The type of glass used in making lenses and prisms is
1 Soft glass
2 Pyrex glass
3 Jena glass
4 Flint glass
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Water is neither acidic nor alkaline because 1 It cannot accept or donate protons 2 It boils at a high temperature 3 It can dissociate into equal number of hydrogen ions 4 It cannot donate or accept electrons
What is the Taxonomy ?
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Which of the following is not a compound? 1 Silica 2 Red lead 3 Slaked lime 4 Black lead
A moderator is used in nuclear reactors in order to 1 Increase the number of neutrons 2 Decrease the number of neutrons 3 Slow down the speed of neutrons 4 Accelerate the neutrons
The vast resources of unutilized natural gas can be used in the production of 1 Graphite 2 Fertilizers 3 Synthetic petroleum 4 Carbide
Which is the largest refractor telescope?
Which radioactive pollutant has recently drawn the attention of the public, due to its occurrence in the building material? 1 Radium 2 Radon 3 Thorium 4 Plutonium
In laundry soaps, a material called ‘filler’ is used. Which of the following is a ‘filler? 1 Talc 2 Sodium silicate 3 Soda ash 4 Sodium phosphate
Rusting of iron involves 1 Oxidation 2 Reduction 3 Displacement 4 Decomposition
Rayon is chemically 1 Glucose 2 Amylase 3 Cellulose 4 Pectin
Which of the following fibers is least prone to fire? 1 Rayon 2 Nylon 3 Cotton 4 Terycott