1. In which hydrocarbon all the four valencies of carbon are linked together with single bond?
A. Alkanes
B. Alkenes
C. Alkynes
D. None of the above
ANSWER:A.Alkanes
SOLUTION :Hydrocarbons in which all the valencies of carbon atoms are fully utilized by single covalent bonds are known as saturated hydrocarbons. e.g. Alkanes (methane, ethane, propane etc.)
2. What alkanes are known as saturated hydrocarbon?
A. It consists of triple bond
B. It consists of double bond
C. It consists of single bond
D. None of the above
ANSWER:C.It consists of single bond
SOLUTION:Alkanes are saturated hydrocarbons. This means that contain only carbon and hydrogen atoms bonded by single bonds only. The general formula for an alkane is CnH2n+2. In this formula, n, is the number of carbon atoms in the molecule.
3. L.P.G is a hydrocarbon consisting of a mixture of ___________.
A. Methane and Butane
B. Propane and Butane
C. Ethane and Propane
D. Ethane and Butane
ANSWER : B.Propane and Butane
SOLUTION: Liquefied petroleum gas (LPG) is a flammable mixture of hydrocarbon gases, mainly propane and butane. It can also contain small amounts of other hydrocarbons, such as n-butane, isobutane, propylene, and butylene. LPG is derived from refinery processes, natural gas processing, and cracking processes of higher hydrocarbons.
4. Which among the following minerals is also known as horn Silver?
A. Silver Iodile
B. Silver Chroride
C. Zinc Phosphate
D. Silver Sulphide
ANSWER:B.Silver Chroride
SOLUTION: Silver chloride is a chemical compound with the chemical formula AgCl is also called as Horn Silver. It is also called as cerargyrite. It is a gray, very heavy halide mineral and an ore of silver.
5. Which among the following can be used as a preservative in Tomato Juice?
A. Sodium Chloride
B. Sodium carbonate
C. Sodium benzoate
D. Sodium Lauri
ANSWER: C.Sodium benzoate
SOLUTION:Typically, sodium benzoate and/or potassium sorbate are the preservatives that are used in juices.
6. Cassiterite is an ore of which of the following?
A. Iron
B. Zinc
C. Copper
D. Tin
ANSWER:D.Tin
SOLUTION: Cassiterite or tinstone is an ore of tin containing SnO2.
7. Which among the following is Quick Silver?
A. Alumnium
B. Mercury
C. Lead
D. Zinc
ANSWER: B.Mercury
SOLUTION :
Mercury is known as quicksilver because of its fast molecular motion and mobility.
8. Which of the following group characterizes alcohols?
A. OH group
B. COOH group
C. COO group
D. CO group
ANSWER: A.OH group
SOLUTION: Alcohols are those organic compounds which are characterized by the presence of one, two or more hydroxyl groups (−OH) that are attached to the carbon atom in an alkyl group or hydrocarbon chain.
9. Which among the following is the objective of the Methyl tert- butyl either (MTBE) mixing with Petroleum?
A. Raise Octane Number
B. Antioxidant Stabilizer
C. Lead Scavanger
D. Fuel Dye
ANSWER:A.Raise Octane Number
SOLUTION:Primarily used as a fuel additive, MTBE is blended into gasoline to increase its octane rating and knock resistance, and reduce unwanted emissions.
10. Which of the following is an anti –knocking compound that has been phased out in many countries so far?
A. Lead tetrachloride
B. Tetra Ethyl Lead
C. Ethyl acetate
D. Ethanol
ANSWER:B.Tetra Ethyl Lead
SOLUTION:
Tetra Ethyl Lead (TEL) had been blended with gasoline since the early 1920s.