OAVS TGT Science Mock Test - 1 - OTET MCQ

If a strong acid reacts with a weak base, the resulting solution tends to be acidic. This outcome is due to the dominance of the acidic properties in the reaction. The strength of the acid influences the pH of the solution after the reaction.

Given ,v = -3m or -300cm
u = -infinity
f = ?
according to lens formula ,
1/f = 1/v - 1/u
1/f = -1/300 - (-1/infinity)
1/f = -1/300 + 1/infinity
focal length = -300 cm or -3metre
now,
power = 1/focal length(metre)
power = -1/3
power = -0.33 dioptre

The postulates of Dalton’s Atomic theory that is the result of the law of conservation of mass in the relative numbers and kinds of atoms are constant in a given compound. Atoms cannot be created nor destroyed in a chemical reaction.

An arrangement consisting of a number of solar cells joined together in a definite pattern is called a solar panel.

Bromine is the only non-metal at room temperature because the intermolecular forces are strong enough so that it does not vaporize at room temperature.

Atomic Number = Mass no. - No. Of neutrons
⇒ 295 - 196
⇒  99 
So, option ( a) is the correct answer.

Holozoic nutrition involves the ingestion of organic food particles and later its assimilation for the purpose of supplying energy to the whole body.

Where does fertilisation take place?

• Fertilisation: The process in which a sperm cell fuses with an egg cell to form a zygote, which eventually develops into an embryo.


• Location: Fertilisation takes place in the Fallopian tube of the female reproductive system.

Explanation:

• The female reproductive system consists of several organs, including the uterus, vagina, fallopian tubes, and cervix.


• During sexual intercourse, sperm is deposited in the vagina.


• The sperm then travels through the cervix and enters the uterus.


• From the uterus, the sperm continues its journey through the Fallopian tube.


• If an egg is present in the Fallopian tube, fertilisation can occur.


• The sperm penetrates the egg, and their genetic material combines to form a zygote.


• The zygote then implants itself in the uterus, where it develops into an embryo.

Conclusion:

• Fertilisation takes place in the Fallopian tube of the female reproductive system.


• It is the process of sperm fusing with an egg to form a zygote.


• The zygote then develops into an embryo and implants itself in the uterus.

The correct answer is (b) Co. The symbol for the element cobalt is "Co" according to the periodic table.

As metal carbonates react with acid, a neutralisation reaction happens. Salt, water, and carbon dioxide are produced. This can be expressed in the following general equation:

metal carbonate + acid → salt + water + carbon dioxide

Explanation: Sexual reproduction involves the participation of two parents for the process of reproduction. During fertilization, the fusion of male and female gametes results in the creation of a zygote with a full set of chromosomes. This leads to the sharing of genetic information between the parents.

Striated muscles can be controlled by one's own conscious will. Muscles present in our legs are striated muscles hence the following action will be executed by striated muscles present in the legs.

Carbon dioxide is not a mixture since it contain fixed ratio of oxygen and carbon in 2:1, which is a property of compound not a mixture.

An ozone molecule is composed of three oxygen atoms. This differs from the usual molecular oxygen (O2) that consists of two oxygen atoms. Despite being a deadly poison, ozone plays a critical role in protecting the Earth's surface from harmful UV radiation.

The method used to extract metals from the ore in which they are found depends on their reactivity. For example, reactive metals such as aluminium are extracted by electrolysis, while a less-reactive metal such as iron may be extracted by reduction with carbon or carbon monoxide.

Major pollutants produced during combustion of fossil fuels are carbon dioxide, nitrogen oxides and sulfur dioxide into the atmosphere, resulting in potentially devastating long-term contamination of land, air and water resources.

To determine the order of animal food products based on their fat and protein content, we need to compare the three options - fish, egg, and meat - in each set. We are looking for the set that contains the animal food products in the order of more fats, more proteins, and least fat.
Let's analyze each set one by one:
Set A: Fish, Egg, Meat
- Fish: Generally low in fat and high in protein.
- Egg: Contains moderate amounts of fat and high-quality protein.
- Meat: Can vary in fat content depending on the type, but generally contains higher amounts of fat compared to fish and eggs.
Set B: Meat, Milk, Egg
- Meat: Can vary in fat content, but generally contains higher amounts of fat compared to milk and eggs.
- Milk: Contains moderate amounts of fat and protein.
- Egg: Contains moderate amounts of fat and high-quality protein.
Set C: Milk, Meat, Fish
- Milk: Contains moderate amounts of fat and protein.
- Meat: Can vary in fat content, but generally contains higher amounts of fat compared to milk and fish.
- Fish: Generally low in fat and high in protein.
Set D: Egg, Meat, Fish
- Egg: Contains moderate amounts of fat and high-quality protein.
- Meat: Can vary in fat content, but generally contains higher amounts of fat compared to eggs and fish.
- Fish: Generally low in fat and high in protein.
Based on the analysis, we can conclude that Set D: Egg, Meat, Fish contains the animal food products in the order of more fats, more proteins, and least fat among them.

Unburnt corpses (putrefied dead bodies) is the main cause for abundant coliform bacteria.

It is known as boiling. And that temperature known as boiling temperature. When you change a liquid in to gas this process is called vaporization. The process by which a substance gets converted from liquid to gas under low temperature or heating is called evaporation.

The ability of eye lens to focus near and far objects is called power of accommodation. 
Nearest point which the eye can see clearly is called near points. 
The farthest point to which the eye see clearly is known as far point. 
Least distance of distinct vision is the minimum distance at which eye can see the object clearly without strain.

The soil should be loose enough for the potato to send down roots easily. Take a piece of seed potato and press it firmly into contact with the soil. Be sure the “eye” faces up, as in the photo at left. Potatoes, unlike other garden crops, are usually not grown from small seeds. Instead, they grow from small cubes of tubers cut into chunks with at least two "eyes" known as seed potatoes. A potato's eyes only form and sprout under favorable growing conditions and after breaking from a dormant state.

During formation of gametes meiosis occurs resulting in exchange of genes by the process of crossing over.

The Cerebellum, a part of the hindbrain, is responsible for controlling posture and balance. It plays a key role in facilitating the precision of voluntary actions, such as maintaining equilibrium, coordinating movements, and ensuring smooth motor functions. Additionally, the Cerebellum contributes to fine-tuning motor skills and adjusting body movements to achieve stability and coordination.

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

Reuse means using a product more than once, either for the same purpose (for example returnable glass milk bottles) or for a different purpose (such as old jam jars for food storage). Repairing products, selling them on or donating them to charity/community groups is also reusing!

It is preferable to recycling because the item does not need to be re-processed before it can be used again which saves both money and reduces the environmental impact.

Kidneys are the main excretory organs in humans.

Alkenes contain C-C double bond whereas alkynes contain C-C triple bond.

The chemical reaction in which heat is absorbed is called the endothermic reaction. The reaction in which heat is evolved is called exothermic reaction and the reaction in which no thermal changes occur is called a thermic process. Evaporation of ether occurs due to absorption of heat by surrounding. So, it an aendothermic process.

Fossil fuels are non-renewable source of energy.