When gas is ionized, ________ forms.
(A) Molecule
(B) Element
(C) Plasma
(D) Current
Submitted by :- Muhammad Nawaz
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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A substance is analyzed and found to have an empirical formula of CH2 and a molar mass of 56g/mole. What is the molecular formula of the compound?
Which from the following is NOT true about Helium gas?
(A) Colorless
(B) Odorless
(C) Tasteless
(D) Toxic
Submitted by :- Muhammad Nawaz
A compound is determined to have an empirical formula of C2H6O and a molar mass of 138 g/mole. What is the molecular formula?
A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore?
Find the PH of a 0.01 M solution of Nitric acid HNO3?
A. 2
B. 3
C. 4
D. 5
Submitted by :- Jamil Ahmed
Potassium Permanganate is used for purifying drinking water, because_________?
A. It is a sterilizing agent.
B. It dissolves the impurities of water.
C. It is a reducing agent.
D. It is an oxidizing agent.
Submitted by :- Jamil Ahmed
Marsh gas is_______?
A. Nitrogen
B. Ethane
C. Methane
D. Hydrogen
Submitted by :- Jamil Ahmed
The chemical (Ethyl Mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of:_______?
A. Bromine
B. Fluorine
C. Chlorine
D. Sulphur
Submitted by :- Jamil Ahmed
The average salinity of sea water is________?
A. 3%
B. 3.5%
C. 2.5%
D. 2%
Submitted by :- Jamil Ahmed