Which metal is commonly used for making an electromagnet?
- (A) Copper
- (B) Nickel
- (C) Iron
- (D) Cobalt
- (C) Iron
What is HCL?
- (A) Base
- (B) Strong acid
- (C) Weak acid
- (D) None of these
- (B) Strong acid
Swimming pool water is dis-infected by which chemical?
- (A) Nitric acid
- (B) Urea
- (C) Chlorine
- (D) None of these
- (C) Chlorine
Hydrochloric acid (HCL) is also known as:
- (A) Formic acid
- (B) Muriatic acid
- (C) Oxalic acid
- (D) None of these
- (B) Muriatic acid
Pepsin converts protein into peptides in:
- (A) Acid media
- (B) Alkaline media
- (C) Glucose
- (D) Neutral media
- (A) Acid media
Which of the following does not contain carbon?
- (A) Sugar
- (B) Sand
- (C) Marble
- (D) Petroleum
- (B) Sand
Gun metal contains all of the following EXCEPT:
- (A) Iron
- (B) Tin
- (C) Zinc
- (D) Copper
- (A) Iron
Which element behaves chemically both as metal and non-metal?
- (A) Xenon
- (B) Argon
- (C) Boron
- (D) Carbon
- (C) Boron
The most abundant natural Iron are:
- (A) Magnetite and Pyrite
- (B) Pyrite and Bauxite
- (C) Hematite and Magnetite
- (D) Bauxite and Hematite
- (D) Bauxite and Hematite
Deep blue color is imported to glass by the presence of:
- (A) Nickel oxide
- (B) Cobalt oxide
- (C) Cupric acid
- (D) Ferrous oxide
- (B) Cobalt oxide
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