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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 number of terms in the finite arithmetic sequence (5, 9, 13, ..., 81) is:
19 terms
25 terms
20 terms
21 terms
2.
According to the Chain Rule, if y = (3 x2 - 5)4, then dy/dx is:
4 (3 x2 - 5)3
6 x (3 x2 - 5)3
12 x (3 x2 - 5)4
24 x (3 x2 - 5)3
3.
The second derivative d2y/dx2 of the function y = x4 - 2 x3 + 5 is:
12 x2 - 12 x
24 x - 12
4 x3 - 6 x2
12 x2 - 6 x
4.
What is the exact chemical deduction according to Egyptian curriculum standards for: Electronic Configuration of the First Transition Series?
Chromium (Cr: 24) has an anomalous configuration [Ar] 4s1 3d5 to achieve half-filled d-subshell stability, and Copper (Cu: 29) is [Ar] 4s1 3d10 for completely filled d-subshell stability
Both Chromium and Copper have fully filled 4s2 orbitals
Scandium (Sc: 21) exhibits stable oxidation states of +1, +2, and +3
Zinc (Zn: 30) is considered a typical transition element in all its compounds
5.
STEM Organic Distinction Problem 3: 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 litmus paper: ethanol turns blue litmus red
Adding sodium metal: only ethanol reacts with sodium
Heating with concentrated sulfuric acid at 180°C
6.
STEM Organic Distinction Problem 8: 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
7.
STEM Organic Distinction Problem 13: 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
Heating with concentrated sulfuric acid at 180°C
Adding litmus paper: ethanol turns blue litmus red
Adding sodium metal: only ethanol reacts with sodium
8.
STEM Organic Distinction Problem 18: 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
Heating with concentrated sulfuric acid at 180°C
Adding litmus paper: ethanol turns blue litmus red
Adding sodium metal: only ethanol reacts with sodium
9.
STEM Organic Distinction Problem 23: 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 litmus paper: ethanol turns blue litmus red
Adding neutral FeCl3 solution: phenol produces a distinct violet color, whereas ethanol shows no change
10.
STEM Organic Distinction Problem 28: 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 litmus paper: ethanol turns blue litmus red
Adding neutral FeCl3 solution: phenol produces a distinct violet color, whereas ethanol shows no change
11.
STEM Organic Distinction Problem 33: 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
12.
STEM Organic Distinction Problem 38: 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 litmus paper: ethanol turns blue litmus red
Adding sodium metal: only ethanol reacts with sodium
Heating with concentrated sulfuric acid at 180°C
13.
STEM Organic Distinction Problem 43: 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
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