OAVS TGT Science Mock Test - 9 - OTET MCQ

2NaCl + 2H₂O → 2NaOH + H₂ + Cl₂
(Chlor-alkali process)

Eye lens is convex, in nature. So, image formed by it on the retina is real and inverted.

When an individual is having both the alleles of a contrasting character, it is said to be HETEROZYGOUS .

An olfactory indicator is a material whose smell varies reliant on whether it is mixed with an acidic or basic solution. Olfactory indicators mainly used in laboratory to test whether a solution is a base or an acid. Onion is an example of olfactory indicators. 

For the experiment where CO₂  is given out during respiration, KOH solution are taken in a test tube and placed kn the conical flask KOH absorbs carbon dioxide and prevents it from being utilized by the plant for the process of photosynthesis.

We know that °C = K - 273.15

C= K - 273
C= 270 - 273
C = -3

The function of pupil is to control the amount of light entering the eye and the iris controls the pupil.

Covalent bonds are formed by sharing of electrons.

Rohu is a species of carp family, found in rivers of Indian subcontinent and extensively used in aquaculture. The large silver coloured Rohu fish is an important aquacultured freshwater species. Katla or Catla also known as major Indian carp is commonly found in rivers and lakes of India and one of the most popular species of freshwater fish. The catla along with roho labeo and mrigal carp are the most important aquacultured freshwater fish in India.

Gametes have half the number of chromosome (n) as they are formed by meiosis. After syngamy the (2n) diploidy is restored in zygote.

Alkaline potassium permanganate is a good oxidising agent.

Only those variation which are useful and have advantage get selected.

Dobereiner gave the concept of triads.

Cells are made of a variety of chemical substances - proteins, carbohydrates, fats or lipids and so on. Soil is not a component of  cell. 

As per standard 10% rule.

The correct answer is c as all the statements are false about the solubility. 

B is the correct option.Hyaline cartilage is a type of connective tissue found in areas such as the nose, ears, and trachea of the human body. The word hyaline means “glass-like”, and hyaline cartilage is a glossy, greyish-white tissue with a uniform appearance.

The working of both smooth and cardiac muscles is involuntary while Skeletal or striated muscles move  according to our will  and are voluntary in action.

Mitochondria are called as power house of the cell because it contain enzymes for cellular respiration in which energy is released in form of ATP.

Only a few particles bounced back because the nucleus is so small / atom is mostly empty space that few collided with a nucleus . If they bounced back it was because of alpha particle and nucleus are positive : repulsion if they bounced back it was because nucleus is massive / dense so alpha particles rebound . "

Molar mass of sucrose = 342 g
No. of Oxygen atoms in 3.42g of (C₁₂H₂₂O₁₁) = 11 x NA
Therefore, No. of Oxygen atoms in 342g of (C₁₂H₂₂O₁₁) = 11 x Na x 3.42 / 342
= 0.11 NA
No. of oxygen atoms in 18g of H₂O = 1NA 
Therefore, Total no. of Oxygen atom in 342g of Sucrose and 18g of water 
= 0.11NA +1NA = 1.11NA = 1.11 x 6.02 x 10²³ ⇒ 6.68 * 10²³

The correct answer is C as Environment is formed of :
a)Only biotic components
b)Only abiotic components

The correct option is A.
sodium is located in group 1, which means that it has 1
valence electron. This valence electron is located in sodium's third energy shell

Helium only has 2 electrons and therefore it has a configuration of 1s². Because the 1s orbital is full with 2 electrons and any additional electrons would go in a new energy level. The electron configuration for Helium shows a full outer shell and is Helium is therefore called a Nobel Gas. This means it will not react with other atoms.

Haemoglobin is the iron containing protein found in red blood cells. It is responsible for the transportation of oxygen and carbon dioxide. It consists of four protein chains and each chain has a haem group attached to it. Each haem group has an iron molecule. The oxygen binds to the iron molecule. Since there are four iron molecules, each haemoglobin is capable of carrying four oxygen molecules.

Points (ii) and (iv) are correct. An atom consists of a positively charged, dense and very small nucleus which have all the protons and neutrons. Positive charge is due to protons, as neutrons have no charge. Most of the space is empty because most of the alpha particles pass straight through the gold foil without any deflection.
Electrons have negative charge, it was explained by Thomson. The existance of neutron was discovered by Chadwick.

Physical Change

• It is a temporary change and affects only physical properties like shape, size, etc
• In a physical change, the composition remains the same but the change is only in the arrangement of molecules.

Reason for: Heating of sugar is a Physical change

• Sugar is composed of Carbon(C), Hydrogen (H), and Oxygen (O) atoms.
• These elements react with the fire and transform into a liquid when heated.
• The sugar atoms interact with the oxygen in the air, creating new groups of atoms as a result of the heat.
• The chemical reaction releases energy in the form of smoke and black soot.
• As a result, only the physical state changes.

Hence, due to no change in the physical state, the heating of sugar is a physical change.