Chemistry Gk interview questions

The pH of an acidic solution is

1. Zero
2. Neutral
3. Less than 7
4. Greater than 7

Species containing same number of electrons are called

1. Isotones
2. Isoelectronic
3. Isotopes
4. Isobars

The pH of soft drink is

1. 3.0
2. 3.8
3. 6.5
4. 8.5

pH of 0.1 M HCL would be

1. 0
2. 1
3. -1
4. 13

The oxide ore is concentrated by

1. Calcinations
2. Gravity separation
3. Froth floatation
4. Electromagnetic separation

The colour of ferrous hydroxide precipitate is

1. White
2. Dirty green
3. Blue
4. Brown

Which one of the following reaction takes place when carboxylic acid is heated with soda lime?

1. Dehydrogenation
2. Dehydration
3. Decarboxylation
4. Oxidation

What is condensation?

1. Change of heat energy into cooling energy
2. Change of vapour into liquid
3. Change of solid into liquid
4. Change of gas into solid

Which of the following metals exhibits similarity in properties of aluminium?

1. Ba
2. Be
3. Ca
4. Sr

Name the scientist who stated that matter can be converted into energy

1. Boyle
2. Einstein
3. Avogadro
4. Lavoisier

The heavy water is a type of

1. Fuel
2. Ore
3. Moderator
4. Coolent

The combustible material at the tip of a safety match stick is

1. Antimony sulphide
2. Manganese dioxide
3. Sulphur
4. Phosphorus

What are Rubies and Sapphires chemically known as?

1. Boron nitride
2. Lead tetra oxide
3. Silicon dioxide
4. Aluminium oxide

The electrolyte used in the car battery is

1. Distil water
2. Nitric acid
3. Sulphuric acid
4. Hydrochloric acid

Which one of the following periodic properties of the elements does not exhibit the specific characteristic?

1. Electron relativity
2. Radioactivity
3. Valency
4. Atomic size

Which one among the following is called philosopher’s wool?

1. Zinc chloride
2. Zinc nitrate
3. Zinc oxide
4. Zinc bromide

The rate of chemical reaction does not depend upon

1. Pressure
2. Temperature
3. Catalyst
4. Concentration

Which of the following pairs does not contain a coinage metal?

1. Copper and Silver
2. Zinc and Gold
3. Silver and Gold
4. Copper and Gold

Who among the following does not have a chemical element named after him?

1. Isaac Newton
2. Mendeleef
3. Enrico Fermi
4. Albert Einstein

The atomic number of elements were discovered by

1. Newland
2. Mosley
3. Mendeleev
4. Lother Meyer

The colours of the fire crackers are extracted from the elements of the salt of

1. Zn and S
2. K and Hg
3. Sr and Ba
4. Cr and Ni

Rusting of iron is an example of

1. reduction
2. spontaneous combustion
3. rapid oxidation
4. slow oxidation

The percentage of acetic acid in vinegar is

1. 1-4%
2. 2-3%
3. 5-7%
4. 6-10%

Which of the following is more reactive than magnesium?

1. Copper
2. Lead
3. Tin
4. Calcium

The colour imparted by cobalt us oxide in molten glass is

1. Blue
2. Green
3. Yellow
4. Brown

Which of the following metal is the hardest one?

1. Iron
2. Lead
3. Platinum
4. Gold

Teflon is a / an

1. Insecticide
2. Pesticide
3. Hydro carbon
4. Fluoro carbon

Which one of the following mixtures is homogeneous?

1. Calcium carbonate and calcium bicarbonate
2. Graphite and charcoal
3. Methanol and water
4. Starch and sugar

An element is best characterized by its

1. Atomic volume
2. Atomic weight
3. Atomic number
4. Electronic configuration

The gas originating in paddy field is

1. Nitrogen
2. Hydrogen
3. Methane
4. Ethane