SRMJEE Mock Test - 8 (Medical) - JEE MCQ

The magnitude of the induced current can be increased by rapidly increasing or decreasing the number of magnetic field lines passing through a closed coil.
The magnitude of the induced current can be increased by:

1. Taking the conductor in the form of a coil of many turns of insulated wire.
2. Increasing the strength of the magnetic field used.
3. Increasing the rate of change of magnetic flux associated with the coil.

The effective resistance between A and B (combination of four resistors) is given by:

The two resistances in the mixed combination are in series and their resultant resistance is then parallel.
So,

⇒ R' = R
∴ Total effective resistance of the network = R + R = 2R

Let l₀ be the length of the solenoid, r be the radius and n be the number of turns per unit length.
Length of the wire l = l₀n(2πr) and
Self Inductance  L = μ₀n²l₀πr²
where l₀ is length of solenoid =1 m, n is the number of turns per unit length.

 (as ω will be same in both cases)



= 6
The correct answer is 6.

On heating the system  x, r, d all increases, since, the expansion of isotropic solids is similar to true photographic enlargement.

Copper is quite unreative. It is less reactive than hydrogen and lies below hydrogen in electrochemical series, so it cannot displace H₂ from dilute acids. Thus, it does not easily corrode in acidic solutions. Moreover, corrosion is a spontaneous process for which free energy change must be negative.

The given reaction is S_N1 type.
For alkyl group, the reactivity decreases in the order 3° > 2° > 1°.
So, (2) is correct.

The manganate and permanganate ions are tetrahedral due to the π− bonding involves overlap of p− orbitals of oxygen with d− orbitals of manganate.

Rate = K [Conc]ᵒʳᵈᵉʳ

Taking the logarithm on both sides:

log(Rate) = logK + order × log[Conc]

Since the slope of the graph log(Rate) vs. log(Conc) represents the order of reaction, a greater slope indicates a higher reaction order.

Thus, the correct order of reaction is:
c < a < b < d

This reaction is called HVZ reaction.

Faraday's second law of electrolysis states that when the same quantity of electricity is passed through different electrolytes, the mass of different ions liberated is directly proportional to their equivalent weights.

Equivalent weight = Atomic mass / Valence factor

In the first cell at the cathode:
Fe²⁺ + 2e⁻ ⟶ Fe
Equivalent weight of Fe²⁺ (E_Fe)_₁ = 56 / 2

In the second cell at the cathode:
Fe³⁺ + 3e⁻ ⟶ Fe
Equivalent weight of Fe³⁺ (E_Fe)_₂ = 56 / 3

Hence, the ratio of the mass of Fe deposited in the first cell at the cathode to the mass of Fe deposited in the second cell at the cathode is:
Mass of Fe (first cell) / Mass of Fe (second cell) = (E_Fe)_₁ / (E_Fe)_₂ = 3/2

 In Bryophytes, the sporophyte does not have a free-living stage. It is dependent on the gametophyte for nutrition and support. 

Correct option is A

The internal and external lining of organs is formed by different types of epithelial tissue, based on the function of the organ. Example, alveoli- exchange of gases- squamous epithelium, skin-protection - keratinised epithelium and so on... . The function of different types of connective tissue is transport substances between various tissues and organs in the body (blood), bind tissue together (loose and dense) and to provide support (bone and cartilage), that i's they do not form linings of body organs.

All the other statements about connective tissue are true.

So, the correct answer is '(iv) only'

• Assertion: True. Algae are classified into Chlorophyceae, Phaeophyceae, and Rhodophyceae, primarily based on differences in their pigment composition and type of stored food, such as starch, mannitol, or laminarin.
• Reason: False. While vegetative reproduction like fragmentation is a common method among algae, it is incorrect to state that algae reproduce exclusively through such methods. Algae can also reproduce asexually through spores and sexually through various types of gametes and reproductive strategies (isogamous, anisogamous, oogamous).
• Therefore, the Assertion is correct, but the Reason is false, making Option C the correct choice.

The TCA cycle begins with a condensation reaction. In this step, an acetyl group, derived from the breakdown of glucose or fatty acids, combines with oxaloacetic acid (OAA), a four-carbon molecule, in the presence of water. This condensation reaction forms a six-carbon compound called citric acid or citrate.

The complete reaction is as follows:
Acetyl-CoA + OAA + H₂O → Citric Acid (Citrate)

The condensation step is significant because it marks the entry of the acetyl group into the TCA cycle and the beginning of a series of enzymatic reactions that ultimately lead to the release of energy and the regeneration of OAA.

