GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 050

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 050

491). Combustion chemically is
A). decomposition
B). reduction
C). slow oxidation
D). rapid oxidation

Answer: rapid oxidation


  
492). Cinnamic acid is prepared by
A). Friedel-Crafts reaction
B). Cannizzaro's reaction
C). Perkin's reaction
D). Claisen's reaction

Answer: Perkin's reaction


  
493). The number of isomers in the aromatic compound with the formula C8H10
is
A). 2
B). 3
C). 4
D). 1

Answer: 2

  
494). Trimethyl benzene
A). pyrogallol
B). mesitylene
C). catechol
D). mesityl oxide

Answer: mesitylene


  
495). Benzaldehyde on treatment with chlorine in the absence of catalyst gives
A). Benzoyl chloride
B). O-chlorobenzaldehyde
C). P-chlorobenzaldehyde
D). Chlorobenzene

Answer: Benzoyl chloride

 
 
496). Salicylic acid is prepared by
A). Perkin's reaction
B). Kolbe's reaction
C). Reimer-Tiemann reaction
D). Hofmann reaction

Answer: Kolbe's reaction

  
497). What is the formuia of plaster of paris?
A). CaSO4
B). CaSO4.H2O
C). CaSO4.1/2H2O
D). CaSO4.2H2O

Answer: CaSO4.1/2H2O



  
498). Tartar emetic is
A). potassium bismuth nitrate
B). potassium tartrate
C). antimony tartrate
D). potassium antimonyl tartrate

Answer: potassium antimonyl tartrate


  
499). The fourth electron in atom will have the four quantum numbers as
n I m s
A). 2 0 0 - 1/2
B). 1 0 0 + 1/2
C). 2 1 0 + 1/2
D). 1 1 1 + 1/2

Answer: 2 1 0 + 1/2



  
500). Mass number of an element represents number
A). protons and neutrons
B). electrons and neutrons
C). protons and electrons
D). none of these

Answer: protons and neutrons