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Exam:
932 quizzes
Chlorine is passed into a cold, dilute solution of sodium hydroxide. The products are New
High School (11–12) · Groups 17 and 18: Halogens and Noble Gases
A-LevelIBAEEE (Amrita)+18A-LevelIB
StemPy LabStemPy Lab
Medium
Aqua regia, used to dissolve gold, contains concentrated hydrochloric acid and concentrated nitric acid in the volume ratio New
High School (11–12) · Groups 17 and 18: Halogens and Noble Gases
A-LevelIBAEEE (Amrita)+18A-LevelIB
StemPy LabStemPy Lab
Medium
What is the shape of a molecule of xenon difluoride, in which xenon has two bonded atoms and three lone pairs? New
High School (11–12) · Groups 17 and 18: Halogens and Noble Gases
A-LevelIBAEEE (Amrita)+18A-LevelIB
StemPy LabStemPy Lab
Medium
Four oxoacids of chlorine are compared by their strength in water. Which one is the strongest of the four? New
High School (11–12) · Groups 17 and 18: Halogens and Noble Gases
A-LevelIBAEEE (Amrita)+18A-LevelIB
StemPy LabStemPy Lab
Medium
Why is the F-F bond weaker than the Cl-Cl bond although fluorine atoms are smaller? New
High School (11–12) · Groups 17 and 18: Halogens and Noble Gases
A-LevelIBAEEE (Amrita)+18A-LevelIB
StemPy LabStemPy Lab
Medium
A chemist passes 0.45 mol of chlorine into hot, concentrated sodium hydroxide. How many moles of sodium chlorate form? New
High School (11–12) · Groups 17 and 18: Halogens and Noble Gases
JEE AdvancedA-LevelIB+23A-LevelIB
StemPy LabStemPy Lab
Hard
A student compares the geometry of four pairs of species. In which pair do both species have the same geometry? New
High School (11–12) · Groups 17 and 18: Halogens and Noble Gases
JEE AdvancedA-LevelIB+23A-LevelIB
StemPy LabStemPy Lab
Hard
Moist ammonia gas is dried by passing it over New
High School (11–12) · Groups 15 and 16: Nitrogen and Oxygen Families
A-LevelIBAEEE (Amrita)+18A-LevelIB
StemPy LabStemPy Lab
Medium
Phosphorous acid, H₃PO₃, is titrated with sodium hydroxide until no acid is left. What is the ratio of moles of sodium hydroxide used to moles of the acid? New
High School (11–12) · Groups 15 and 16: Nitrogen and Oxygen Families
A-LevelIBAEEE (Amrita)+18A-LevelIB
StemPy LabStemPy Lab
Medium
Phosphorus pentachloride is added to an excess of water. The products are New
High School (11–12) · Groups 15 and 16: Nitrogen and Oxygen Families
A-LevelIBAEEE (Amrita)+18A-LevelIB
StemPy LabStemPy Lab
Medium
A student suggests NCl₅ as a possible compound. What is wrong with the suggestion? New
High School (11–12) · Groups 15 and 16: Nitrogen and Oxygen Families
A-LevelIBAEEE (Amrita)+18A-LevelIB
StemPy LabStemPy Lab
Medium
A plant treats 10.2 t of ammonia and every molecule is converted by the Ostwald process into nitric acid. Take the molar masses as 17.0 g/mol and 63.0 g/mol. What mass of pure nitric acid forms? New
High School (11–12) · Groups 15 and 16: Nitrogen and Oxygen Families
JEE AdvancedA-LevelIB+23A-LevelIB
StemPy LabStemPy Lab
Hard
When phosphorous acid, H₃PO₃, is heated, the oxidation states of phosphorus in the products are New
High School (11–12) · Groups 15 and 16: Nitrogen and Oxygen Families
JEE AdvancedA-LevelIB+23A-LevelIB
StemPy LabStemPy Lab
Hard
The Haber process is run at a higher pressure. At the same temperature, which statement is correct for the equilibrium? New
High School (11–12) · Groups 15 and 16: Nitrogen and Oxygen Families
JEE AdvancedA-LevelIB+23A-LevelIB
StemPy LabStemPy Lab
Hard
Water boils at 373 K and hydrogen selenide at 232 K. What is the reason for the difference? New
High School (11–12) · Groups 15 and 16: Nitrogen and Oxygen Families
A-LevelIBAEEE (Amrita)+18A-LevelIB
StemPy LabStemPy Lab
Medium
How many moles of oxygen form when 0.24 mol of potassium chlorate decomposes completely? New
High School (11–12) · Groups 15 and 16: Nitrogen and Oxygen Families
A-LevelIBAEEE (Amrita)+18A-LevelIB
StemPy LabStemPy Lab
Medium
A wet coloured flower loses its colour in sulphur dioxide, and some colour returns in air. Why? New
High School (11–12) · Groups 15 and 16: Nitrogen and Oxygen Families
A-LevelIBAEEE (Amrita)+18A-LevelIB
StemPy LabStemPy Lab
Medium
Hydrogen chloride is made by warming sodium chloride with concentrated sulphuric acid. Which property of the acid is used? New
High School (11–12) · Groups 15 and 16: Nitrogen and Oxygen Families
A-LevelIBAEEE (Amrita)+18A-LevelIB
StemPy LabStemPy Lab
Medium
Carbon is heated with an excess of concentrated sulphuric acid, C + 2H₂SO₄ → CO₂ + 2SO₂ + 2H₂O. How many moles of gas form from 0.14 mol of carbon? Count the steam as a liquid. New
High School (11–12) · Groups 15 and 16: Nitrogen and Oxygen Families
JEE AdvancedA-LevelIB+23A-LevelIB
StemPy LabStemPy Lab
Hard
What is the average oxidation state of sulphur in dithionous acid, H₂S₂O₄? New
High School (11–12) · Groups 15 and 16: Nitrogen and Oxygen Families
JEE AdvancedA-LevelIB+23A-LevelIB
StemPy LabStemPy Lab
Hard
An engineer suggests piping the gas from the converter of an acid plant straight into a tank of water. The plant manager refuses. What is the main reason? New
High School (11–12) · Groups 15 and 16: Nitrogen and Oxygen Families
JEE AdvancedA-LevelIB+23A-LevelIB
StemPy LabStemPy Lab
Hard
Boric acid is best described as New
High School (11–12) · Groups 13 and 14: Boron and Carbon Families
A-LevelIBAEEE (Amrita)+18A-LevelIB
StemPy LabStemPy Lab
Medium
Why does boron not form the ion [BF₆]³⁻, although aluminium forms [AlF₆]³⁻? New
High School (11–12) · Groups 13 and 14: Boron and Carbon Families
A-LevelIBAEEE (Amrita)+18A-LevelIB
StemPy LabStemPy Lab
Medium
An aluminium rod of mass 2.16 g reacts completely with excess dilute hydrochloric acid and a gas bubbles off. What volume of that gas is collected at 273 K and 1 atm? Take M(Al) = 26.98 g/mol and a molar volume of 22.4 L/mol. New
High School (11–12) · Groups 13 and 14: Boron and Carbon Families
A-LevelIBAEEE (Amrita)+18A-LevelIB
StemPy LabStemPy Lab
Medium
A solution of borax in water turns red litmus blue. The reason is that New
High School (11–12) · Groups 13 and 14: Boron and Carbon Families
A-LevelIBAEEE (Amrita)+18A-LevelIB
StemPy LabStemPy Lab
Medium
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