Q.1
Soap is a mixture of sodium or potassium salts of
Q.2
Glass is made of the mixture of:
Q.3
The type of glass used in making lenses and prisms is
Q.4
Which of the following is a protein?
Q.5
Wood is the main raw material for the manufacture of
Q.6
Who suggested that most of the mass of the atom is located in the nucleus?
Q.7
The dark lines in the solar spectrum are due to
Q.8
Which type of fire extinguisher is used for petroleum fire?
Q.9
Rayon is chemically a
Q.10
Atoms of an element differ from those of all other elements in
Q.11
Which of the following shows the masses of the three elementary particles in decreasing order?
Q.12
In an atomic nucleus, neutrons and protons are held together by:
Q.13
'No two electrons in an atom can have the same set of four quantum numbers' is stated in
Q.14
In an atomic explosion, enormous energy is released which is due to
Q.15
Nautical mile is a unit of distance used in:
Q.16
Which of the following is commonly called a 'poly-amide'?
Q.17
Optical fibers are mainly used for which of the following?
Q.18
The major ingredient of leather is:
Q.19
Nuclear fission is caused by the impact of:
Q.20
Which of the following rays are the most penetrating?
Q.21
What is the wavelength of visible spectrum?
Q.22
According to Avogadro's Hypothesis, the smallest particle of an element or a compound, that can exist independently, is called:
Q.23
'Bar' is the unit of
Q.24
Isotopes are separated by:
Q.25
The wavelength of X-rays is of the order of
Q.26
Knot is a unit of speed of which of the following?
Q.27
Which of the following is used as a moderator in nuclear reactor?
Q.28
Epoxy resins are used as:
Q.29
How many colours the sunlight spectrum has?
Q.30
Which is/are the important raw material(s) required in cement industry?
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