JEE Mains · Chemistry · STD 11 -p-Block elements - I
Evaluate the following statements related to group \(14\) elements for their correctness. \((A)\)Covalent radius decreases down the group from \(\mathrm{C}\) to \(\mathrm{Pb}\) in a regular manner. \((B)\) Electronegativity decreases from \(\mathrm{C}\) to \(\mathrm{Pb}\) down the group gradually. \((C)\) Maximum covalence of \(\mathrm{C}\) is \(4\) whereas other elements can expand their covalence due to presence of \(d\) orbitals. \((D)\) Heavier elements do not form \(\mathrm{p} \pi-p \pi\) bonds. \((E)\) Carbon can exhibit negative oxidation states. Choose the correct answer from the options given below:
- A \((C), (D)\) and \((E)\) Only
- B \((A)\) and \((B)\) Only
- C \((A), (B)\) and \((C)\) Only
- D \((C)\) and \((D)\) Only
Answer & Solution
Correct Answer
(A) \((C), (D)\) and \((E)\) Only
Step-by-step Solution
Detailed explanation
\((A)\) Down the group; radius increases \((B)\) EN does not decrease gradually from \(\mathrm{C}\) to \(\mathrm{Pb}\). \((C)\) Correct. \((D)\) Correct. \((E)\) Range of oxidation state of carbon ; \(-4\) to \(+4\)
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
- Given below are two statements : One is labelled as Assertion \(A\) and the other is labelled as Reason \(R\). Assertion \(A\): \(\mathrm{pK}_{\mathrm{a}}\) value of phenol is \(10.0\) while that of ethanol is \(15.9\). Reason \(R\): Ethanol is stronger acid than phenol.In the light of the above statements. choose the correct answer from the options given below:JEE Mains 2024 Hard
- Given below are two statements :
Statement (\(\mathbf{I}\)): The radius of isoelectronic species increases in the order.
\(\mathrm{Mg}^{2+} \lt \mathrm{Na}^{+} \lt \mathrm{F}^{-} \lt \mathrm{O}^{2-}\)
Statement (II): The magnitude of electron gain enthalpy of halogen decreases in the order.
\(\mathrm{Cl}\gt\mathrm{F}\gt\mathrm{Br}\gt\mathrm{I}\)
In the light of the above statements, choose the most appropriate answer from the options given below :JEE Mains 2025 Easy - Which of the following acids is a vitamin?JEE Mains 2025 Easy
- Molarity \((M)\) of an aqueous solution containing \(\mathrm{x} g\) of anhyd. \(\mathrm{CuSO}_4\) in \(500 \mathrm{~mL}\) solution at \(32^{\circ} \mathrm{C}\) is \(2 \times 10^{-1} \mathrm{M}\). Its molality will be _______\(\times 10^{-3} \mathrm{~m}\) (nearest integer). [Given density of the solution \(=1.25 \mathrm{~g} / \mathrm{mL}\).]JEE Mains 2024 Medium
- The third ionization enthalpy is minimum forJEE Mains 2020 Medium
- The ratio \(x / y\) on completion of the above reaction is \(...........\).
JEE Mains 2023 Medium
More PYQs from JEE Mains
- The r.m.s speed of oxygen molecules at \(47^{\circ} C\) is equal to that of the hydrogen molecules kept at _________ \({ }^{\circ} C\). (Mass of oxygen molecule/mass of hydrogen molecule \(=32 / 2\) )JEE Mains 2026 Medium
- The figure gives experimentally measured \(\mathrm{B}\) vs. \(H\) variation in a ferromagnetic material. The retentivity, co-ercivity and saturation. respectively, of the material are
JEE Mains 2020 Medium - The mean of a set of \(30\) observations is \(75\). If each other observation is multiplied by a nonzero number \(\lambda \) and then each of them is decreased by \(25\), their mean remains the same. The \(\lambda \) is equal toJEE Mains 2018 Hard
- Two charged particles, having same kinetic energy, are allowed to pass through a uniform magnetic field perpendicular to the direction of motion. If the ratio of radii of their circular paths is \(6: 5\) and their respective masses ratio is \(9: 4\). Then, the ratio of their charges will be.JEE Mains 2022 Medium
- A thin convex lens \(L\) (refractive index \(= 1.5\)) is placed on a plane mirror \(M\). When a pin is placed at \(A\), such that \(OA = 18\, cm\), its real inverted image is formed at \(A\) itself, as shown in figure. When a liquid of refractive index \({\mu _1}\) is put between the lens and the mirror, the pin has to be moved to \(A’\). such that \(OA’ = 27\,cm\), to get its inverted real image at \(A'\) itself. The value of \({\mu _1}\) will be
JEE Mains 2019 Hard - Let \(P _1\) be the plane \(3 x - y -7 z =11\) and \(P _2\) be the plane passing through the points \((2,-1,0)\), \((2,0,-1)\), and \((5,1,1)\). If the foot of the perpendicular drawn from the point \((7,4,-1)\) on the line of intersection of the planes \(P_1\) and \(P_2\) is \((\alpha, \beta\), \(\gamma\) ), then \(\alpha+\beta+\gamma\) is equal to \(............\).JEE Mains 2023 Hard