Dalton's Atomic Theory Quiz 2 ( Form 2, Chemistry )

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Test your knowledge on atoms and laws of chemistry.

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Dalton's Atomic Theory Quiz 2 ( Form 2, Chemistry )


Froggy Jumps Dalton's Atomic Theory Quiz 2 ( Form 2, Chemistry )Version en ligne Test your knowledge on atoms and laws of chemistry. par YAKILI LMS 1 What did Dalton's theory state about atoms? a Atoms are the smallest units of matter that cannot be divided b Atoms can be split into protons and electrons c Atoms are always visible under a light microscope 2 Which law shows mass is conserved in chemical reactions? a Law of Multiple Proportions b Law of Definite Proportions c Law of Conservation of Mass 3 In a chemical reaction, what happens to the total mass? a It increases b It decreases c It remains the same 4 What does the Law of Definite Proportions state? a A compound contains the same elements in a fixed ratio b Elements in a compound vary ratio c Compounds have no fixed ratio of elements 5 Which statement is true about compounds in the law of definite proportions? a Mass ratios vary between samples b They contain only one element c There is a fixed mass ratio of elements 6 What is a key idea of the Law of Multiple Proportions? a All compounds have equal ratios of elements b Different compounds built from the same elements have simple whole-number ratios c Different compounds have random ratios 7 Dalton introduced the concept that atoms are indivisible atoms called? a Quarks b Indivisible particles c Molecules 8 What kind of evidence supported Dalton’s ideas? a Only theoretical reasoning b Astronomical data c Experimental observations of reactions 9 If 2 g of hydrogen reacts with 16 g of oxygen to form water, what law is illustrated? a Law of Conservation of Mass b Law of Multiple Proportions c Law of Definite Proportions 10 Which statement best describes a compound’s composition according to the law of definite proportions? a The ratio varies with samples b The ratio of elements is constant c The ratio is always 1:1 11 Which law explains why CO2 and CO have different ratios of C and O? a Law of Conservation of Mass b Law of Multiple Proportions c Law of Definite Proportions 12 Dalton’s theory suggested atoms combine in a Random ratios b Fractional ratios c Whole-number ratios 13 What evidence supports constant mass in reactions? a Mass before and after is equal b Mass changes unpredictably c Mass only increases 14 Which concept is part of Dalton’s atomic theory? a Atoms of the same element are identical b Atoms of different elements are identical c Atoms can be created from nothing 15 What does a chemical formula represent in Dalton's view? a Absolute sizes of atoms b Ratio of atoms in a compound c Molecular weight only 16 An element’s atoms join to form a Mixtures b Solutions c Compounds 17 Which law ties mass to the total of reactants and products? a Law of Multiple Proportions b Law of Conservation of Mass c Law of Definite Proportions 18 What happens to atoms in a chemical reaction according to Dalton? a They rearrange to form new substances b They disappear c They split into subatomic parts 19 Which of the following is true about definite proportions? a Ratios vary widely b Only one element is present c A given compound has fixed element ratios 20 Which pair best describes the Law of Definite Proportions? a Water always H2O, salt always NaCl b Water varies H vs O c Salt varies NaCl ratio 21 Why did Dalton’s theory use indivisible atoms? a To justify divisibility of atoms b To explain mixtures only c To explain constant composition of compounds 22 Which law supports that mass is conserved during reactions? a Multiple Proportions b Conservation of Mass c Definite Proportions 23 In the Law of Multiple Proportions, what do CO and CO2 illustrate? a Same elements, different ratios b Same ratios for both c Different elements entirely 24 What is Dalton’s contribution to chemistry? a Quantum mechanics b Atomic theory foundation c Periodic table creation 25 If CO has 1 C and 1 O, and CO2 has 1 C and 2 O, what law applies? a Law of Definite Proportions b Law of Conservation of Mass c Law of Multiple Proportions 26 Which statement matches the Law of Conservation of Mass? a Mass decreases in reactions b Mass increases in reactions c Mass entering a reaction equals mass leaving 27 Dalton proposed atoms combine to form a Solutions b Compounds c Mixtures 28 What does the Law of Definite Proportions apply to? a Mixtures b Compounds c Elements 29 Which is not part of Dalton’s atomic theory? a Atoms combine in fixed ratios b Atoms can be subdivided into smaller particles c Atoms are invisible and indivisible 30 Which reaction example shows mass balance? a Reactants mass exceeds products b Reactants mass equals products mass c Products mass exceeds reactants 31 In a fixed ratio, which is true? a Elements appear in a constant proportion b Proportions vary with temperature c Proportions depend on pressure 32 Which term means 'atoms of an element are alike'? a Atoms are larger than molecules b Atoms are different within an element c Elemental atoms are identical 33 The law of definite proportions is also called? a Proust's law b Boyle's law c Avogadro's law 34 Which is not a Dalton-era concept? a Atoms rearrange during reactions b Compounds form from atoms in fixed ratios c Atoms can be created or destroyed in reactions 35 What do chemical equations uphold? a Conservation of mass and atoms b Charge only c Energy only 36 Which is a consequence of the Law of Multiple Proportions? a All compounds have identical mass b Mass ratios are random c Different compounds from same elements have simple ratios 37 Dalton’s atomic theory helped explain a Why electricity flows b Why compounds have definite composition c Why gases have pressure 38 Which statement aligns with experimental evidence of atoms? a Atoms combine in whole-number ratios b Atoms are visible under light c Atoms always split in reactions 39 What does the term 'definite proportions' relate to? a Fixed ratio of elements in a compound b Ratio depends on color of compound c Variable ratio of elements in a mixture 40 Which is a simple example of Law of Conservation of Mass? a Sugar + Oxygen yields CO2 + H2O with same mass b Mass of sugar doubles c Mass of oxygen vanishes 41 Dalton’s model suggests atoms combine to form a New elements only b New substances c Only mixtures 42 What does the Law of Multiple Proportions indicate about CO and CO2? a Same ratio of oxygen b No oxygen in the compounds c Different ratios of oxygen 43 Which concept is supported by all three laws mentioned? a Atoms and their combination explain matter b Color change during reactions c Energy conservation only 44 The total mass before a reaction equals a The total mass after b Twice the mass after c Half the mass after 45 Which phrase describes Dalton's atomic theory? a Atoms are the building blocks of matter b Molecules are indivisible c Particles only in liquids 46 Which law ties to fixed composition of compounds? a Conservation of Mass b Multiple Proportions c Definite Proportions 47 What is a key feature of a compound according to these laws? a New properties from combining elements b Same properties as elements c No new properties 48 Which statement is false about Dalton’s theory? a Atoms combine in fixed ratios b Atoms rearrange to form compounds c Atoms can be created during a reaction 49 Which law would you use to predict ratios in a reaction’s products? a Law of Definite Proportions b Law of Conservation of Mass c Law of Random Proportions 50 Which concept relates to mass unchanged in reactions? a Conservation of Mass b Definite Proportions c Multiple Proportions

