Which among the following is false about natural rubber?
(A) It is an elastomer
(B) It is a monomer of cis-isoprene
(C) Natural rubber is a polymer of chlororprene
(D) It is heated with sulphur compounds to improve its properties
Plastic bottles are made of a polymer called PET. The expanded form of PET is
(A) Polyethylene terephthalate
(B) Polyethyl Terelene
(C) Polyethylene triphosphate
(D) Polyethyl tetrachloride
The brand name Teflon represents which polymer?
(A) Polystyrene
(B) Polypropylene
(C) Polytetrafluoroethylene
(D) Polyethylene terephthalate
Which is widely used in the plastic industry for manufacturing Bakelite?
(A) Ethyl Alcohol
(B) Phenol
(C) Ortho-Cresol
(D) Catechol
A mixture of silver nitrate in a salt solution produces a curd-like substance. What is this reaction?
(A) Displacement
(B) neutralization
(C) combination
(D) precipitation
What kind of brushing should be done to clean the mouth so that dentistry can be stopped?
(A) acidic dentin
(B) basic dentistry
(C) neutral dentition
(D) all
Which nature's flame is emitted when a ribbon of magnesium is combusted?
(A) red and bright
(B) Blue shiny
(C) White luminous
(D) bright green
Which gas is emitted by adding dilute sulfuric acid to granulated zinc?
(A) Hydrogen gas
(B) Sulfur Dioxide
(C) Oxygen gas
(D) No gas
What is the substance of tooth gum which is very hard?
(A) Copper chloride
(B) calcium phosphate
(C) calcium carbide
(D) calcium carbonate
What is the bond between two amino acids in a protein called?
(A) Ester bond
(B) Glycosidic bond
(C) Peptide bond
(D) Phosphodiester bond
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