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The percentage of copper and oxygen in samples of “CuO” obtained by different methods were found to be the same. This illustrates the law of:

• Constant proportions

• Conservation of mass

• Multiple proportions

• Reciprocal proportions

Tags

NGSS.HS-PS1-7

A balanced chemical equation is in accordance with:

• Avogadro's law

• Law of conservation of mass

• Law of multiple proportions

• Law of reciprocal proportions

Tags

NGSS.HS-PS1-7

Name of the scientist who postulated law of conservation of matter

• J.J.Thomson

• Antoine Lavoisier

• Joseph Louis Proust

• None of the above

Tags

NGSS.HS-PS1-7

An unbalanced chemical reaction represents a violation of which law?

• Law of multiple proportions

• Avogadro's law

• Law of reciprocal proportions

• None of the above

Tags

NGSS.HS-PS1-7

Law of constant proportion is also referred to as law of definite proportion

• True

• False

Name the scientist who put forth the law of constant proportion

• Rutherford

• Newton

• Antoine lavoisier

• J.L.Proust

What is the ratio of C:O in CO2?

• 4:8

• 3:7

• 8:4

• 2:4

Tags

NGSS.MS-PS1-1

The ratio of constituent elements in water from different sources are not always the same

• True

• False

Tags

NGSS.HS-ESS2-5

2 elements C & D combines to form a compound CD. The same compound is obtained from different experiment. give the law in accordance to above observation

• law of conservation of mass

• law of constant proportion

• law of multiple proportion

Tags

NGSS.HS-PS1-7

The percentage of copper and oxygen in samples of “CuO” obtained by different methods were found to be the same. This illustrates the law of:

• Constant proportions

• Conservation of mass

• Multiple proportions

• Reciprocal proportions