List of practice Questions

The current amplification factor and the collector current in a transistor circuit are 100 and 2.2 mA respectively. Then the base current is
Primary CO$_2$ acceptor in C$_4$ plants
A 200 kg steel bar sits horizontally on two supports as shown in the figure. The force on each support is (\( g = 9.8 \, \text{ms}^{-2} \))
steel bar sits horizontally
A bar magnet of length \(0.1~\text{m}\) and magnetic moment of \(5~\text{Am}^2\) is placed in a uniform magnetic field of intensity \(0.4~\text{T}\), with its axis making an angle of \(60^\circ\) with the field. The torque on the magnet is
The decomposition products of [FeO$_4$]$^{2-}$ are:
Assertion (A): Photorespiration is a wasteful process.
Reason (R): There is no synthesis of sugars, ATP or NADPH, instead ATP is utilized and CO$_2$ is released in photorespiration.
Hemozoin is

Which of the following are homopolymers?

In the above reaction, a and b are
$2NH_{3} + 3O_{2}$ → a + $2NO_{2} + O_{2}$ → b → $2NO_{3}$
The hormone that increases blood calcium levels by promoting absorption of $Ca^{2+}$ from gastrointestinal tract is
In humans, sex is determined at the time of

Match the following
List – I (Source)             List – II (Carboxylic Acid)
 

SourceCarboxylic Acid
A. VinegarI. HCOOH
B. ButterII. CH3CH2COOH
C. AntsIII. CH3COOH
 IV. CH3CH2CH2COOH
A steel ball of radius 0.05 cm and density \( 7.8 \, \text{g/cm}^3 \) is dropped into water. What is its terminal velocity?
(Density of water \( = 1 \, \text{g/cm}^3 \), Viscosity of water \( = 0.001 \, \text{Pas} \))
A convex lens has radius of curvature \( R = 40 \, \text{cm} \) for both surfaces and refractive index \( \mu = 1.5 \). Find the focal length.

In the below reaction, geometry of BCl3, X respectively are \(\text{BC}_{3} + \text{NH}_{3} \rightarrow X\)

The energy (in eV) possessed by a neon atom at $77^\circ$C is (Boltzmann constant, $k_B = 1.38 \times 10^{-23}$ J K$^{-1}$)
Observe the following species: AlCl$_3$, NH$_3$, H$^+$, Co$^{3+}$, $^-$OH, Mg$^{2+}$, BF$_3$, Cl$^-$ How many Lewis acids are present in the above list?
Fittig reaction is:
How many asymmetric carbons are present in the following molecule? HOCH$_2$CH(Br)CH(Br)CH$_2$OH
Choose the set of wrong combinations A) Acacia - Phyllode - Petiole
B) Nepenthes - Insectivorous plant - Nitrogen requirement
C) Hibiscus - Two leaves at each nodes - Alternate
D) Neem - Number of leaflets attached at common point - Pinnately compound
Prochordate that exhibits bioluminescence
In Multiple Ovulation and Embryo Transfer method, the stage at which the embryos are transferred to the surrogate mother is:
The resistance \( R \), the inductive reactance \( X_L \), and the capacitive reactance \( X_C \) of a series LCR circuit connected to an ac source are related by \( R = 0.6 X_L = 3 X_C \). The impedance of the circuit is:
Which of the following macromolecules is crucial to the communication system in the body?
The resultant of two vectors \( \mathbf{A} \) and \( \mathbf{B} \) is perpendicular to vector \( \mathbf{A} \), and the resultant magnitude is equal to half of the magnitude of \( \mathbf{B} \). The angle between \( \mathbf{A} \) and \( \mathbf{B} \) is: