Question Bank Directory

4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is:

The catalytic activity of transition metals is due to:

An element that cannot form [MF6]3- ion is-

Consider the below reaction and identify the missing reagent/chemical. $$CH_3CH_2COO^-Na^+ + NaOH \xrightarrow{?, \ \Delta} CH_3CH_3 + Na_2CO_3$$

Which of the following hormones is produced under the condition of stress which stimulates glycogenolysis in the liver of human beings?

Identify the incorrect statement from the following:

If the radius of the second Bohr orbit of the $He^+$ ion is $105.8 \text{ pm}$, what is the radius of the third Bohr orbit of the $Li^{2+}$ ion?

If the energy value is $E = 3.03 \times 10^{-19} \text{ Joules}$, ($h = 6.6 \times 10^{-34} \text{ J s}$, $c = 3 \times 10^8 \text{ m/s}$), then the value of the corresponding wavelength is:

Isotope of an element contains 19.23% more neutrons as compared to protons. The correct element along with its mass number is: (Given Atomic number Fe: 26, Co: 27)

Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is:

The value of electron gain enthalpy of $Na^+$, if $IE_1$ of Na = 5.1 eV, is:

Which of the following is a basic amino acid?

Match List-I with List-II: **List-I (Quantum number)** (a) $n = 2, l = 1$ (b) $n = 3, l = 2$ (c) $n = 3, l = 0$ (d) $n = 2, l = 0$ **List-II (Orbital)** (i) 2s (ii) 3s (iii) 2p (iv) 3d Choose the correct answer from the options given below:

Be²⁺ is isoelectronic with which of the following ions?

When electromagnetic radiation of wavelength $300 \text{ nm}$ falls on the surface of a metal, electrons are emitted with the kinetic energy of $1.68 \times 10^5 \text{ J mol}^{-1}$. The minimum energy needed to remove one mole of electron from the metal is: (Given: $h = 6.626 \times 10^{-34} \text{ J s}$, $c = 3 \times 10^8 \text{ m s}^{-1}$, $N_A = 6.022 \times 10^{23} \text{ mol}^{-1}$)

The intermediate compound 'X' in the following chemical reaction is: $$\text{Toluene} \xrightarrow{CrO_2Cl_2/CS_2} X \xrightarrow{H_3O^+} \text{Benzaldehyde}$$

Uncertainty in position of an electron ($e^-$) and Helium atom (He) is similar. If uncertainty in momentum of electron is $32 \times 10^5$, then uncertainty in momentum of Helium will be:

The radius of a hydrogen shell is 0.53 Å. In its first excited state, radius of the shell will be:

The product(s) formed from the following reaction is/are:

Clemmensen reduction reaction is: