A group 15 element forms \( d\pi - d\pi \) bond with transition metals. It also forms a hydride, which is the strongest base among the hydrides of other group members that form \( d\pi - d\pi \) bonds. The atomic number of the element is …….
Total number of molecules/species from the following which will be paramagnetic is ………. \[ O_2, O_2^+, O_2^-, NO, NO_2, CO, K_2[NiCl_4], [Co(NH_3)_6]Cl_3, K_2[Ni(CN)_4] \]
Consider the following data: - Heat of formation of \( CO_2(g) \) = -393.5 kJ mol\(^{-1}\) - Heat of formation of \( H_2O(l) \) = -286.0 kJ mol\(^{-1}\) - Heat of combustion of benzene = -3267.0 kJ mol\(^{-1}\) The heat of formation of benzene is ……… kJ mol\(^{-1}\) (Nearest integer).
The spin-only magnetic moment (\(\mu\)) value (B.M.) of the compound with the strongest oxidising power among \(Mn_2O_3\), \(TiO\), and \(VO\) is ……. B.M. (Nearest integer).
Concentrated nitric acid is labelled as 75% by mass. The volume in mL of the solution which contains 30 g of nitric acid is: Given: Density of nitric acid solution is 1.25 g/mL.
Which of the following is/are correct with respect to the energy of atomic orbitals of a hydrogen atom? (A) \( 1s<2s<2p<3d<4s \) (B) \( 1s<2s = 2p<3s = 3p \) (C) \( 1s<2s<2p<3s<3p \) (D) \( 1s<2s<4s<3d \) Choose the correct answer from the options given below:
Match List - I with List - II. List - I (Saccharides) List - II (Glycosidic linkages found) (A) Sucrose (I) \( \alpha 1 - 4 \) (B) Maltose (II) \( \alpha 1 - 4 \) and \( \alpha 1 - 6 \) (C) Lactose (III) \( \alpha 1 - \beta 2 \) (D) Amylopectin (IV) \( \beta 1 - 4 \)
Choose the correct answer from the options given below:
An ideal gas undergoes a cyclic transformation starting from point A and coming back to the same point by tracing the path A→B→C→D→A as shown in the three cases below.Choose the correct option regarding \(\Delta U\):
Match List - I with List - II.
Identify correct conversion during acidic hydrolysis from the following: (A) Starch gives galactose. (B) Cane sugar gives equal amount of glucose and fructose. (C) Milk sugar gives glucose and galactose. (D) Amylopectin gives glucose and fructose. (E) Amylose gives only glucose. Choose the correct answer from the options given below:
Given below are two statements: Statement (I): According to the Law of Octaves, the elements were arranged in the increasing order of their atomic number. Statement (II): Meyer observed a periodically repeated pattern upon plotting physical properties of certain elements against their respective atomic numbers. In the light of the above statements, Choose the correct answer from the options given below:
The value of current \( I \) in the electrical circuit as given below, when the potential at \( A \) is equal to the potential at \( B \), will be _____ A.
A thin transparent film with refractive index 1.4 is held on a circular ring of radius 1.8 cm. The fluid in the film evaporates such that transmission through the film at wavelength 560 nm goes to a minimum every 12 seconds. Assuming that the film is flat on its two sides, the rate of evaporation is:
Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Knowing the initial position \( x_0 \) and initial momentum \( p_0 \) is enough to determine the position and momentum at any time \( t \) for a simple harmonic motion with a given angular frequency \( \omega \). Reason (R): The amplitude and phase can be expressed in terms of \( x_0 \) and \( p_0 \). In the light of the above statements, choose the correct answer from the options given below:
In the circuit shown, assuming the threshold voltage of the diode is negligibly small, then the voltage \( V_{AB} \) is correctly represented by:
