OAVS TGT Science Mock Test - 10 - OTET MCQ

The correct answer is (b) 1 g of hydrogen and 8 g of oxygen. This is because water (H2O) consists of two hydrogen atoms and one oxygen atom. By mass, hydrogen contributes approximately 11.1% and oxygen contributes approximately 88.9% to the mass of water. Thus, from 9g of water, we get approximately 1 g of hydrogen and 8 g of oxygen.

When an acid reacts with a metal, a metal salt and hydrogen are formed. However, this depends if the metal is reactive or not. For example, magnesium, (Mg) is a violently reactive metal to hydrochloric acid) Therefore, making magnesium chloride and hydrogen

A food chain is a series of plants/animals which are interrelated in the form of an organism being eaten as food by the other. A food chain consists of producers and consumers. In the given food chain, plants are producers. The animals eating plants are called primary consumers and animals eating primary consumers are called secondary consumers. 

Thus, the correct answer is 'Producers and consumers.'

Reaction of a strong acid with strong base is called neutralization reaction which produces salt and water,

HCl + NaOH → NaCl + H₂O

This equation is already balanced.

Maintaining a balanced sex ratio in society is essential to ensure equal representation of both genders. This balance fosters a harmonious environment where both males and females have equal opportunities and rights, ultimately contributing to a more inclusive and equitable society.

Argon is a Noble gas. Noble gases are not very reactive since they have a very stable electron configuration. It is only about 1% of the air in the atmosphere but it is more abundant than any other element on the Periodic Table behind Nitrogen and Oxygen.

Light enters the eye through the cornea and from the cornea, the light passes through the pupil.
The iris, or the colored part of your eye, controls the amount of light passing through. From there, it then hits the lens.

The correct sequence of stages in aerobic respiration is glycolysis, Krebs cycle, and electron transport system. During aerobic respiration, glucose is first broken down into pyruvate through glycolysis in the cytoplasm. The pyruvate then enters the mitochondria to undergo the Krebs cycle, where further breakdown occurs. Finally, the electron transport system located in the inner mitochondrial membrane facilitates the production of ATP through a series of redox reactions involving electron carriers. This sequential process efficiently harvests energy from glucose molecules to generate ATP for cellular functions.

Harmful chemicals from pesticides and crop protection products enter ecosystems and are absorbed by plants and animals. As organisms at lower trophic levels consume contaminated food sources, these chemicals accumulate in their bodies. Since humans are typically at the top of the food chain, they can accumulate higher concentrations of these chemicals through the consumption of contaminated plants and animals.

Many of the organelles found in cells are made up of or are surrounded by membrane and, therefore,would not be found in prokaryotic cells. cytoplasmType of cell: both plant and animalLocation: found inside the cell membrane but outside the nucleusDescription: clear, thick, jellylike material; contains a large amount of water (about 70%) and chemicals;may sometimes appear to be grainy (this grainy appearance comes from the organelles floating in it)Function: contains all the organelles outside of the nucleusOther: the cytoplasm is constantly moving or “streaming” through the cell.

The enzymes lipase and trypsin are present in the pancreatic juice that break down emulsified fats and degrade proteins respectively.

UV rays or ultraviolet rays can affect human health in many ways like causing skin cancer or weakening immune system. Excessive exposure to UV rays can lead to skin cancer because the UV rays cause damage to the DNA in skin cells. 

Papaya has Unisexual flowers ie., make flowers and female flowers are on separate plants. So, the correct answer is papaya.

The molecular weight of CuSO4.5H2O can be calculated by adding up the atomic weights of its constituent elements.
1. Cu (copper) has an atomic weight of 63.5 u.
2. S (sulfur) has an atomic weight of 32 u.
3. O (oxygen) has an atomic weight of 16 u.
4. H (hydrogen) has an atomic weight of 1 u.
To calculate the molecular weight of CuSO4.5H2O, we need to consider the number of atoms of each element in the compound:
1. Cu: There is only one Cu atom in the compound, so its contribution to the molecular weight is 63.5 u.
2. S: There is one S atom in the compound, so its contribution to the molecular weight is 32 u.
3. O: There are four O atoms in the compound, so their total contribution to the molecular weight is 4 * 16 u = 64 u.
4. H: There are ten H atoms in the compound, so their total contribution to the molecular weight is 10 * 1 u = 10 u.
5. Additionally, there is a water molecule (H2O) attached to the CuSO4 molecule. The molecular weight of H2O is 18 u.
Now, let's calculate the molecular weight:
Cu: 1 * 63.5 u = 63.5 u
S: 1 * 32 u = 32 u
O: 4 * 16 u = 64 u
H: 10 * 1 u = 10 u
H2O: 1 * 18 u = 18 u
Total molecular weight = 63.5 u + 32 u + 64 u + 10 u + 18 u = 187.5 u
Therefore, the molecular weight of CuSO4.5H2O is 187.5 u.
The correct answer is not listed among the given options. Please recheck the options or provide the correct answer.

A dilute solution of alcohol in water is an example of homogenous mixture. Alcohol and water do not forms a separate boundary if left undisturbed and both are uniformly distributed.

Changes in lifestyle and attitudes have led to increased waste generation. Factors such as the use of disposable products, non-biodegradable packaging, and a shift towards convenience-driven consumer practices have contributed to the rising levels of waste production globally.

