(a) Zinc rods
(b) Molten caustic soda
(c) Heavy water
(d) Ordinary water
Which one is known as father of periodic table
Which one of the following contains maximum percentage of carbon?
(a) Wrought iron
(b) High speed steel
(c) Cast iron
(d) Stainless steel
A naturally occurring substance from which a metal can be profitably extracted is called
Wolframite ore is separated from tinstone ore by the process of
Which of the following processes is used to remove reducible oxides from the metal?
(b) Electro refining
Which of the following alkaline earth metal shows properties similar to Al?
Which one of the following buildings is not located in Fatehpur Sikri?
(a) Panch Mahal
(b) Qila-i-Kuhna Mosque
(c) Buland Darvaza
(d) Anup Talao
Which one of the following is the most important feature of Harappan cities?
(a) Wide roads
(b) Planned layout
(c) Huge buildings
(d) Large size
Which one of the following cities was most extensive in area?