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
CHEMISTRY
Prepare for your upcoming test with a comprehensive collection of Chemistry multiple-choice questions (MCQs), ranging from basic to advanced topics. These Chemistry MCQs cover various sections of the subject, providing you with valuable practice and boosting your chances of scoring well in the Chemistry portion of the test. Whether you’re a student or a job seeker preparing for exams, these MCQs will prove beneficial for your test preparation.
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How many moles are in 22.2 grams of Calcium chloride, CaCl2?
The mass of 3.2 moles of ammonia (NH3) gas?
Mg+O2=MgO Balance the above Chemical equation?
| A) 2Mg + O2 —-> 2MgO | B) 2Mg + O —-> 2MgO |
| C) 2Mg + O —-> MgO2 | D) 2Mg + O2 —-> MgO2 |
Submitted by :- Muhammad Nawaz
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 :- Jamil Ahmed
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
When an aldehyde is reacted with hydrogen cyanide a ” Cyanihydrin” is formed. This process is best termed as __________?
A. Electrophilic addition
B. Electrophilic substitution
C. Nucleophilic addition
D. Necleophilic substitution
Submitted by :- Jamil Ahmed
which of the following are chemical changes?
| A) A & B | B) A, B & C |
| C) C & D | D) All the above |
Submitted by :- Muhammad Nawaz
The most appropriate method for separating a large quantity of a mixture of nonvolatile, nonpolar organic compounds would be__________?
A. Distillation
B. Extraction
C. Gas chromatography
D. Column chromatography
Submitted by :- Jamil Ahmed
The number of lone pairs in XeOF4 is_________?
A. 0
B. 1
C. 2
D. 3
Submitted by :- Jamil Ahmed