GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 079

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 079

781). Hydrogen was discovered by
A). Lavoisier
B). Mendeieev
C). Madam Curie
D). Cavendish

Answer: Cavendish


   
782). Nitric acid is manufactured by
A). Haber's process
B). Ostwald process
C). Contact process
D). Retorts process

Answer: Ostwald process


   
783). Ozone is
A). a compound of oxygen
B). an isotope of oxygen
C). an allotrope of oxygen
D). an isomer of oxygen

Answer: an allotrope of oxygen


   
784). Basic principle of the hydrogen bomb is
A). radio activity
B). chain reaction
C). nuclear fusion
D). nuclear fission

Answer: nuclear fusion


   
785). The charge on a proton is
A). 1.6×10^9 C
B). 1.6×10^19 C
C). 16×10^19 C
D). 1.6×10^-19 C

Answer: 1.6×10^-19 C



786). The two isotopes of chlorine are 17Cl^35 and 17Cl^37
both of them contain
A). the same number of electrons
B). the same number of protons
C). different number of neutrons
D). all of these

Answer: all of these


   
787). The metal which is found in liquid state at room temperature is
A). Potassium
B). Copper
C). Iodine
D). Mercury

Answer: Mercury


   
788). The major constituent of Super-phosphate of lime is
A). Nitrogen
B). Phosphorous
C). Sulphur
D). Hydrogen

Answer: Phosphorous


   
789). Electrovalent bond is formed between
A). two electropositive elements
B). two electronegative elements
C). two atoms of the same element
D). electropositive and electronegative elements

Answer: two electronegative elements


   
790). Of the following substances the one which can turn blue litmus paper to red is
A). CH3CHO
B). C12H22O11
C). CH3COOH
D). C2H5OH

Answer: CH3COOH