GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 075
741). Half life period of any first order reaction is a
A). variable
B). constant
C). doubtful quantity
D). none of the above
Answer: constant
742). Emission of which one of the following leaves both atomic number and mass number unchanged?
A). Positron
B). neutron
C). alpha particle
D). gamma ray
Answer: gamma ray
743). Which one of the following salts will show acidic character when dissolved in water?
A). sodium chloride
B). potassium chloride
C). lithium chloride
D). ammonium chloride
Answer: ammonium chloride
744). Two of the most common elements in the earth's crust would include
A). nitrogen and oxygen
B). nitrogen and silicon
C). carbon and oxygen
D). silicon and oxygen
Answer: nitrogen and oxygen
745). The drugs, caffeine, tannins and nicotine are.
A). steroids
B). mild alkalis
C). alkaloids
D). cortisones
Answer: alkaloids
746). Diamond is chemically
A). a mixture of metal carbonates
B). a pure form of sand
C). pure carbon
D). a mixture of calcium & magnesium phosphates
Answer: pure carbon
747). Which of the following statements about the physical properties of metal is not correct?
A). all metals are solid except mercury
B). most of the metals are hard except sodium and potassium
C). metals are not malleable
D). most of the metals are ductile
Answer: metals are not malleable
748). Bakelite is manufactured by the reaction between
A). ethylene glycol and phthalic acid
B). melanine and formaldehyde
C). phenol and formaldehyde
D). urea and formaldehyde
Answer: phenol and formaldehyde
749). Which of the carbohydrates is used in silvering of mirror?
A). sucrose
B). cellulose
C). starch
D). glucose
Answer: glucose
750). The meaning of TFM written on soap covers is
A). total fatty material and indicates the quality
B). total fatty material and indicates the density
C). thin fat matter and indicates the quality
D). thin fat matter and indicates the density
Answer: total fatty material and indicates the density
A). variable
B). constant
C). doubtful quantity
D). none of the above
Answer: constant
742). Emission of which one of the following leaves both atomic number and mass number unchanged?
A). Positron
B). neutron
C). alpha particle
D). gamma ray
Answer: gamma ray
743). Which one of the following salts will show acidic character when dissolved in water?
A). sodium chloride
B). potassium chloride
C). lithium chloride
D). ammonium chloride
Answer: ammonium chloride
744). Two of the most common elements in the earth's crust would include
A). nitrogen and oxygen
B). nitrogen and silicon
C). carbon and oxygen
D). silicon and oxygen
Answer: nitrogen and oxygen
745). The drugs, caffeine, tannins and nicotine are.
A). steroids
B). mild alkalis
C). alkaloids
D). cortisones
Answer: alkaloids
746). Diamond is chemically
A). a mixture of metal carbonates
B). a pure form of sand
C). pure carbon
D). a mixture of calcium & magnesium phosphates
Answer: pure carbon
747). Which of the following statements about the physical properties of metal is not correct?
A). all metals are solid except mercury
B). most of the metals are hard except sodium and potassium
C). metals are not malleable
D). most of the metals are ductile
Answer: metals are not malleable
748). Bakelite is manufactured by the reaction between
A). ethylene glycol and phthalic acid
B). melanine and formaldehyde
C). phenol and formaldehyde
D). urea and formaldehyde
Answer: phenol and formaldehyde
749). Which of the carbohydrates is used in silvering of mirror?
A). sucrose
B). cellulose
C). starch
D). glucose
Answer: glucose
750). The meaning of TFM written on soap covers is
A). total fatty material and indicates the quality
B). total fatty material and indicates the density
C). thin fat matter and indicates the quality
D). thin fat matter and indicates the density
Answer: total fatty material and indicates the density
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