Quality of petrol is measured by:
A. octane number
B. Heptane number
C. Reforming
D. Refining
The Substance which resist in change in PH is called?
A. Neutralization
B. Osmosis
C. Buffer
D. Active transport
Alkaline PH scale starts from?
A. 8 to 14
B. 6 to 10
C. 7 to 11
D. 0 to 14
The range of acid PH on PH scale is:
A. 9 to 8
B. 6 to 7
C. 1 to 6
D. 1 to 10
At what digit of PH scale PH is neutral?
A. 5
B. 3
C. 7
D. 10
Which of the following is used with milk of lime to kill fungus and molds?
A. Chlorine
B. Silver nitrate
C. Copper Sulfate
D. Nitric acid
What is the color of precipitates of AgBr?
A. Light brown
B. Light green
C. Light Blue
D. Light yellow
Which of the following is the use of Silver nitrate?
A. used as mordant in dyeing
B. used in photography and medicines
C. used in making green pigments
D. All of these
What is the color of copper sulfate crystalline?
A. White
B. Brown
C. Blue
D. Green
What is the color of precipitates of AgI?
A. Yellow
B. Light Yellow
C. Brown
D. Blue
