Chemistry-Objective Related Question Answers
101. The formation of a compound by the union ; of elements is called?
Synthesis Examples: Water; Steam; Salt etc. .
102. The recently discovered chemical compound for the treatment of cancer?
Cisplatin
103. The element which forms largest number of compounds?
Carbon
104. The second element which forms largest number of compounds?
Hydrogen
105. Two or more substances (elements or compounds or both) that do not combine chemically during the mixing?
Mixtures
106. The two kinds of mixtures are:?
Heterogeneous mixture and Homogeneous mixture
107. A mixture of two faces of the matter is called?
Colloid Eg : Emulsion; Aerosols; Fog; Mt1k
108. A colloidal solution formed between two liquids is called?
Emulsion
109. A colloid formed between gas particles and liquid or solid particles?
Foam
110. Colloid which contains particles of liquid or solid dispersed in gas?
Aerosol
111. Atoms of the same element having same atomic number and different mass number are known as?
Isotopes
112. Isotope was discovered by?
Frederick Soddy
113. Which isotope is used to determine the age of fossils ?
Carbon 14 $
114. Which isotope is used for the treatment of cancer ?
Cobalt60$
115. Which isotope is used for the treatment of skin cancer ?
Phosphorous 32
116. Which isotopes are used as medicine?
Oxygen 15; Iodine - 131
117. Isotopes differ in the number of?
Neutrons
118. The isotopes of hydrogen are?
Protium; Deuterium; Tritium
119. Elements having same mass number and different atomic number are known as?
Isobars Eg: calcium – 40; Argon - 40
120. The term Isobars was suggested by?
Alfred Walter Stewart
121. Atoms of elements having same number of neutrons are called?
Isotones eg : Helium
122. The term Isotones was formed by?
K.Guggenheimer
123. Compounds with same molecular formula but different structures are known as?
Isomers Eg: Glucose
124. Different forms of the same element with different physical appearances are known as?
Allotropes Eg: Diamond; Graphite and Charcoal are the allotropes of Carbon
125. The allotrope of Oxygen?
Ozone
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