Q39.The amorphous form of silica is: (1) quartz (2) kieselguhr (3) tridymite (4) cristobalite
What This Question Tests
This question tests factual recall about the different allotropic forms of silica, specifically identifying its amorphous variety from given options.
Concepts Tested
📚 NCERT Sections This Tests
14.1 — In An N-Type Silicon, Which Of The Following Statement Is True:
Physics Class 12 · Chapter 14
14.1 In an n-type silicon, which of the following statement is true: (a) Electrons are majority carriers and trivalent atoms are the dopants. (b) Electrons are minority carriers and pentavalent atoms are the dopants. (c) Holes are minority carriers and pentavalent atoms are the dopants. (d) Holes are majority carriers and trivalent atoms are the dopants.
14.2 — Which Of The Statements Given In Exercise 14.1 Is True For P-Type
Physics Class 12 · Chapter 14
14.2 Which of the statements given in Exercise 14.1 is true for p-type semiconductos.
4.12 — What Are Interstitial Compounds? Why Are Such Compounds Well Known For
Chemistry Class 11 · Chapter 4
4.12 What are interstitial compounds? Why are such compounds well known for transition metals?
📋 Question Details
- Chapter
- p-block Elements
- Topic
- Silicon and its compounds
- Year
- 2019
- Shift
- 09 Apr Shift 2
- Q Number
- Q39
- Type
- MCQ
- NCERT Ref
- Class 11 Chemistry Ch 11: The p-Block Elements
More from this Chapter
Q87.Which of the following oxides is amphoteric in character? (1) CaO (2) CO2 (3) SiO2 (4) SnO2
Q77.Which of the following statements is true? (1) H3PO3 is a stronger acid than H2SO3 (2) In aqueous medium HF is a stronger acid than HCl (3) HClO4 is a weaker acid than HClO3 (4) HNO3 is a stronger acid than HNO2
Q94.What products are expected from the disproportionation reaction of hypochlorous acid? (1) HClO3 and Cl2O (2) HClO2 and HClO4 (3) HCl and Cl2O (4) HCl and HClO3
Q45.The stability of dihalides of Si, Ge, Sn and Pb increases steadily in the sequence (1) GeX2 ≪SiX2 ≪SnX2 ≪PbX2 (2) SiX2 ≪GeX2 ≪PbX2 ≪SnX2 (3) SiX2 ≪GeX2 ≪SnX2 ≪PbX2 (4) PbX2 ≪SnX2 ≪GeX2 ≪SiX2