Indian Army Nursing Assistant Mock Test - 5 - Indian Army Nursing Assistant MCQ

Φ= hνλ => 2eV= 6.626 x 10^-34 x ν

2 x 1.6 x 10^-19= 6.626 x 10^-34 x ν

On solving we get ν = 4.6 x 10¹⁴ Hz.

The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus

According to liquid drop model of nucleus, an excited nucleus breaks into lighter nuclei just like an excited drop breaks into tiny drops.

Electrons in metal behave as gas.

Concept of holes in the semiconductor:

1. When an electron is removed from a covalent bond, it leaves a vacancy behind. An electron from a neighbouring atom can move into this vacancy, leaving the neighbour with a vacancy. In this way the vacancy formed is called a hole (or cotter), and can travel through the material and serve as an additional current carriers.
2. A hole is considered as a seat of positive charge, having magnitude of charge equal to that of an electron.
3. Holes acts as a virtual charge, although there is no physical charge on it.
4. Effective mass of hole is more than an electron.
5. Mobility of hole is less than an electron.

Crystals of copper sulphate are prepared by the method of crystallization. It is an example of physical change.

So option D is correct answer. 

Dmitri Mendeleev is widely regarded as the father of the periodic table. He developed the first detailed periodic table based on the mass number of elements, which laid the foundation for our modern understanding of chemical elements and their properties.

Hydrogen gas react with oxygen gas to water. That's why it is a combination reaction. Here, reduction of oxygen by hydrogen also takes place and heat is released during the reaction so it is redox and exothermic reaction.

The correct answer is D: Both A and B.

- Precipitation Reaction: AgNO3(aq) + KCl(aq) → AgCl(s) + KNO3(aq) forms a solid precipitate.
- Double Displacement Reaction: AgNO3(aq) + KCl(aq) → AgCl(s) + KNO3(aq) involves the exchange of ions between two compounds.
- Explanation: The given reaction demonstrates both characteristics, forming a precipitate (A) and involving double displacement of ions (B), making it both a precipitation and a double displacement reaction.

Ponds, river and lake are natural source of water as they are present naturally on earth. On the other hand Canals are manmade source of water especially for irrigation purpose.

Di-nitrogen trioxide is formulated as N₂O₃
The oxidation state of oxygen atom is fixed at -2 since it is the more electronegative atom in this case.
If oxidation state of nitrogen is assumed to be ‘x’, then:
2x + (3x -2) = 0
2x – 6 = 0
x = +3
The oxidation state of nitrogen is +3.

A reducing agent is the substance that is oxidized in a redox reaction.

Borax is often used for several closely related minerals or compounds that differ in the crystal water content anhydrous borax, borax pentahydrate, borax decahydrate(general name of borax).

 

 

The process of burning hydrocarbons in the presence of oxygen to produce carbon dioxide and water is called combustion. It is a chemical reaction that releases energy in the form of heat and light.

Silicon carbide is a synthetic abrasive, not a natural one. Natural abrasives include diamond, quartz, sandstone, and others, which are found in nature.

In anomalous Zeeman effect the splitting of spectral lines occurs due to interaction of the applied magnetic field with the magnetic moment generated by the orbital and 'spin' motions of the electron.

Number of moles ∝ 1/Molecular mass Molecular mass of CO₂ = 44, N₂ = 28, CH₄ = 16, HCl = 36.5
CO₂ will have least volume, as no. of moles is directly proportional to volume at constant P and T.

The amount of energy that is required to break a chemical bond in a molecule into individual atoms is known as bond enthalpy. 435.8 kJ mol^-1 is required to dissociate a hydrogen molecule into two hydrogen atoms.

Groups IIA, IIIA, and IVA metals are less reactive than the neighbouring alkali metals. Thus Al and Zn are less reactive metals than Na, K and Mg.

Ethanoic acid is commonly known as acetic acid. It is a weak acid with a sour taste and a pungent smell. Acetic acid is widely used in the production of vinegar, dyes, and pharmaceuticals.

Tubulin is the basic monomer of the microtubule.
Firstly, tubulin units are polymerised to give a protofilament and then proto filaments are arranged to form a microtubule.
So steps are
Nucleation → Polymerisation → Steady state
So in nucleation step gamma tubulins are required.

Systemic circulation carries blood from the heart to the tissues and then carries deoxygenated blood from tissues towards the heart. It helps to distribute the nutrients to different tissues and picks the carbon dioxide and waste. Systemic circulation involves the movement of blood from lungs to the left auricle through pulmonary vein, which is then pumped to the left ventricle. From here the blood goes through the aorta which divides into arteries. The arteries carry the blood towards the tissues and the deoxygenated blood is returned to the right auricle through veins. Thus the correct option is (b)

• Eagle: It is a large flying bird, weigh up to 15 kg. spanning up to 10 ft 6 in, Andean condors have the longest wingspan of any raptor in the world.
• They love to glide in the wind and can each a maximum height of 15000 feet.

