What change will occur during the electrolysis of brine using carbon electrodes?
A. Chlorine will be given off at the cathode B. Oxygen gas will be given off at the anode C. Sodium will be deposited at the cathode D. The resulting solution, after electrolysis, will be acidic. E. The volumes of hydrogen and chlorine given off during the same time...
Which metal is a constituent of both bronze and solder?
A. copper B. lead C. silver D. tin E. zinc Correct Answer: Option D – tin
An atom of element X has an electronic configuration of 1s²2p³3s²3p². In which group of the periodic table is X?
A. 0 B. 2 C. 3 D. 4 E. 5 Correct Answer: Option D – 5
What mass of silver is deposited when a current of 2.6A is passed through a solution of a silver salt for 40 minutes? [Ag= 108 ; F=96500C]
A. 6.89g B. 6.93g C. 6.98g D. 7.04g E. 7.12g Correct Answer: Option C – 7.04g
Why does the treatment of cotton fabrics with dilute acids weaken the materials?
A. Cotton is hydrolyzed completely to glucose B. The fabrics are soluble in dilute acids C. The molecular chains are partially broken D. The molecular chain length f the fabric increases E. The thread holding the fabric together Is completely destroyed. Correct...Products
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