urea is

Q28. Barium loses _________ electrons to achieve noble gas electron configuration.

Q29. What is the pH of water?

Q30. __________ gases absorb long wave (infrared) radiation from the earth and emit it again towards the earth.

Q31. Atomic explosion is triggered by

Q32. Nitrogen fixation is a process of

Q33. _________ decreases the rate of setting of cement.

Q34. The Chemical formula of Methanol is _________.

Q35. Binomial Nomenclature was founded by

Q36. The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 2nd group and the 4th period?

Q37. What is the other name of sodium carbonate?

Q38. Propyne and propene can be distinguished by

Q39. All phosphorus atoms have the same

Q40. Which molecule contains a polar covalent bond?

Q41. Atomic number is always equal to _________.

Q42. Who formulated ‘the atomic theory’ of a matter?

Q43. In general the largest component of bog soils is

Q44. What is the relative molecular mass of water?

Q45. What is the ratio of masses of hydrogen and oxygen in the water?

Q46. What is the pH value of human blood?

Q47. The atoms of the elements having same difference between mass number and atomic number are called ___________.

Q48. The Chemical formula of Cadmium nitrate is __________.

Q49. Alkenes were earlier known as __________.

Q50. The poisonous gas accidentally released in Bhopal Gas Tragedy is

Q51. Oxygen molecule is _________.

Q52. Solid carbon dioxide is known as __________.

Q53. The common name of hydrogen peroxide is

Q54. Beryl is an ore/mineral of

Q55. Why does carbon tetrachloride have no dipole moment?

Q56. The passage of an electric current through a conducting liquid causes 

Q57. What happens when one S and one P orbital is hybridized?

Q58. ___________ is a multibranched polysaccharide of glucose that serves as a form of energy storage in animals and fungi.

Q59. The reactions in which oxidation and reduction occur simultaneously are called

Q60. The Chemical formula of Aluminium Chloride is

Q61. A change in which one or more new substances are formed is called _________.

Q62. Vinegar and Baking Soda together produce ____________.

Q63. The Chemical formula of Acetic acid is __________.

Q64. Magnetite is an ore/mineral of

Q65. The maximum fixation of solar energy is done by

Q66. Benzene is _________ in ethyl alcohol.

Q67. Researchers at the University of Illinois have discovered new form of matter called Excitonium which was coined by ______ in the 1960’

Q68. _________ character of a bond between two atoms is greater if the difference in their electro negativities is lesser.

Q69. __________ is used for making chemical apparatus like beakers, flasks etc.

Q70. What is the full form of PVC?

Q71. Acid rain is caused due to pollution of atmosphere by

Q72. What is used to prevent freezing of fuel in space crafts?

Q73. A change in which no new substances are formed is called ___________.

Q74. Molybdenite is an ore/mineral of

Q75. Manganite is an ore/mineral of

Q76. Turquoise is an ore/mineral of

Q77. The conversion of hard water into soft water by boiling or adding calcium hydroxide is called

Q78. Bronze is an alloy of

Q79. Most liquids that conduct electricity are solutions of acids, bases and __________.

Q80. _________ is the fourth state of matter.

Q81. Who invented the modern periodic table?

Q82. Sphalerite is an ore/mineral of

Q83. The salt concentration (measured as salinity in parts per thousand), is _________ % in sea.

Q84. The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 3rd group and the 4th period?

Q85. The process of depositing a layer of any desired metal on another material by means of electricity is called ___________.

Q86. Magnesium oxide (MgO) + Water (H2O) = ?

Q87. What is dehydration?

Q88. Iron and manganese present as pollutants in water cannot be removed by ________

Q89. The elements known as primary nutrients for plants

Q90. According to Dalton’s Atomic Theory, the smallest indivisible particles of matter is called _________.

Q91. What happens in an oxidation reaction?

Q92. The Chemical formula of Ammonium chloride is ___________.

Q93. What chemical is injected into a person’s body when an ant bites?

Q94. The residual attractive or repulsive forces between molecules or atomic groups that do not arise from a covalent bond, or ionic bonds is called 

Q95. The reaction of Copper Sulphate and Iron produces Iron Sulphate and __________.

Q96. Electrons in the highest energy level of an atom are called _________.

Q97. Removal of carbon particles from air involves the principle of

Q98. What is the Greenhouse Effect?

Q99. What is the process of rust forming on iron called?

Q100. What is the base of the Octal Numeral System?

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