Worksheetsأسئلة الكيمياء - الصف العاشر
Total questions: 44
Worksheet time: 30mins
What is the correct formula for the bromine molecule?
Br2
Br
B2
B
Which of the following alternatives is correct to describe the states of matter for halogens at room temperature and standard pressure?
Solid, Liquid, Gas
Liquid, Solid, Gas
Liquid, Gas, Solid
Gas, Liquid, Solid
What do you observe when iodine is displaced from its solution by chlorine?
Precipitate
Gas bubbles emitted
The solution becomes darker
The solution becomes lighter
What color do you expect for fluorine?
Orange
Yellow
Red
Brown
The statement that applies to astatine is:
It has a smaller density than iodine
It has a lower boiling point than iodine
It displaces iodine from a solution containing iodide ions
It has a higher melting point than iodine
What are the expected results of the student's experiment?
Iodine, Water, Bromine
Iodine, Water, Chlorine
Bromine, Water, Chlorine
Chlorine, Water, Iodine
What is the expected outcome for this student's experiment?
A
B
C
D
Which of the following materials is a poor conductor of electricity when molten?
Sulfur
Magnesium
Lithium Chloride
Potassium Oxide
Which of the following equations represents a redox reaction?
CaCO3(s) → CaO(s) + CO2(g)
Br2(aq) + 2NaI(aq) → 2NaBr(aq) + I2(aq)
HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(aq)
CuSO4(aq) + 2NaOH(aq) → Cu(OH)2(s) + Na2SO4(aq)
Which of the following materials can be used as an inert electrode during electrolysis?
Aluminum
Argon
Copper
Platinum
What are the products formed at the anode and cathode during the electrolysis of molten lead bromide?
Bromine, Hydrogen
Oxygen, Hydrogen
Bromine, Lead
Oxygen, Lead
Which diagram represents the electrolysis process?
Carbon electrodes, Ethanol
Carbon electrodes, Distilled water
Carbon electrodes, Sulfuric acid
Carbon electrodes, Mercury
What is the additive used during the electrolysis of aluminum oxide?
Cryolite
Bauxite
Graphite
Water
What are the two elements produced industrially using the electrolysis of sodium chloride solution?
Chlorine and Sodium
Chlorine and Hydrogen
Hydrogen and Sodium
Hydrogen and Oxygen
In the table below, describe oxidation and reduction of a substance?
The substance gains oxygen, the substance gains electrons
The substance loses electrons, the substance gains oxygen
The substance loses oxygen, the substance loses electrons
The substance gains electrons, the substance loses oxygen
What is the solution produced during the electrolysis of sodium chloride solution?
Sulfuric acid
Sodium carbonate
Sodium hydroxide
Hydrochloric acid
What is the half-equation for the reduction of hydrogen ion at the anode?
H2(g) → 2H+(aq) + 2e–
H2(g) + 2e– → 2H+(aq)
2H+(aq) → H2(g) + 2e–
2H+(aq) + 2e– → H2(g)
What are the products formed at the anode and cathode during the electrolysis of potassium iodide solution?
Oxygen, Hydrogen
Hydrogen, Iodine
Potassium, Oxygen
Iodine, Potassium
Which equation represents the reduction of copper using a metal as electrodes?
CuO + CO → Cu + CO2
Mg + CO2 → MgO + CO
CH4 + 2H2O → 4H2 + CO2
HCl + NaOH → NaCl + H2O
What happens during the electrolysis of copper(II) sulfate solution?
The mass of the cathode decreases.
The mass of the anode increases.
The mass of the cathode increases.
The color of the solution fades.
What is the gas emitted from the fermentation device?
Oxygen.
Hydrogen.
Carbon dioxide.
Carbon monoxide.
What is the correct balanced equation for the combustion of ethanol?
C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l)
C2H5OH(l) + 4O2(g) → 2CO2(g) + 4H2O(l)
C2H5OH(l) + 5O2(g) → 2CO2(g) + 5H2O(l)
C2H5OH(l) + 6O2(g) → 2CO2(g) + 6H2O(l)
Which of the following is NOT a use of ethanol?
Cleaning liquid.
Fertilizer for crops.
Biofuel for cars.
Fuel for portable stoves.
What is polymerization?
Evaporating a mixture and condensing it to make a long-chain molecule.
Removing a large number of small molecules from a long-chain molecule.
Breaking down a long-chain molecule into a large number of small molecules.
Forming a long-chain molecule (polymer) from a large number of small molecules (monomers).
What is the name of the monomer for this polymer?
Ethanol.
Propene.
Ethylene.
Ethane.
What is the structural formula of the polymer that can be formed from this monomer?
A
B
C
D
ما الصيغة التركيبية البنائية للمونومر الذي يكون البوليمر أعلاه؟
CC
Cl
HH
H
ما نوع البلمرة التي تكون النايلون؟
الإضافة
التكثيف
التبخير
ما الصيغة التركيبية البنائية للبوليمر الناتج عن هذه المونومرات؟
ما صيغة المادة الناتجة الأخرى التي تتكون عند تكون بوليمر النايلون؟
NH3
H2O
HCl
CO
ماص للحرارة أو طارد للحرارة؟
طارد للحرارة
ماص للحرارة
غير قابل للانعكاس
ما الذي يمثل هذا التفاعل بشكل صحيح؟
ما هو مصدر الهيدروجين المستخدم في عملية هابر؟
الهواء
الغاز الطبيعي
التفاعل بين الصوديوم والماء
التحليل الكهربائي لحمض الكبريتيك المخفف
ما العنصر الأساسي الذي يفتقده المركب لنمو أوراق النبات؟
النيتروجين
البوتاسيوم
الفوسفور
الأمونيوم
صف ما يحدث للروابط خلال التفاعلات الماصة للحرارة والتفاعلات الطاردة للحرارة؟
What happens to the bonds during endothermic and exothermic reactions?
Bonds break
Bonds form
Bonds break and form
Bonds do not change
When heating the solid, it changes from pink to blue, and steam is emitted. How can the solid be returned to its pink color?
Add water
Cool with ice
Add a catalyst
Heat in air
What is the type of change in energy for the reaction H2 + Cl2 → 2HCl?
Endothermic +185 kJ
Exothermic +185 kJ
Endothermic -185 kJ
Exothermic -185 kJ
What is the catalyst used in the Haber process?
Nickel
Iron
Phosphoric acid
Vanadium oxide
What does the graph below represent?
Activation energy
Reaction pathway
Energy of products
Energy of reactants
What conditions can be used to increase the yield of ammonia in the Haber process?
200 atm, greater than 450 °C
200 atm, less than 450 °C
200 atm, greater than 450 °C, less than
200 atm, less than 450 °C, less than
What procedure increases the yield of sulfur trioxide during the contact process?
Increase temperature
Decrease pressure
Use a catalyst
Remove product from reaction mixture
What is the substance that reacts with H2S2O7 to form sulfuric acid?
H2O
SO3
SO2
O2
How can the pH value affect the absorption of essential elements from fertilizers?
5 - 6
6 - 6.5
7 - 7.5
7.5 - 8
