Dr. Ahmed Mohamed Abu-Dief

Assistant Professor - Assistant professor of Inorganic and Physical Chemistry

Faculty of science

Address: Behind hospital of Sohag University - Ali Ebn Abi Taleb Street


2022-06-04 11:15:52 | 1 | Advanced Physical Chemistry
Choose the correct answer or answers Read more

2022-03-07 14:55:24 | 20 | Advanced Physical Chemistry
1- WHICH PAIRING OF QUANTITY AND UNIT IS INCORRECT? A- RESISTIVITY; Ω M. B- CONDUCTANCE; S M–1. C- RESISTANCE; Ω. D- MOLAR CONDUCTIVITY; S M2 MOL–1. 2- WHICH OF THE FOLLOWING IS NOT A STRONG ELECTROLYTE? A- KCL B- CH3COOH C- KNO3 D- NACLO4 3- Which statement is correct about a strong electrolyte? A- Examples of strong electrolytes include CH3CO2H ... Read more

2022-03-07 14:41:29 | 19 | Advanced Physical Chemistry
Conductivity of Solutions
Choose the correct answer 1. Conductivity is defined as the ability to carry ____________ a) Voltage b) Resistance c) Current d) All of the mentioned 2. The reciprocal of conductivity is ____________ a) Viscosity b) Resistivity c) Turbidity d) None of the mentioned 3- Choose the correct order of molar ionic conductivities of the following ions. a) Li < Na ... Read more

2021-02-08 02:25:31 | 59 | INSTRUMENTS & LAB SAFETY: SCI 101
Trure of false
Put true or false * You should always wash your hands before and after lab. 2. Food and drinks are allowed in the lab. 3.Lab coats much be taken off when exiting the lab and entering a non-laboratory area. 4. Good Laboratory Practice (GLP) is a method employed in a laboratory setting to prevent contamination, accidents and injuries. Read more

2021-02-08 01:28:39 | 50 | INSTRUMENTS & LAB SAFETY: SCI 101
Good work practices
Good work practices include, a. smelling and tasting chemicals b. not washing hands before and after lab c. confining long hair and loose clothing d. using damaged equipment and glassware. Read more

2021-02-08 01:24:27 | 48 | INSTRUMENTS & LAB SAFETY: SCI 101
Fire in the laboratory
If there is a fire in the laboratory what are the right steps that should be taken? a. Use fire extinguishers to put out the fire b. Wait for someone to come c. Shut off the gas and electricity only if you know how to; close the doors; exit the building; pull fire alarm (located by each exit) on the ... Read more

2021-02-08 01:20:36 | 49 | INSTRUMENTS & LAB SAFETY: SCI 101
Chemical spill
In the event a chemical spill (such as an acid or base gets into your eyes or on your skin), what should you do? a. Immediately rinse affected area in running water for 15 minutes and get a cold shower if needed b. Report to Public Safety c. Run to get health services Read more

2021-02-07 23:46:07 | 48 | INSTRUMENTS & LAB SAFETY: SCI 101
diluting an acid with water
When diluting an acid with water, always remember to: a. Pour water into acid b. Pour acid into water c. Add both at the same time Read more

2021-02-07 23:42:07 | 48 | INSTRUMENTS & LAB SAFETY: SCI 101
Personal protective equipment2
Is it permissible to have any drink or food in the laboratory? a. Yes b. Never! There is no eating, no drinking, and no smoking permitted in the labs. c. Water only Read more

2021-02-07 23:40:07 | 47 | INSTRUMENTS & LAB SAFETY: SCI 101
Personal protective equipment1
Can open-toed or open-heeled shoes be worn in the lab? a. Yes b. Never c. May be Read more