Photographic plates are coated with a thin film of _________________?
Photographic plates are coated with a thin film of _________________?
A. AgNO3
B. AgI
C. AgCl
D. AgBr
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Which of the following will be acidic_____________?
Which of the following will be acidic_____________?A. propyne
B. 1-butyne
C. ethyne
D. all of the aboveWater gas heated at 450?C and 200 atm pressure in the presence of ZnO+Cr2O3 will produce________________?
Water gas heated at 450?C and 200 atm pressure in the presence of ZnO+Cr2O3 will produce________________?A. methanol
B. methanol
C. carbonic acid
D. methaneFind the PH of a 0.001 M solution of Nitric acid HNO3?
Find the PH of a 0.001 M solution of Nitric acid HNO3?A. 2
B. 3
C. 4
D. 5The main buffer system of the human blood is____________?
The main buffer system of the human blood is____________?A. H2CO3 – HCO3
B. H2CO3 – CO32-
C. CH3COOH – CH3COO–
D. NH2CONH2 – NH2CONH+Elements in the same vertical group of the periodic table have same_______________?
Elements in the same vertical group of the periodic table have same_______________?A. Number of valence electrons
B. Atomic number
C. Atomic mass
D. Atomic volumeThe quantity of heat required to convert one mole of liquid into its vapours at its boiling point is called molar heat of__________________?
The quantity of heat required to convert one mole of liquid into its vapours at its boiling point is called molar heat of__________________?A. vaporization
B. evaporation
C. crystallization
D. sublimation