Answer: Option B. -> Nickel-cadmium cell
NICKEL-CADMIUM CELL IS AN EXAMPLE OF SECONDARY BATTERY. IT HAS LONGER LIFE THAN THE LEAD STORAGE CELL BUT MORE EXPENSIVE TO MANUFACTURE.

Answer: Option D. -> Dimethylacetylene
DIMETHYLACETYLENE IS THE COMMON NAME OF BUT-2-YNE. ETHYLACETYLENE IS THE COMMON NAME OF BUT-1-YNE. METHYLACETYLENE IS THE COMMON NAME OF PROPYNE. ACETYLENE IS THE COMMON NAME OF ETHYNE.

Answer: Option C. -> Both a and b
THE IONS OF STRONG ELECTROLYTES ARE GOOD CONDUCTORS OF ELECTRICITY IN THE SOLUTION. THE MOLAR CONDUCTIVITY IN CASE OF STRONG ELECTROLYTES INCREASES SLOWLY WITH DILUTION.

Answer: Option B. -> Methane
METHANE IS A SATURATED HYDROCARBON. ITS CHEMICAL FORMULA IS CH4. IT IS THE MAIN CONSTITUENT OF NATURAL GAS. ALSO, REFINED LIQUID METHANE IS USED AS A ROCKET FUEL. USE OF METHANE BASED ROCKET IS CURRENTLY IN TREND AND SPACEX USES PURE METHANE. PROPANE HAS INHERENT PROPERTIES SUCH AS LARGE MASS AND NEED OF VERY LOW COOLING POINT DUE TO WHICH IT IS NOT USED AS ROCKET FUEL.

Answer: Option A. -> They are also called as Arenes
AROMATIC HYDROCARBONS ARE NON- POLAR MOLECULES AND ARE USUALLY COLOURLESS LIQUIDS OR SOLIDS WITH A CHARACTERISTIC AROMA. AROMATIC HYDROCARBONS ARE IMMISCIBLE WITH WATER BUT ARE READILY MISCIBLE WITH ORGANIC SOLVENTS. AROMATIC HYDROCARBONS ARE ALSO KNOWN AS ARENES.

Answer: Option B. -> Ethyne
ON INDUSTRIAL SCALE, ETHYNE IS PREPARED BY TREATING CALCIUM CARBIDE WITH WATER. CALCIUM CARBIDE IS PREPARED BY HEATING QUICK LIME WITH COKE.

Answer: Option B. -> PHBV
PHBV IS A COPOLYMER OF 3 – HYDROXY BUTANOIC ACID, AND (3 – HYDROXYPENTANOIC ACID). IT IS USED IN CONTROLLED DRUG RELEASE IN THE BODY AS THE DRUG PUT IN PHBV CAPSULE IS RELEASED AFTER THIS POLYMER IS DEGRADED BY ENZYMATIC ACTION.

Answer: Option A. -> Water gas
WATER GAS IS A MIXTURE OF CARBON MONOXIDE AND HYDROGEN. SEMI-WATER GAS IS A MIXTURE OF WATER GAS AND PRODUCER GAS MADE BY PASSING A MIXTURE OF AIR AND STEAM THROUGH HEATED COKE.

Answer: Option A. -> Aluminium
ANODISING IS A PROCESS OF FORMING A THICK OXIDE LAYER OF ALUMINIUM. ALUMINIUM DEVELOPS A THIN OXIDE LAYER WHEN EXPOSED TO AIR. THIS LAYER OF ALUMINIUM OXIDE MAKES ALUMINIUM RESISTANT TO FURTHER CORROSION.

Answer: Option A. -> PLA
PLA, ALSO KNOWN AS POLYACTIC ACID, IS OBTAINED BY POLYMERIZATION OF THE DIMER OF LACTIC ACID. IT IS ALSO PRODUCED BY MICRO BIOLOGICAL SYNTHESIS OF LACTIC ACID FOLLOWED BY THE POLYCONDENSATION AND REMOVAL OF WATER BY EVAPORATION.