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The most commonly used bleaching agent is_________?
A. alcohol B. carbon dioxide C. chlorine D. sodium chlorine Submitted by :- Jamil Ahmed
The main buffer system of the human blood is____________?
A. H2CO3 – HCO3 B. H2CO3 – CO32- C. CH3COOH – CH3COO– D. NH2CONH2 – NH2CONH+ Submitted by :- Jamil Ahmed
A ‘breath test’ used by traffic police to check drunken driving uses ____?
A) Turmeric on filter paper B) Silica gel coated with silver nitrate C) potassium permanganate-sulphuric acid D) Potassium dichromatic-sulphuric acid…
The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is___________?
A. Dalton’s law B. Gay Lussac’s law C. Henry’s law D. Raoult’s law Submitted by :- Jamil Ahmed
The metallurgical process in which a metal is obtained in a fused state is called__________?
A. smelting B. roasting C. calcinations D. froth floatation Submitted by :- Jamil Ahmed
How many moles are in 22.2 grams of Calcium chloride, CaCl2?
A. 0.2 moles B. 0.3 moles C. 0.4 moles D. 0.5 moles Submitted by :- Jamil Ahmed
The mass of 3.2 moles of ammonia (NH3) gas?
A. 53.4 grams B. 54.4 grams C. 55.4 grams D. 56.4 grams Submitted by :- Jamil Ahmed
Mg+O2=MgO Balance the above Chemical equation?
A) 2Mg + O2 —-> 2MgO B) 2Mg + O —-> 2MgO C) 2Mg + O —-> MgO2 D) 2Mg…
In a molecule of carbon monoxide, what are the formal charges on the two atoms?
A. Carbon=0, Oxygen=0 B. Carbon= +1, Oxygen= -1 C. Carbon= -1, Oxygen= +1 D. Carbon=, Oxygen= -1 Submitted by :-…
Which of the following solvents would best facilitate an SN2 substitution reaction?
A. Water B. Hexane C. Dimethylflormamide (DMF) D. Ethanol Submitted by :- Jamil Ahmed