NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306821
Which one of the phrases would be incorrect to use?
1 A mole of an element
2 A mole of a compound
3 An atom of an element
4 An atom of a compound
Explanation:
An atom of compound is the incorrect usage. Since molecules are the building blocks of a compound, therefore the correct usage would be "A molecule of a compound".
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306822
Which of the following statements about a compound is incorrect?
1 A molecule of a compound has atoms of different elements.
2 A compound cannot be separated into its constituent elements by physical methods of separation.
3 A compound retains the physical properties of its constituent elements.
4 The ratio of atoms of different elements in a compound is fixed.
Explanation:
A compound is a pure substance containing two or more than two elements combined together in a fixed proportion by mass and which can be decomposed into its constituent elements by suitable chemical methods. Further, the properties of a compound are quite different from the properties of constituent elements. e.g., water is a compound containing hydrogen and oxygen combined together in a fixed proportion. But the properties of water are completely different from its constituents, hydrogen and oxygen.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306823
Which of the following consists of two or more than two different types of atoms?
1 Silica
2 Graphite
3 Diamond
4 Ozone
Explanation:
Silica is \(\mathrm{SiO}_{2}\). Diamond & graphite are made up of only carbon atoms. Ozone is made up of only oxygen atoms.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306824
Assertion : In a given compound, the relative number and kind of atoms are constant. Reason : The properties of a compound are completely different from those of its constituent elements.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
According to law of definite proportion, a given compound always contains exactly the same proportion of elements by weight. Thus, in a compound the number and kind of atoms are fixed. Acompound is a totally new substance and differs in properties from that of its constituent elements. So, the option (2) is correct.
306821
Which one of the phrases would be incorrect to use?
1 A mole of an element
2 A mole of a compound
3 An atom of an element
4 An atom of a compound
Explanation:
An atom of compound is the incorrect usage. Since molecules are the building blocks of a compound, therefore the correct usage would be "A molecule of a compound".
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306822
Which of the following statements about a compound is incorrect?
1 A molecule of a compound has atoms of different elements.
2 A compound cannot be separated into its constituent elements by physical methods of separation.
3 A compound retains the physical properties of its constituent elements.
4 The ratio of atoms of different elements in a compound is fixed.
Explanation:
A compound is a pure substance containing two or more than two elements combined together in a fixed proportion by mass and which can be decomposed into its constituent elements by suitable chemical methods. Further, the properties of a compound are quite different from the properties of constituent elements. e.g., water is a compound containing hydrogen and oxygen combined together in a fixed proportion. But the properties of water are completely different from its constituents, hydrogen and oxygen.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306823
Which of the following consists of two or more than two different types of atoms?
1 Silica
2 Graphite
3 Diamond
4 Ozone
Explanation:
Silica is \(\mathrm{SiO}_{2}\). Diamond & graphite are made up of only carbon atoms. Ozone is made up of only oxygen atoms.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306824
Assertion : In a given compound, the relative number and kind of atoms are constant. Reason : The properties of a compound are completely different from those of its constituent elements.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
According to law of definite proportion, a given compound always contains exactly the same proportion of elements by weight. Thus, in a compound the number and kind of atoms are fixed. Acompound is a totally new substance and differs in properties from that of its constituent elements. So, the option (2) is correct.
306821
Which one of the phrases would be incorrect to use?
1 A mole of an element
2 A mole of a compound
3 An atom of an element
4 An atom of a compound
Explanation:
An atom of compound is the incorrect usage. Since molecules are the building blocks of a compound, therefore the correct usage would be "A molecule of a compound".
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306822
Which of the following statements about a compound is incorrect?
1 A molecule of a compound has atoms of different elements.
2 A compound cannot be separated into its constituent elements by physical methods of separation.
3 A compound retains the physical properties of its constituent elements.
4 The ratio of atoms of different elements in a compound is fixed.
Explanation:
A compound is a pure substance containing two or more than two elements combined together in a fixed proportion by mass and which can be decomposed into its constituent elements by suitable chemical methods. Further, the properties of a compound are quite different from the properties of constituent elements. e.g., water is a compound containing hydrogen and oxygen combined together in a fixed proportion. But the properties of water are completely different from its constituents, hydrogen and oxygen.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306823
Which of the following consists of two or more than two different types of atoms?
1 Silica
2 Graphite
3 Diamond
4 Ozone
Explanation:
Silica is \(\mathrm{SiO}_{2}\). Diamond & graphite are made up of only carbon atoms. Ozone is made up of only oxygen atoms.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306824
Assertion : In a given compound, the relative number and kind of atoms are constant. Reason : The properties of a compound are completely different from those of its constituent elements.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
According to law of definite proportion, a given compound always contains exactly the same proportion of elements by weight. Thus, in a compound the number and kind of atoms are fixed. Acompound is a totally new substance and differs in properties from that of its constituent elements. So, the option (2) is correct.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306821
Which one of the phrases would be incorrect to use?
1 A mole of an element
2 A mole of a compound
3 An atom of an element
4 An atom of a compound
Explanation:
An atom of compound is the incorrect usage. Since molecules are the building blocks of a compound, therefore the correct usage would be "A molecule of a compound".
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306822
Which of the following statements about a compound is incorrect?
1 A molecule of a compound has atoms of different elements.
2 A compound cannot be separated into its constituent elements by physical methods of separation.
3 A compound retains the physical properties of its constituent elements.
4 The ratio of atoms of different elements in a compound is fixed.
Explanation:
A compound is a pure substance containing two or more than two elements combined together in a fixed proportion by mass and which can be decomposed into its constituent elements by suitable chemical methods. Further, the properties of a compound are quite different from the properties of constituent elements. e.g., water is a compound containing hydrogen and oxygen combined together in a fixed proportion. But the properties of water are completely different from its constituents, hydrogen and oxygen.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306823
Which of the following consists of two or more than two different types of atoms?
1 Silica
2 Graphite
3 Diamond
4 Ozone
Explanation:
Silica is \(\mathrm{SiO}_{2}\). Diamond & graphite are made up of only carbon atoms. Ozone is made up of only oxygen atoms.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306824
Assertion : In a given compound, the relative number and kind of atoms are constant. Reason : The properties of a compound are completely different from those of its constituent elements.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
According to law of definite proportion, a given compound always contains exactly the same proportion of elements by weight. Thus, in a compound the number and kind of atoms are fixed. Acompound is a totally new substance and differs in properties from that of its constituent elements. So, the option (2) is correct.