21 Questions
What word is written on the person's pants?
GUARANTEE
Which page of the notebook is the person writing on?
Right page
What is the measure of the tendency referred to in the handwritten notes?
Ladenere
How many pages of the notebook are visible in the image?
Two pages
What is the person writing about in the notebook?
The tendency of Ladenere in solution
Which type of battery is known for having a higher energy density and being lightweight?
Lithium-ion
In an electrochemical cell, what is the role of the anode?
It acts as the negative electrode where oxidation occurs.
Which type of battery is commonly used in automotive applications due to its ability to deliver high surge currents?
Lead-acid
Which property differentiates fuel cells from conventional batteries?
Fuel cells convert chemical energy directly into electrical energy continuously as long as fuel is supplied.
Which substance in an alkaline battery reacts with manganese dioxide in the cathode during discharge?
Zinc
What is the compound at the cathode in the Leclanche cell as per the diagram?
$CacH_{2}$
Which of the following reactions takes place at the cathode?
$2MN_{4} + 2e^{-} \implies 2NH_{3} + H_{2}O$
Which products are formed at the cathode of the Leclanche cell?
$2NH_{3}$ and $H_{2}O$
What is the role of $2e^{-}$ in the cathode reaction?
It acts as a reactant.
What is the primary chemical reaction occurring at the cathode of the Leclanche cell?
$2MN_{4} + 2e^{-} \implies 2NH_{3} + H_{2}O$
Which nitrogenous bases are classified as purines?
Adenine and Guanine
Which of the following is found in RNA but not in DNA?
Uracil
What type of sugar molecule is found in DNA?
Deoxyribose
What characterizes the strands in the double helix structure of DNA?
They are antiparallel.
Identify the correct equation: $ 127.5 + ? = 873.6 k\Omega $
746.1 $k\Omega$
Which components make up nucleic acids?
Nitrogenous bases, a sugar molecule, and phosphate groups
Study Notes
Leclanche Cell
- A Leclanche cell consists of an anode (+) and cathode (-) connections.
- The cathode reaction is: $2MnO_{4} + 2e^{-} \implies 2NH_{3} + H_{2}O$
Electrochemistry
- Electrochemical cells convert chemical energy to electrical energy.
- The roles of electrodes in an electrochemical cell:
- Anode: positive electrode
- Cathode: negative electrode
Types of Batteries
- Lead-acid batteries
- Nickel-cadmium batteries
- Lithium-ion batteries
- Alkaline batteries
- Fuel cells
Structure of Nucleic Acids
- DNA and RNA are nucleic acids composed of:
- Nitrogenous bases
- Sugar molecules
- Phosphate groups
Nitrogenous Bases
- Adenine (A), Guanine (G), Cytosine (C), Thymine (T), and Uracil (U) are the five nitrogenous bases.
- Purines: Adenine (A) and Guanine (G)
- Pyrimidines: Cytosine (C), Thymine (T), and Uracil (U)
Sugar Molecules
- Deoxyribose is found in DNA
- Ribose is found in RNA
Phosphate Group
- Phosphate groups are present in both DNA and RNA
Double Helix Structure of DNA
- The two strands of DNA are antiparallel
This quiz is about the structure and chemical reactions of a Leclanche cell, a type of primary cell battery. It includes the anode and cathode connections with corresponding chemical equations.
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