CUET · CHEMISTRY · PYQ PAPER 2023
Answer the question on basis of passage given below :
P block elements are placed in groups 13 to 18 of the periodic table. Their valence shell electronic configuration is \(ns^2 np^{1-6}\). Group 16 of the p block elements are known as the group of chalcogens having \(ns^2 np^4\) as their general electronic configuration. They exhibit number of oxidation states but the stability of \(- 2\) oxidation state decreases down the group. They are sometimes also known as group of chalcogens as the name is derived from the Greek word for brass and points to the association of sulphur and its congeners with copper. Their ionisation enthalpy decreases down the group. Oxygen shows anomalous behaviour due to its small size and high electronegativity.
Given below are the Hydrides formed by group 15 elements. Choose the correct decreasing order of basicity of the following hydrides :
(A) \(AsH_3\)
(B) \(PH_3\)
(C) \(NH_3\)
(D) \(BiH_3\)
(E) \(SbH_3\)
Choose the correct answer from the options given below :
- A (C), (B), (A), (E), (D)
- B (B), (A), (C), (D), (E)
- C (A), (D), (E), (B), (C)
- D (D), (E), (A), (C), (B)
Answer & Solution
Correct Answer
(A) (C), (B), (A), (E), (D)
Step-by-step Solution
Detailed explanation
Basicity decreases down the group. \(NH_3 > PH_3 > AsH_3 > SbH_3 > BiH_3\) (C), (B), (A), (E), (D)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from CHEMISTRY
- Answer the question on the basis of passage given below :
For the transition elements
Sc \(\quad\) Ti \(\quad\) V \(\quad\) Cr \(\quad\) Mn\(\quad\) Fe \(\quad\) Co \(\quad\) Ni \(\quad\) Cu \(\quad\) Zn
Atomic numbers :
21 \(\quad\) 22 \(\quad\) 23 \(\quad\) 24 \(\quad\) 25 \(\quad\) 26 \(\quad\) 27 \(\quad\) 28 \(\quad\) 29 \(\quad\) 30 \(\quad\)
Which transition metal ion \(\text{M}^{2+}\) gives magnetic moment 5.92 BM?CUET 2023 Hard - What is the IUPAC name of the product of hydration of propene in the presence of dilute sulphuric acid?CUET 2025 Easy
- Certain Aldehydes, Retore and certain alcohol undergo iodoform test. Certain Aldehydes ketones undergo aldol condensation. While certain aldehydes undergo Cannizaro's reaction. Aldehydes responds to tollen reagent and fehling reagent test.
Which amongst the following will respond to Tollens' reagent test?
A. Benzaldehyde \((C_6H_5CHO)\)
B. Formaldehyde \((HCHO)\)
C. Formic acid \((HCOOH)\)
D. Acetone \((CH_3COCH_3)\)
Choose the correct optionCUET 2023 Easy - Which two transition metal ions has same \(3d\) electronic configuration?
A. \(Mn^{3+}\)
B. \(Fe^{2+}\)
C. \(Mn^{2+}\)
D. \(Fe^{3+}\)
E. \(Cr^{3+}\)
Choose the correct answer from the options given below :CUET 2023 Hard - Phenols are acidic in nature. Which of the following statements is incorrect about them?CUET 2025 Easy
- Read the passage carefully and answer the Questions
A homogeneous mixture of two or more than two components has uniform composition and properties. The binary solutions have two components, which may be solid, liquid or gas. The resultant solution has a larger amount of solvent and a smaller amount of solute. The amount of solute in a given amount of solvent decides the concentration of the resulting solution. The concentration can be expressed in various ways, like molarity, molality, normality and mole fraction.
Molarity of a solution containing 8 grams \(NaOH\) in one liter of water is:CUET 2025 Hard
More PYQs from CUET
- A plano convex lens is made of material having refractive index 1.8. If the radius of curvature of the curved surface is 80 cm, then focal length of the lens is :CUET 2023 Easy
- Electrical energy is transmitted over long distances at high alternating voltages by the use of a transformer. Choose the correct statements from the following :
(A) Higher voltage implies less power loss.
(B) The alternating magnetic flux induces eddy currents in the iron core and causes heating.
(C) Step up transformer increases the current by reducing the voltage in the above transformer.
(D) Transmission lines can be made thinner to reduce power loss.
Choose the correct answer from the options given below :CUET 2023 Hard - The figure shows a long cylindrical straight wire of radius a carrying steady current (I). The current (I) is uniformly distributed across the cross-section of the wire. The ratio of the magnetic fields at points \(r=\frac{a}{3}\) and \(r=\frac{a}{2^{\prime}}\) respectively is: Here r is the distance of point from the axis of cylinder.
CUET 2025 Hard - Match List-I With List-II
Choose the correct answer from the options below:LIST – I (Transition metal ion) LIST – II (Property) (A) \(Mn ^{3+}\) (I) \(3 d^6\), green (B) \(Fe ^{2+}\) (II) \(3 d^4\), violet (C) \(Ti ^{4+}\) (III) \(3 d^0\), colourless (D) \(V ^{2+}\) (IV) \(3 d^3\), violet CUET 2025 Easy - When an electron of hydrogen atom is raised from the ground state to an excited state.CUET 2023 Easy
- Match List I with List II
LIST I LIST II A. \(\int_{1}^{2} \frac{\sqrt{x}}{\sqrt{3-x} + \sqrt{x}} dx\) I. -\(\frac{1}{2}\log 3\) B. \(\int_{1}^{2} x^2 dx\) II. \(\frac{7}{3}\) C. \(\int_{-4}^{-1} \frac{1}{x} dx\) III. \(\frac{1}{2}\) D. \(\int_{0}^{1} \frac{1}{2x-3} dx\) IV. -\(\log 4\)
Choose the correct answer from the options given below:CUET 2023 Medium