What is used in making of alloys?
- (A) Gypsum
- (B) Granite
- (C) Chromium
- (D) Limestone
- (C) Chromium
Which gas is used in various types of fluorescent and phototubes?
- (A) Argon
- (B) Krypton
- (C) Both (A & B)
- (D) Helium
- (C) Both (A & B)
Which among the following is a metal?
- (A) Gypsum
- (B) Iron
- (C) Limestone
- (D) Granite
- (B) Iron
Where does the oxygen come from that keeps us alive?
- (A) Water
- (B) Carbonates
- (C) Carbon dioxide
- (D) Oxides of minerals
- (C) Carbon dioxide
“Silica” is used in which of the following process?
- (A) Plastic making
- (B) Glass making
- (C) Iron making
- (D) Steel making
- (B) Glass making
Most of the explosions in mines occur due to the mixing of:
- (A) Oxygen with acetylene
- (B) Methane with air
- (C) Hydrogen with oxygen
- (D) Ethane with carbon dioxide
- (B) Methane with air
“Calcium sulfate” is commonly known as:
- (A) Detergents
- (B) Asbestos
- (C) Plaster of Paris
- (D) Gypsum
- (C) Plaster of Paris
The major part of sui gas, petroleum and coal consists of:
- (A) Chlorine
- (B) CFCs
- (C) Methane
- (D) Carbon dioxide
- (C) Methane
Methane is used in daily life with the name of:
- (A) Carbon dioxide
- (B) Natural gas
- (C) Carbon monoxide
- (D) Calcium carbonate
- (B) Natural gas
Which of the following correctly defines the “State of glass”?
- (A) Condensed gas
- (B) Crystalline solid
- (C) Liquid crystal
- (D) Super cooled liquid
- (D) Super cooled liquid
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