1. Which of the following is a protein?
a) Natural rubber
b) Starch
c) Cellulose
d) None of these
Explanation: Natural rubber is a protein.
2. Wood is the main raw material for the manufacture of
a) Paint
b) Paper
c) Ink
d) Gun powder
Explanation: Wood is the main raw material for the manufacture of paper.
3. Rayon is chemically a
a) Cellulose
b) Pectin
c) Glucose
d) Amylase
Explanation: Rayon is chemically labelled cellulose acetate, which is a polymer of a semi-synthetic type. It is called semi-synthetic because it has a natural cellulose portion that in combination with acetate gives cellulose acetate (rayon).
4. Optical fibers are mainly used for which of the following?
a) Musical instruments
b) Food industry
c) Weaving
d) Communication
Explanation: Optical fibers are used most often as a means to transmit light between the two ends of the fiber and find wide usage in fiber-optic communications, where they permit transmission over longer distances and at higher bandwidths (data transfer rates) than electrical cables.
5. The major ingredient of leather is:
a) Collagen
b) Carbohydrate
c) Polymer
d) Nucleic acid
Explanation: Leather is a durable and flexible material created by tanning animal rawhide and skins. The major ingredient of leather is Collagen.
6. Which of the following shows the masses of the three elementary particles in decreasing order?
a) Leptons, Baryons, Mesons
b) Mesons, Baryons, Leptons
c) Baryons, Mesons, Leptons
d) Leptons, Mesons Baryons
Explanation: Baryons, Mesons, Leptons shows the masses of the three elementary particles in decreasing order.
7. What is the wavelength of visible spectrum?
a) 8500 - 9800 angstrom
b) 7800 - 8000 angstrom
c) 3900 - 7600 angstrom
d) 1300 - 3000 angstrom
Explanation: 3900 - 7600 angstrom is the wavelength of visible spectrum
8. Which of the following has a least penetrating power?
a) All have same penetrating power
b) Beta Particles
c) Alpha particles
d) Gamma rays
Explanation: Alpha is the least penetrating, while gamma is the most penetrating. Radiation can be harmful, but it can also be useful.
9. The isotope of uranium capable of sustaining chain reaction is
a) U-235
b) U-245
c) U-239
d) U-238
Explanation: The isotope of uranium capable of sustaining chain reaction is U-235.
10. The age of most ancient geological formations is estimated by
a) Ra - Si method
b) Potassium - argon method
c) C14 method
d) Uranium - lead method
Explanation: The Uranium Lead Method, also known as the U-Pb method, is one of the most ancient and reliable radiometric dating methods. It is used to date rocks and crystals that were formed more than a billion years ago. It has a range of dating samples that are about 1billion to 4.5billion years old. It has a precision rate of 0.1−1 percent.