761. A piece of paper is burnt in air, the gas produced is passed through distilled water. The PH of water will be:
A. 3
B. 2.1
C. 6.8
D. 7
762. 0.36 moles of each of aluminum react with oxygen to produce aluminum oxide the amount of product formed is:
A. 0.18 mole
B. 0.27 mole
C. 0.24 mole
D. 0.09 mole
763. All of the following statements are incorrect for 20 moles of hydrogen peroxide except it has:
A. 80 moles of atoms
B. 30 moles of oxygen atoms
C. 30 mole of hydrogen atoms
D. 20 moles of hydrogen atoms
764. Which technique is used to distinguish between imitation and pure diamond?
(A) Telescope
(B) Microscope
C. X-Ray
(D) Refractive Index
765. Which of the following chemical used in the processing of anti-polio vaccine?
(A) Methanol
(B) Ethyl Acetate
C. Formaldehyde
(D) Formic Acid
766. The alkali and alkaline earth metals cannot be used as electrodes in voltaic cells based on water as the solvent because of their rapid?
A. Oxidation
B. Reduction
C. Dissociation
D. Crystallization
767. When ethyl alcohol is produced by the fermentation process, the gas which escapes in the form of bubbles is?
(A) Oxygen
(B) Sulphur Dioxide
C. Carbon Dioxide
(D) Hydrogen
768. Polyethene is formed from the polymerization of?
(A) Ethane
(B) Benzene
(C) Acetylene
D. Ethylene
769. Melting point of mercury is?
(A) 201 Degree Centigrade
(B) 98 Degree Centigrade
(C) 0 Degree Centigrade
D. -39 Degree Centigrade
770. Tyndall effect is the main characteristic which distinguishes colloids from?
(A) Suspensions
B. Solutions
(C) Precipitates
(D) Alloys
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