DAsKLiBrO.in

"Study With Mayank Sir" - To beat the competition  📘 Chapter 5 – Coordination Compounds MCQ Type | 0.5 Mark Each | Application-Based Q1. A coordination compound shows optical isomerism when: एक समन्वय यौगिक प्रकाशीय समावयवता दर्शाता है जब: A. It has square planar geometry / इसका ज्यामिति square planar हो B. It contains chelating ligands / इसमें chelating ligands हों C. It has tetrahedral geometry / इसका ज्यामिति tetrahedral हो D. It contains only monodentate ligands / इसमें केवल monodentate ligand हों ✅ Answer: B. Chelating ligands / Chelating ligand Explanation (English): Optical isomerism arises due to asymmetric arrangement, commonly seen in complexes containing chelating ligands like en. Q2. Which complex will NOT show cis–trans isomerism? कौन-सा complex cis–trans समावयवता नहीं दर्शाएगा? A. [Pt(NH₃)₂Cl₂] B. [Co(NH₃)₄Cl₂]⁺ C. [Ni(CO)₄] D. [Cr(en)₂Cl₂]⁺ ✅ Answer: C. [Ni(CO)₄] Explanation (English): [Ni(CO)₄] is tetrahedral, and tetrahedral complexes do not show geometrical...

"Study With Mayank Sir"- To get the smart approch in Exam WA - 8290535520 YouTube - https://www.youtube.com/@dasklibro Chapter–4 : d- and f-Block Elements (d एवं f-ब्लॉक तत्व) Question Type: MCQ (बहुविकल्पीय प्रश्न) Each Question: 0.5 Mark Total Questions: 50 Q1. d-block elements are also called — d-ब्लॉक तत्व कहलाते हैं — A) Representative elements / प्रतिनिधि तत्व B) Transition elements / संक्रमण तत्व ✅ C) Inner transition elements / आंतरिक संक्रमण तत्व D) Noble gases / अक्रिय गैसें Answer: B Explanation: d-block elements show transition properties due to partially filled d-orbitals (NCERT). Q2. General electronic configuration of d-block elements is — d-ब्लॉक तत्वों का सामान्य इलेक्ट्रॉनिक विन्यास है — A) ns²np⁶ B) (n–1)d¹–¹⁰ ns⁰–² ✅ C) ns¹ D) (n–2)f¹–¹⁴ Answer: B Explanation: d-block elements involve filling of (n–1)d orbitals (NCERT). Q3. Which block elements show variable oxidation states? कौन-से तत्व परिवर्ती ऑक्सीकरण अवस्थाएँ दर्शाते हैं? A) s-block B) p-block C) d-bl...

"Study With Mayank Sir" - To hit the ball out of the boundary line WA - 8290535520 Youtube - https://www.youtube.com/@dasklibro Chapter–3 : Chemical Kinetics (रासायनिक गतिकी) Question Type: MCQ (Knowledge Based) Marks per Question: 0.5 Q1. Chemical kinetics deals with — रासायनिक गतिकी संबंधित है — A) Energy of reaction / अभिक्रिया की ऊर्जा B) Rate of reaction / अभिक्रिया की दर ✅ C) Equilibrium constant / साम्यांक D) Structure of atom / परमाणु संरचना Answer: B Explanation: Chemical kinetics studies the rate and mechanism of reactions. Q2. Rate of reaction is defined as — अभिक्रिया की दर परिभाषित की जाती है — A) Change in temperature per unit time B) Change in concentration per unit time / प्रति इकाई समय सांद्रता में परिवर्तन ✅ C) Energy released per unit time D) Volume change per unit time Answer: B Explanation: Rate = change in concentration of reactant or product per unit time. Q3. Unit of rate of reaction is — अभिक्रिया की दर की इकाई है — A) mol L⁻¹ B) s⁻¹ C) mol L⁻¹ s⁻¹ / ...