KERALA PSC / CHEMISTRY / PREVIOUS QUESTION PAPERS / SOLVED QUESTION PAPERS / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY / NOTES

 

KERALA PSC / CHEMISTRY / PREVIOUS QUESTION PAPERS / SOLVED QUESTION PAPERS / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY / NOTES

KERALA PSC / CHEMISTRY / PREVIOUS QUESTION PAPERS / SOLVED QUESTION PAPERS / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY / NOTES

·      The principal nuclear fuel in the sun is

Hydrogen

 

·      The element found in abundance in the sun are

Hydrogen and Helium

 

·      The age of different layers of the earth are ascertained by the use of isotopes of

Carbon

 

·      Water is

A compound

 

·      The symbol of element sodium is

Na

 

·      In the nucleus of an atom, the particles situated are

Proton and neutron

 

·      In a nuclear reactor, the control rods are made of

Cadmium

 

·      Calgon is

Sodium hexametaphosphate

 

·      The chemical name of Caustic Soda is

Sodium hydroxide (NaOH)

 

·      The molecular formula of saturated hydrocarbon is

CₙH₂ₙ₊₂

 

·      It is helpful in ripening the unripe fruits

Ethylene

 

·      The medicine which reduces the fever is called

Antipyretic

 

·      The bacteria which dissociate the nitrates of the soil and free nitrogen are called

Dentitrifying bacteria

 

·      The scientist who invented radioactivity is

Henry Becquerel

 

·      The particle having a major role in binding the nucleus is

Meson

 

·      Which material is used for control rods in Uranium reactions?

Boron steel

 

·      Mercury is best purified by

Vacuum distillation

 

·      The lightest metal is

Lithium

 

·      One of the hardest material is

Diamond

 

·      Cathode ray consist of

Electrons

 

·      Natural rubber is polymer of

Isoprene

 

·      Monomer of polymer polythene

Ethene

 

·      Lindlar catalyst is

Pd/CaCO₃

 

·      The number of moles in 1 mole of a substance is

6.023 × 10₂₃

 

·      The carbon content in steel is

0.02 to 1.5%

 

·      First human made element

Polonium

 

·      Lithium shows diagonal relationship with

Magnesium

 

·      Heavy water is

D₂O

 

·      This substance harms human body due to smoking

Nicotine

 

·      The periodic table arranges the elements in order of

Atomic number

 

·      The name of hydrogen was proposed by

Lavoisier

 

·      Which isotope of hydrogen is radioactive in nature?

Tritium

 

·      First man made element is

Technetium

 

·      Which metal has the highest melting point?

Tungsten

 

·      Brass is an alloy of

Copper, Zinc

 

·      The metal used for galvanization of iron sheets is

Zinc

 

·      Which transition metal has the highest density?

Osmium

 

·      The most abundant alkali metal is

Sodium

 

·      The formula of bleaching powder is

CaOCl₂

 

·      The wire of flash bulb is made up of

Magnesium

 

·      Bauxite is an ore of

Aluminium

 

·      Which metal is present in Chlorophyll?

Magnesium

 

·      Which halogen is radio active in nature?

Astatine

 

KERALA PSC / CHEMISTRY / PREVIOUS QUESTION PAPERS / SOLVED QUESTION PAPERS / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY / NOTES