Topic in NCERT: Tricarboxylic acid cycle

Line in NCERT: "The TCA cycle starts with the condensation of acetyl group with oxaloacetic acid (OAA) and water to yield citric acid."

• Zygomorphic : These are flowers that can only be divided into two equal halves by one particular vertical plane. An example is the flower of Cassia.
• Hypogynous : In these types of flowers, the gynoecium occupies the highest position while the other parts are situated below it. The flower is said to have a superior ovary and is hypogynous. An example of a hypogynous flower is mustard.
• Perigynous : In these flowers, the gynoecium is located in the center and other floral parts are located on the rim of the thalamus almost at the same level. The ovary here is said to be half inferior. Plum flowers are examples of perigynous flowers.
• Epigynous : In these flowers, the margin of thalamus grows upward enclosing the ovary completely and gets fused with it, the ovary is said to be inferior as the other floral parts are situated above the ovary. An example of an epigynous flower is cucumber.

The counter current mechanism, established by the flow of filtrate in opposite directions in the Henle's loop and the vasa recta, plays a crucial role in the concentration of urine in mammals. This mechanism allows for the exchange of NaCl and urea between the ascending limb of Henle's loop and the descending limb of vasa recta, contributing to the increasing osmolarity towards the inner medullary interstitium. This process aids in the maintenance of a concentration gradient necessary for the reabsorption of water and essential substances in the nephron, thereby enabling the production of concentrated urine.

Topic in NCERT: Counter current mechanism

Line in NCERT: "The flow of filtrate in the two limbs of Henle's loop is in opposite directions and thus forms a counter current."

S-shaped growth curve is also called Verhulst-Pearl logistic curve and is represented by the following equation :

where dN/dt= rate of change in population size, r= intrinsic rate of natural increase, N= population density, K= carrying capacity and 

Topic in NCERT: Logistic Growth

Line in NCERT: "This type of population growth is called Verhulst-Pearl Logistic Growth and is described by the following equation: dN/dt = rN(K-N)"

When the biomass of producer is less and that of the consumer is more the pyramid will have an inverted shape. It occurs in a pond and lake ecosystem. Here the biomass of diatoms in planktons is negligible as compared to their date of crustaceans and small fishes. inverted pyramid soil found in that ecosystem where the number and biomass of producers of more and those of consumers are less.
In most of the ecosystems, the number of the biomass of producers is more than those of a consumer is less. This type of ecosystem has a pyramid where the apex is pointed upwards. This type of pyramid is known as upright pyramid.
In some ecosystem, the number of the producers is more than the consumers. The apex is pointed upwards. This is known as the upright pyramid of the number. Found in the grassland ecosystem.

Exotic species tend to cause a threat to biodiversity. They are not found in hotspots which are regions of high biodiversity. In India, 3 hotspots are found, i.e., Western Ghats and Sri Lanka, Indo-Burma (N-E India) and Himalayas.

Given pyramid is pyramid of numbers in a parasitic food chain. In a parasitic food chain, the pyramid of numbers is inverted. This is due to the fact that a single plant may support the growth of many herbivores and each herbivore in turn may provide nutrition to several parasites, which in turn support many hyper-parasites. Thus, from the producer towards consumers, the number of organisms gradually increase, making the pyramid inverted in shape.

Ovulation is the release of the secondary oocyte from the ovary. In humans, ovulation occurs about 14 days before the onset of the next menstruation.

Mean = 1/2 (3 × Median - Mode)
Mean = 1/2 (3 × 26 - 28)
= 1/2 (50)
Mean = 25

Range of data is defined as the difference between two extreme observations of distribution
Or range = maximum value - minimum value.
Maximum value = 186
Minimum value = 78
So, Range = 186 - 78 = 108

Let the numerator and denominator be p and q respectively.
Then, (p + 2) / (q + 3) = 7/9
⇒ 9(p + 2) = 7(q +3)
⇒ 9p - 7q = 3 ....(i)
Again, (p - 1) / (q - 1) = 4/5
⇒ 5p - 4q = 1 ....(ii)
Solving (i) and (ii) we get,
p = 5, q = 7
Required fraction = 5/7

Here, 'averse' means unwilling or hesitant about giving a large share. 'Disputable' means open to argument and does not fit in the context. 'Agreeable' is the antonym of 'averse.' 'Indebted' means to owe gratitude and 'biased' means partial.