chemistry gk Interview Questions and Answers
Ques:- pH of 0.1 M HCL would be
A. 0
B. 1
C. -1
D. 13
Ques:- The oxide ore is concentrated by
A. Calcinations
B. Gravity separation
C. Froth floatation
D. Electromagnetic separation
Ques:- The colour of ferrous hydroxide precipitate is
A. White
B. Dirty green
C. Blue
D. Brown
Ques:- Which one of the following reaction takes place when carboxylic acid is heated with soda lime?
A. Dehydrogenation
B. Dehydration
C. Decarboxylation
D. Oxidation
Ques:- What is condensation?
A. Change of heat energy into cooling energy
B. Change of vapour into liquid
C. Change of solid into liquid
D. Change of gas into solid
Ques:- Which of the following metals exhibits similarity in properties of aluminium?
A. Ba
B. Be
C. Ca
D. Sr
Ques:- Name the scientist who stated that matter can be converted into energy
A. Boyle
B. Einstein
C. Avogadro
D. Lavoisier
Ques:- The heavy water is a type of
A. Fuel
B. Ore
C. Moderator
D. Coolent
Ques:- The combustible material at the tip of a safety match stick is
A. Antimony sulphide
B. Manganese dioxide
C. Sulphur
D. Phosphorus
Ques:- The pH of an acidic solution is
A. Zero
B. Neutral
C. Less than 7
D. Greater than 7
Ques:- Species containing same number of electrons are called
A. Isotones
B. Isoelectronic
C. Isotopes
D. Isobars
Ques:- The pH of soft drink is
A. 3.0
B. 3.8
C. 6.5
D. 8.5
Ques:- What are Rubies and Sapphires chemically known as?
A. Boron nitride
B. Lead tetra oxide
C. Silicon dioxide
D. Aluminium oxide
Ques:- The electrolyte used in the car battery is
A. Distil water
B. Nitric acid
C. Sulphuric acid
D. Hydrochloric acid
Ques:- Which one of the following periodic properties of the elements does not exhibit the specific characteristic?
A. Electron relativity
B. Radioactivity
C. Valency
D. Atomic size
Ques:- Which one among the following is called philosopher’s wool?
A. Zinc chloride
B. Zinc nitrate
C. Zinc oxide
D. Zinc bromide
Ques:- The rate of chemical reaction does not depend upon
A. Pressure
B. Temperature
C. Catalyst
D. Concentration
Ques:- Which of the following pairs does not contain a coinage metal?
A. Copper and Silver
B. Zinc and Gold
C. Silver and Gold
D. Copper and Gold
Ques:- Who among the following does not have a chemical element named after him?
A. Isaac Newton
B. Mendeleef
C. Enrico Fermi
D. Albert Einstein
Ques:- The atomic number of elements were discovered by
A. Newland
B. Mosley
C. Mendeleev
D. Lother Meyer
Ques:- The colours of the fire crackers are extracted from the elements of the salt of
A. Zn and S
B. K and Hg
C. Sr and Ba
D. Cr and Ni
Ques:- Rusting of iron is an example of
A. reduction
B. spontaneous combustion
C. rapid oxidation
D. slow oxidation
Ques:- The percentage of acetic acid in vinegar is
A. 1-4%
B. 2-3%
C. 5-7%
D. 6-10%
Ques:- Which of the following is more reactive than magnesium?
A. Copper
B. Lead
C. Tin
D. Calcium
Ques:- The colour imparted by cobalt us oxide in molten glass is
A. Blue
B. Green
C. Yellow
D. Brown
Ques:- Which of the following metal is the hardest one?
A. Iron
B. Lead
C. Platinum
D. Gold
Ques:- Teflon is a / an
A. Insecticide
B. Pesticide
C. Hydro carbon
D. Fluoro carbon
Ques:- Which one of the following mixtures is homogeneous?
A. Calcium carbonate and calcium bicarbonate
B. Graphite and charcoal
C. Methanol and water
D. Starch and sugar
Ques:- An element is best characterized by its
A. Atomic volume
B. Atomic weight
C. Atomic number
D. Electronic configuration
Ques:- The gas originating in paddy field is
A. Nitrogen
B. Hydrogen
C. Methane
D. Ethane