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QUESTION NUMBER 19
What is observed when phenolphthalein is added to sodium hydroxide solution?
A. Red
B. Yellow
C. Pink
D. Blue
ANSWER: C
QUESTION NUMBER 20
Potassium Permanganate is a power —– agent?
A. Indicating
B. Oxidizing
C. Hydroxide
D. Reducing
ANSWER: B
QUESTION NUMBER 21
what is the molar mass of Na2CO3.10H2O?
A. Approximately 286 g/mol.
B. Approximately 386 g/mol
C. Approximately 486 g/mol
D. Approximately 586 g/mol
ANSWER: A
QUESTION NUMBER 22
The reaction of an acid to a base is called ——?
A. Neutralization
B. Circulation
C. Titration
D. Indication
ANSWER: A
QUESTION NUMBER 23
Na2CO3 is a base because it ionize in a solution to give ——?
A. Nitrate Ions
B. Potassium Manganate
C. Oxygen Ions
D. Carbonate ions (CO3^2-).
ANSWER: D
QUESTION NUMBER 24
The unit of measurement for molar mass in the IUPAC in convention table is —-?
A. m/mol (mole per mole)
B. g/gram (grams per gram
C. g/mol (grams per mole).
D. m/gram (moles per gram)
ANSWER: C
QUESTION NUMBER 25
all standard solution are molar solution ?
A. True
B. False
C. Maybe
D. I dont know
ANSWER: B
QUESTION NUMBER 26
Fe(2) does not give any reaction with potassium Thiocyanate solution?
A. False
B. True
C. I dont know
D. Lets ask emmy
ANSWER: B
QUESTION NUMBER 27
An ionic compound which when in molten of aqueous solution, conducts electricity and is decomposed to form a constituent element is called ….?
A. Electrode
B. Electrolyte
C. Electrochemical Cell
D. Electrolysis
ANSWER: B
QUESTION NUMBER 28
calculate the amount of 0.1m/dm3 of Sodium trioxocarbonate(iv) in 25.00cm3of solution?
A. 0.0023 moles of NaCO3
B. 0.0025 moles of Na2CO3
C. 0.0021 moles of Na2CO3
D. 0.0022 moles of Na2C03
ANSWER: B
QUESTION NUMBER 29
The type of bound in HCL is …..?
A. Pure Covalent
B. Porlar Covalent
C. Dalive
D. Ionic
ANSWER: B
QUESTION NUMBER 30
The change in color of indicator during titration helps to determine —?
A. Starting point of titration
B. Middle point of titration
C. Endpoint of the titration.
D. Unknown point in titration
ANSWER: C
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