Dalton's Atomic Theory Quiz 2 ( Form 2, Chemistry )

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Dalton's Atomic Theory Quiz 2 ( Form 2, Chemistry )Version en ligne

par YAKILI LMS

What did Dalton's theory state about atoms?

Which law shows mass is conserved in chemical reactions?

In a chemical reaction, what happens to the total mass?

What does the Law of Definite Proportions state?

Which statement is true about compounds in the law of definite proportions?

What is a key idea of the Law of Multiple Proportions?

Dalton introduced the concept that atoms are indivisible atoms called?

What kind of evidence supported Dalton’s ideas?

If 2 g of hydrogen reacts with 16 g of oxygen to form water, what law is illustrated?

Which statement best describes a compound’s composition according to the law of definite proportions?

Which law explains why CO2 and CO have different ratios of C and O?

Dalton’s theory suggested atoms combine in

What evidence supports constant mass in reactions?

Which concept is part of Dalton’s atomic theory?

What does a chemical formula represent in Dalton's view?

An element’s atoms join to form

Which law ties mass to the total of reactants and products?

What happens to atoms in a chemical reaction according to Dalton?

Which of the following is true about definite proportions?

Which pair best describes the Law of Definite Proportions?

Why did Dalton’s theory use indivisible atoms?

Which law supports that mass is conserved during reactions?

In the Law of Multiple Proportions, what do CO and CO2 illustrate?

What is Dalton’s contribution to chemistry?

If CO has 1 C and 1 O, and CO2 has 1 C and 2 O, what law applies?

Which statement matches the Law of Conservation of Mass?

Dalton proposed atoms combine to form

What does the Law of Definite Proportions apply to?

Which is not part of Dalton’s atomic theory?

Which reaction example shows mass balance?

In a fixed ratio, which is true?

Which term means 'atoms of an element are alike'?

The law of definite proportions is also called?

Which is not a Dalton-era concept?

What do chemical equations uphold?

Which is a consequence of the Law of Multiple Proportions?

Dalton’s atomic theory helped explain

Which statement aligns with experimental evidence of atoms?

What does the term 'definite proportions' relate to?

Which is a simple example of Law of Conservation of Mass?

Dalton’s model suggests atoms combine to form

What does the Law of Multiple Proportions indicate about CO and CO2?

Which concept is supported by all three laws mentioned?

The total mass before a reaction equals

Which phrase describes Dalton's atomic theory?

Which law ties to fixed composition of compounds?

What is a key feature of a compound according to these laws?

Which statement is false about Dalton’s theory?

Which law would you use to predict ratios in a reaction’s products?

Which concept relates to mass unchanged in reactions?