-
mnsoomro
Posts
The average human body contains about _______ gram of Sodium Chloride.
(A) 190 (B) 210 (C) 230 (D) 250 Submitted by :- Muhammad Nawaz
Each day human body breathe in _______ liters of air.
(A) 5,000 to 10,000 (B) 10,000 to 15,000 (C) 15,000 to 20,000 (D) 20,000 to 25,000 Submitted by :- Muhammad…
The chemical name of chalk is
(A) Sodium nitrate (B) Zinc sulfate (C) Sulphuric acid (D) Calcium carbonate Submitted by :- Muhammad Nawaz
Poisonous gas present in the exhaust fumes of a jet plane is__________?
A. Fluorocarbon B. Carbon monoxide C. Methane D. C2H2 Submitted by :- Jamil Ahmed
The formula C6H5-CO-CH3 represents_______ ?
A. Acetone B. Acetic acid C. Acetophenone D. Phenyl acetate Submitted by :- Jamil Ahmed
When gas is ionized, ________ forms.
(A) Molecule (B) Element (C) Plasma (D) Current Submitted by :- Muhammad Nawaz
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?
A. C2H4 B. C3H6 C. C4H8 D. C5H1 Submitted by :- Jamil Ahmed
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. C2H6O B. C6H18O3 C. C6H12O6 D. C2H5O Submitted by :- Jamil Ahmed
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?
A. 74% Fe B. 75% Fe C. 77% Fe D. 78% Fe Submitted by :- Jamil Ahmed