Which of the following is used for removing air bubbles from
glass during its manufacture?
1 Feldspar
2 Arsenious oxide
3 Potassium carbonate
4 Soda ash
Which of the following is in liquid form at room temperature? 1 Cerium 2 Sodium 3 Francium 4 Lithium
Which are known as non - luminous irregular nebulae?
The type of glass used in making lenses and prisms is 1 Soft glass 2 Pyrex glass 3 Jena glass 4 Flint glass
what is meant by test manual?
Rubber is coagulated from latex by adding 1 Hydrochloric acid 2 Acetic acid 3 Sulphuric acid 4 Carbonic acid
What is one light hour?
Terls was dedicated to u.n as an international institution?
In an atomic nucleus, neutrons and protons are held together by 1 Gravitational forces 2 Magnetic forces 3 Exchange force 4 Coulombic forces
Graphite and sillimanite are 1 Refractory minerals 2 Ferrous minerals 3 Base minerals 4 None of these
HELPS IN PROPAGATING RADIO SIGNALS
Which of the following minerals has the lower numerical hardness value? 1 Talc 2 Gypsum 3 Apatite 4 Topaz
What are cosmic rays?