The correct answer is C) Slippery scales.

• Fish have slippery scales on their bodies, which help them move smoothly through the water.
• The scales protect the fish and reduce friction, allowing them to swim easily.

Other options like large wings, strong legs, and long neck are not features found in fish that help them swim in water.

The options A, B, C and D on unscrambling give iron, calcium, sulphur and copper respectively. Out of these, calcium helps in formation of teeth and bones.

Communicable diseases also known as:

Communicable diseases are illnesses caused by infectious agents such as bacteria, viruses, fungi, or parasites. They can be transmitted from person to person or from animals to humans. These diseases are also known as:

A: Infectious
- Communicable diseases are often referred to as infectious diseases because they are caused by infectious agents.
B: Non-infectious
- Non-infectious diseases are not caused by infectious agents and cannot be transmitted from person to person. Examples of non-infectious diseases include genetic disorders, autoimmune diseases, and certain types of cancer.
C: Both A and B
- This option is incorrect because communicable diseases are specifically infectious diseases, and they are not non-infectious diseases.
D: None of the above
- This option is also incorrect because communicable diseases are indeed infectious diseases.
In conclusion, communicable diseases are correctly referred to as infectious diseases (option A).

Calcium is necessary for the development and maintenance of healthy bones. Insufficient calcium intake over time can lead to a condition called osteoporosis, which is characterized by weak and brittle bones.

Explanation:
To determine the mineral nutrient/element whose loss is compensated by growing a pulse crop between two cereal crops, we need to understand the concept of crop rotation and nutrient cycling.
Crop rotation:
Crop rotation is the practice of growing different crops in a sequence on the same piece of land. It is done to improve soil fertility, control pests and diseases, and increase crop yield.
Nutrient cycling:
Nutrient cycling refers to the process by which nutrients are taken up by plants, released into the soil through plant residues or root exudates, and then taken up by subsequent crops.
Role of pulse crops:
Pulse crops, such as peas, lentils, and beans, are known for their ability to fix atmospheric nitrogen through a symbiotic relationship with nitrogen-fixing bacteria. These bacteria convert atmospheric nitrogen into a form that can be utilized by plants. When the pulse crop is plowed back into the soil, it releases nitrogen into the soil, thus replenishing the nutrient levels.
The mineral nutrient/element compensated by pulse crops:
In this case, growing a pulse crop between two cereal crops helps compensate for the loss of nitrogen.
The correct answer is C: Nitrogen.
Here are the key points to remember:
- Crop rotation is the practice of growing different crops in a sequence on the same piece of land.
- Nutrient cycling refers to the process of taking up and releasing nutrients by plants and subsequent crops.
- Pulse crops have the ability to fix atmospheric nitrogen through a symbiotic relationship with nitrogen-fixing bacteria.
- When pulse crops are plowed back into the soil, they release nitrogen, replenishing the nutrient levels.
- Growing a pulse crop between two cereal crops helps compensate for the loss of nitrogen.
- The mineral nutrient/element compensated by pulse crops is nitrogen.

Intervarietal hybridization is the process in which parents involved in hybridization belong to the same species but different varieties. For example, crossing of two varieties of wheat or other crops. Interspecific hybrids are bred by mating two species, normally from within the same genus but different species.

Percentage of Water in the Adult Human Body

The percentage of water in the adult human body can vary depending on various factors such as age, sex, and body composition. However, on average, it is estimated that the adult human body is about 60% water.

Factors Affecting Percentage of Water

Several factors can influence the percentage of water in the human body, including:

• Age: The percentage of water tends to be higher in infants and decreases with age.


• Sex: Males generally have a higher percentage of water compared to females.


• Body Composition: The percentage of water can vary based on the amount of muscle mass and body fat.

Importance of Water in the Body

Water plays a crucial role in maintaining overall health and bodily functions, including:

• Hydration: Water is essential for maintaining proper hydration and regulating body temperature.


• Transportation of Nutrients: Water helps transport nutrients and oxygen to cells throughout the body.


• Waste Removal: Water is involved in the elimination of waste products through urine and sweat.


• Lubrication: Water acts as a lubricant for joints and helps prevent friction between organs and tissues.


• Digestion: Water aids in the digestion and absorption of food.

It is important to maintain proper hydration by drinking an adequate amount of water daily to support these vital bodily functions.