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Quiz

Lesson 1 Quiz: Equilibrium of a Particle, Friction and Limiting Static Friction

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  • Questions count: 13
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1.
The 7th term of the geometric sequence (2, 6, 18, ...) is:
1458
729
162
486
2.
The derivative of y = sin(3x) with respect to x is:
3 cos(3x)
3 sin(3x)
cos(3x)
-3 cos(3x)
3.
The evaluation of the definite integral \(\int_{-\pi/2}^{\pi/2} x^5 \cos x\, dx\) is equal to:
B) 1
C) Zero
D) $2pi$
A) \(pi^5 / 5\)
4.
What is the exact chemical deduction according to Egyptian curriculum standards for: Standard Hydrogen Electrode (SHE) and Galvanic Cells?
SHE has an arbitrarily defined standard potential E° = 0.00 V under standard conditions (1 atm H2 gas, 1.0 M H+ solution, 298 K)
The standard hydrogen electrode uses pure copper wire without platinum black
SHE potential changes to 1.00 V when connected to Zinc
SHE can only act as an anode and never as a cathode
5.
STEM Organic Distinction Problem 2: How can you chemically distinguish between phenol (C6H5OH) and ethanol (C2H5OH) using a simple qualitative test?
Adding sodium metal: only ethanol reacts with sodium
Adding litmus paper: ethanol turns blue litmus red
Heating with concentrated sulfuric acid at 180°C
Adding neutral FeCl3 solution: phenol produces a distinct violet color, whereas ethanol shows no change
6.
STEM Organic Distinction Problem 9: How can you chemically distinguish between phenol (C6H5OH) and ethanol (C2H5OH) using a simple qualitative test?
Adding neutral FeCl3 solution: phenol produces a distinct violet color, whereas ethanol shows no change
Adding sodium metal: only ethanol reacts with sodium
Adding litmus paper: ethanol turns blue litmus red
Heating with concentrated sulfuric acid at 180°C
7.
STEM Organic Distinction Problem 12: How can you chemically distinguish between phenol (C6H5OH) and ethanol (C2H5OH) using a simple qualitative test?
Adding sodium metal: only ethanol reacts with sodium
Heating with concentrated sulfuric acid at 180°C
Adding neutral FeCl3 solution: phenol produces a distinct violet color, whereas ethanol shows no change
Adding litmus paper: ethanol turns blue litmus red
8.
STEM Organic Distinction Problem 19: How can you chemically distinguish between phenol (C6H5OH) and ethanol (C2H5OH) using a simple qualitative test?
Adding litmus paper: ethanol turns blue litmus red
Adding sodium metal: only ethanol reacts with sodium
Adding neutral FeCl3 solution: phenol produces a distinct violet color, whereas ethanol shows no change
Heating with concentrated sulfuric acid at 180°C
9.
STEM Organic Distinction Problem 22: How can you chemically distinguish between phenol (C6H5OH) and ethanol (C2H5OH) using a simple qualitative test?
Adding neutral FeCl3 solution: phenol produces a distinct violet color, whereas ethanol shows no change
Adding sodium metal: only ethanol reacts with sodium
Adding litmus paper: ethanol turns blue litmus red
Heating with concentrated sulfuric acid at 180°C
10.
STEM Organic Distinction Problem 29: How can you chemically distinguish between phenol (C6H5OH) and ethanol (C2H5OH) using a simple qualitative test?
Adding sodium metal: only ethanol reacts with sodium
Heating with concentrated sulfuric acid at 180°C
Adding neutral FeCl3 solution: phenol produces a distinct violet color, whereas ethanol shows no change
Adding litmus paper: ethanol turns blue litmus red
11.
STEM Organic Distinction Problem 32: How can you chemically distinguish between phenol (C6H5OH) and ethanol (C2H5OH) using a simple qualitative test?
Adding sodium metal: only ethanol reacts with sodium
Adding litmus paper: ethanol turns blue litmus red
Heating with concentrated sulfuric acid at 180°C
Adding neutral FeCl3 solution: phenol produces a distinct violet color, whereas ethanol shows no change
12.
STEM Organic Distinction Problem 39: How can you chemically distinguish between phenol (C6H5OH) and ethanol (C2H5OH) using a simple qualitative test?
Adding litmus paper: ethanol turns blue litmus red
Heating with concentrated sulfuric acid at 180°C
Adding neutral FeCl3 solution: phenol produces a distinct violet color, whereas ethanol shows no change
Adding sodium metal: only ethanol reacts with sodium
13.
STEM Organic Distinction Problem 42: How can you chemically distinguish between phenol (C6H5OH) and ethanol (C2H5OH) using a simple qualitative test?
Adding sodium metal: only ethanol reacts with sodium
Adding litmus paper: ethanol turns blue litmus red
Heating with concentrated sulfuric acid at 180°C
Adding neutral FeCl3 solution: phenol produces a distinct violet color, whereas ethanol shows no change
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