166 .A liquid initially contracts when cooled to 4Â°C but on further cooling down to 0Â°C, it expands. The liquid is:
167 .The phenomenon of electromagnetic induction implies a production of induced
168 .An artificial ecosystem is represented by-
169 .Metal tea pots have wooden handles because
170 .When a gas expands adiabactically
171 .In which Eco-system Grassland is included?
172 .All of the organisms living in a particular area make up _____.
173 .Fuse wire should have
174 .Which of the following property of sound is affected by change in air temperatue?
175 .In the nuclear reactors, moderators are used to:
176 .Dirty cloths containing grease and oil stains are cleaned by adding detergents to water. Stains are removed because detergent:
177 .A fuse is used in an electric circuit to-
178 .The bset conductor of heat among the following is-
179 .With the rise of temperature, the speed of sound in a gas
180 .An organism which can monitor air pollution is: