JEE Main Inorganic — p/d/f Block & Coordination: d- and f-Block Elements – Chapter Test
JEE Main Inorganic — p/d/f Block & Coordination: d- and f-Block Elements – Chapter Test is an online chapter test in the JEE Main pattern, covering Inorganic — p/d/f Block & Coordination. Attempt it on SeatBeat with a timer like the real exam, then see a detailed solution for every question and your score and weak-topic analysis.
Topics in this test
| Topic | Questions |
|---|---|
| Inorganic — p/d/f Block & Coordination | 20 |
Difficulty: 10 medium · 10 hard
d- and f-Block Elements MCQ questions with answers
The first 3 of 20 questions. Unlock the series for the rest, each with a solution.
Q1. Consider the following statements about the interstitial compounds formed by transition metals: 1. They are usually harder and have higher melting points than the parent metal. 2. They retain the metallic conductivity of the parent metal. 3. They are chemically highly reactive. Which of these statements is/are correct?
संक्रमण धातुओं द्वारा बनाए गए अंतराकाशी (इंटरस्टीशियल) यौगिकों के विषय में निम्नलिखित कथनों पर विचार कीजिए: 1. ये सामान्यतः जनक धातु की तुलना में कठोर होते हैं और उच्च गलनांक रखते हैं। 2. ये जनक धातु की धात्विक चालकता को बनाए रखते हैं। 3. ये रासायनिक रूप से अत्यधिक क्रियाशील होते हैं। इनमें से कौन-सा/से कथन सही है/हैं?
- A. 1, 2 and 3 / 1, 2 और 3
- B. 1 and 3 only / केवल 1 और 3
- C. 2 and 3 only / केवल 2 और 3
- D. 1 and 2 only / केवल 1 और 2
Solution
Interstitial compounds (e.g. of H, C, N, B trapped in the lattice) are very hard, high-melting and remain electrically conducting, but they are chemically rather inert, so statement 3 is incorrect.
अंतराकाशी यौगिक (जैसे जालक में फँसे H, C, N, B के) बहुत कठोर, उच्च गलनांक वाले होते हैं और विद्युत चालकता बनाए रखते हैं, परंतु ये रासायनिक रूप से अपेक्षाकृत निष्क्रिय होते हैं, अतः कथन 3 गलत है।
Q2. Which one of the following transition-metal oxides is amphoteric in character?
निम्नलिखित में से कौन-सा एक संक्रमण-धातु ऑक्साइड उभयधर्मी प्रकृति का है?
- A. Cr₂O₃
- B. CrO₃
- C. MnO
- D. Mn₂O₇
Solution
Cr₂O₃, with chromium in the intermediate +3 state, dissolves in both acids and alkalis and is amphoteric. Mn₂O₇ and CrO₃, containing the metals in their highest oxidation states, are acidic, while MnO is basic.
Cr₂O₃, जिसमें क्रोमियम मध्यवर्ती +3 अवस्था में है, अम्लों और क्षारों दोनों में घुल जाता है और उभयधर्मी है। Mn₂O₇ और CrO₃, जिनमें धातुएँ अपनी उच्चतम ऑक्सीकरण अवस्थाओं में हैं, अम्लीय हैं, जबकि MnO क्षारीय है।
Q3. For which one of the following 3d transition metals is the standard electrode potential E°(M²⁺/M) positive?
निम्नलिखित में से किस 3d संक्रमण धातु के लिए मानक इलेक्ट्रोड विभव E°(M²⁺/M) धनात्मक होता है?
- A. Ni
- B. Cu
- C. Fe
- D. Zn
Solution
Copper is unique in the 3d series with a positive E°(Cu²⁺/Cu) = +0.34 V, because its high sublimation plus ionisation enthalpies are not compensated by its hydration enthalpy; Zn, Fe and Ni all have negative values.
3d श्रेणी में कॉपर अद्वितीय है जिसका E°(Cu²⁺/Cu) = +0.34 V धनात्मक है, क्योंकि इसकी उच्च ऊर्ध्वपातन एवं आयनन एन्थैल्पियाँ इसकी जलयोजन एन्थैल्पी द्वारा प्रतिपूर्ति नहीं होतीं; Zn, Fe और Ni सभी के मान ऋणात्मक हैं।
Frequently asked questions
How many questions are in the JEE Main Inorganic — p/d/f Block & Coordination: d- and f-Block Elements – Chapter Test?
20 questions for 20 marks, to be answered in 20 minutes.
Is there negative marking in the JEE Main Inorganic — p/d/f Block & Coordination: d- and f-Block Elements – Chapter Test?
Yes — 0.25 marks are deducted for each wrong answer, as in the real exam pattern.
Which topics does the JEE Main Inorganic — p/d/f Block & Coordination: d- and f-Block Elements – Chapter Test cover?
Inorganic — p/d/f Block & Coordination (20 questions).
Is the JEE Main Inorganic — p/d/f Block & Coordination: d- and f-Block Elements – Chapter Test free?
It is part of the JEE Main 2027 Mock Test Series (104 tests, ₹299). You can first try Basic Concepts & Atomic Structure – Topic Test for free.
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