In a redox reaction, the substance that is reduced, gains electrons from the reducing agent. This electron gain results in a decrease in the oxidation state of the substance, leading to its reduction. By accepting electrons, the substance that is reduced undergoes a chemical transformation that is essential for balancing the overall redox reaction.
Example:
Consider the reaction between hydrogen and oxygen to form water:

In this reaction:

• Oxygen (O_2) is reduced because it gains electrons. The oxidation state of oxygen decreases from 0 in O_2 to -2 in H_2O.
• Hydrogen (H_2) is oxidized because it loses electrons. The oxidation state of hydrogen increases from 0 in H_2 to +1 in H_2O.

1 gram - atom nitrogen corresponds to mass of one mole of the nitrogen atom is grams that is one gram - atom of nitrogen represents 28 gms of nitrogen. 
It is equal to 6.023 * 10²³ N atoms, but not  
6.023 * 10²³ N2 molecules.
 

Explanation:
Using fertilisers in farming is an example of high cost production. Here's a detailed explanation:
Why is using fertilisers in farming a high cost production?
- Fertilisers are chemical substances that are added to soil or crops to provide essential nutrients for plant growth. They can be expensive to purchase and apply to crops.
- Fertilisers are often manufactured using complex processes, which require resources such as energy, water, and raw materials. These production costs contribute to the overall expense of using fertilisers in farming.
- The cost of fertilisers can vary depending on factors such as the type of fertiliser, its composition, and the quantity needed for a particular crop or field.
- Additionally, the application of fertilisers may require specialized equipment or labor, which adds to the overall cost of production.
Other considerations:
- While using fertilisers can increase crop yields and improve plant health, their excessive or improper use can have negative environmental impacts. This includes nutrient runoff into water bodies, soil degradation, and pollution.
- Farmers need to carefully consider the cost-effectiveness and environmental sustainability of using fertilisers, balancing the potential benefits with the associated expenses.
In conclusion, using fertilisers in farming is an example of high cost production due to the expenses involved in purchasing, manufacturing, and applying fertilisers to crops.

- The atomic number of an element is the number of protons in its nucleus.
- This defines the identity of the element and determines its position in the periodic table.
- Since protons have a positive charge, the atomic number is effectively the electrical charge of the nucleus.
- Electrons, which are negatively charged, balance this charge in a neutral atom.
- Therefore, the atomic number is best described as the electrical charge of the nucleus, making option C correct.

The correct option is Option B.

The phenomenon of light responsible for the working of the human eye is refraction.

An emulsion s a colloidal solution formed by mixing of two immiscible liquids.

Parents: RRyy (Round green) X rrYY (Wrinkled Yellow)

Gametes: Ry rY

F1: RrYy

Selfing of F1: RrYy (Round yellow) X RrYy (Round yellow)

Gametes: RY, Ry, rY and ry X RY, Ry, rY and ry

F2: RRYY, RRYy, RrYY, RrYy (Round yellow)

RRYy, RRyy, RrYy, Rryy (Round yellow)

RrYY, RrYy, RrYy, Rryy, (Round yellow)

rrYY, rrYy, rrYy (Wrinkled yellow)

rryy (Wrinkled green)

The new combination of characters are: Round yellow and Wrinkled green. apart from parental combinations - Round green and Wrinkled yellow.

Biogas comprises primarily methane (CH₄) and carbon dioxide (CO₂) and may have small amounts of hydrogen sulphide (H₂S).

The acceleration produced in a body is directly proportional to the force acting on it and inversely proportional to the mass of the body. If the mass of the body is doubled, its acceleration will be halved. And if the mass is halved then acceleration will get doubled. So the provided force remains same.

When the egg is not fertilized, the lining of the uterus, which has thickened and become spongy in preparation for supporting a potential embryo, is no longer needed. As a result, this lining sheds and is expelled through the vagina in the form of blood and mucus. This process is known as menstruation and typically occurs in a cyclic pattern every month.

The alveoli are the final branchings of the respiratory tree and act as the primary gas exchange units of the lung. Inhaled oxygen enters the lungs and reaches the alveoli. 

A plasma is a hot ionized gas consisting of approximately equal numbers of positively charged ions and negatively charged electrons. The characteristics of plasmas are significantly different from those of ordinary neutral gases so that plasmas are considered a distinct "fourth state of matter."

Product of the reaction represented by "X":
The likely product of the reaction represented by "X" is CH₃Cl + HCl.

Explanation:
1. The given reaction shows the addition of chlorine (Cl₂) to methane (CH₄) in the presence of sunlight.
2. The reaction will result in the substitution of one hydrogen atom in methane with one chlorine atom, forming a chlorine-substituted methyl group.
3. The chlorine atom will replace one hydrogen atom in methane, resulting in the formation of CH₃Cl (methyl chloride).
4. Since the reaction involves the addition of chlorine (Cl₂), it is likely that a byproduct of the reaction will be HCl (hydrochloric acid).
5. Therefore, the product of the reaction represented by "X" is CH₃Cl + HCl.

Burning of candle is both physical and chemical change. When the candle burns, the wax slowly melts which freezes after some time (Physical change).Burning of wick is a chemical change as it involves combustion.