306657
Statement A : Equal moles of different substances contain same number of constituent particles. Statement B : Equal weights of different substances contain the same number of constituent particles.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Equal moles of different substances contain same number of constituent particles but equal weights of different substances do not contain the same number of constituent particles.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306658
In the reaction, \({{\rm{N}}_{\rm{2}}}{\rm{ + 3}}{{\rm{H}}_{\rm{2}}} \to {\rm{2N}}{{\rm{H}}_{\rm{3}}}\), the ratio of volumes of nitrogen, hydrogen and ammonia is 1 : 3 : 2. These figures illustrate the law of
1 Constant proportions
2 Gay - Lussac
3 Multiple proportions
4 Reciprocal proportions
Explanation:
Gay Lussac’s Law of Combining Volumes states that when gases react, they do so in volumes which bear a simple ratio to one another, and to the volume of the product(s) formed if gaseous, at constant temperature and pressure.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306659
Assertion : The ratio by volume of gaseous reactants and products is in agreement with their molar ratio. Reason : Volume of a gas is inversely proportional to the number of moles of a gas.
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:
The assertion is true as volume ratios in gaseous reactions align with molar ratios due to Avogadro's law, but the reason is false; the correct statement is that "volume of a gas is directly proportional to the number of moles of a gas". So, the option (3) is correct.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306660
Which of the following is the best example of law of conservation of mass?
1 12 g of carbon combines with 32 g of oxygen to form 44 g of \({\rm{C}}{{\rm{O}}_{\rm{2}}}\)
2 When 12 g of carbon is heated in a vacuum there is no change in mass
3 A sample of air increases in volume when heated at constant pressure but its mass remains unaltered
4 The weight of a piece of platinum is the same before and after heating in air
Explanation:
According to the law of conservation of mass, Total mass of reaction = Total mass of products Given, \({\rm{C + }}{{\rm{O}}_{\rm{2}}} \to {\rm{C}}{{\rm{O}}_{\rm{2}}}\) Total mass of reactions = 12 + 32 = 44 g Total mass of products = 44 g
306657
Statement A : Equal moles of different substances contain same number of constituent particles. Statement B : Equal weights of different substances contain the same number of constituent particles.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Equal moles of different substances contain same number of constituent particles but equal weights of different substances do not contain the same number of constituent particles.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306658
In the reaction, \({{\rm{N}}_{\rm{2}}}{\rm{ + 3}}{{\rm{H}}_{\rm{2}}} \to {\rm{2N}}{{\rm{H}}_{\rm{3}}}\), the ratio of volumes of nitrogen, hydrogen and ammonia is 1 : 3 : 2. These figures illustrate the law of
1 Constant proportions
2 Gay - Lussac
3 Multiple proportions
4 Reciprocal proportions
Explanation:
Gay Lussac’s Law of Combining Volumes states that when gases react, they do so in volumes which bear a simple ratio to one another, and to the volume of the product(s) formed if gaseous, at constant temperature and pressure.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306659
Assertion : The ratio by volume of gaseous reactants and products is in agreement with their molar ratio. Reason : Volume of a gas is inversely proportional to the number of moles of a gas.
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:
The assertion is true as volume ratios in gaseous reactions align with molar ratios due to Avogadro's law, but the reason is false; the correct statement is that "volume of a gas is directly proportional to the number of moles of a gas". So, the option (3) is correct.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306660
Which of the following is the best example of law of conservation of mass?
1 12 g of carbon combines with 32 g of oxygen to form 44 g of \({\rm{C}}{{\rm{O}}_{\rm{2}}}\)
2 When 12 g of carbon is heated in a vacuum there is no change in mass
3 A sample of air increases in volume when heated at constant pressure but its mass remains unaltered
4 The weight of a piece of platinum is the same before and after heating in air
Explanation:
According to the law of conservation of mass, Total mass of reaction = Total mass of products Given, \({\rm{C + }}{{\rm{O}}_{\rm{2}}} \to {\rm{C}}{{\rm{O}}_{\rm{2}}}\) Total mass of reactions = 12 + 32 = 44 g Total mass of products = 44 g
306657
Statement A : Equal moles of different substances contain same number of constituent particles. Statement B : Equal weights of different substances contain the same number of constituent particles.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Equal moles of different substances contain same number of constituent particles but equal weights of different substances do not contain the same number of constituent particles.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306658
In the reaction, \({{\rm{N}}_{\rm{2}}}{\rm{ + 3}}{{\rm{H}}_{\rm{2}}} \to {\rm{2N}}{{\rm{H}}_{\rm{3}}}\), the ratio of volumes of nitrogen, hydrogen and ammonia is 1 : 3 : 2. These figures illustrate the law of
1 Constant proportions
2 Gay - Lussac
3 Multiple proportions
4 Reciprocal proportions
Explanation:
Gay Lussac’s Law of Combining Volumes states that when gases react, they do so in volumes which bear a simple ratio to one another, and to the volume of the product(s) formed if gaseous, at constant temperature and pressure.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306659
Assertion : The ratio by volume of gaseous reactants and products is in agreement with their molar ratio. Reason : Volume of a gas is inversely proportional to the number of moles of a gas.
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:
The assertion is true as volume ratios in gaseous reactions align with molar ratios due to Avogadro's law, but the reason is false; the correct statement is that "volume of a gas is directly proportional to the number of moles of a gas". So, the option (3) is correct.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306660
Which of the following is the best example of law of conservation of mass?
1 12 g of carbon combines with 32 g of oxygen to form 44 g of \({\rm{C}}{{\rm{O}}_{\rm{2}}}\)
2 When 12 g of carbon is heated in a vacuum there is no change in mass
3 A sample of air increases in volume when heated at constant pressure but its mass remains unaltered
4 The weight of a piece of platinum is the same before and after heating in air
Explanation:
According to the law of conservation of mass, Total mass of reaction = Total mass of products Given, \({\rm{C + }}{{\rm{O}}_{\rm{2}}} \to {\rm{C}}{{\rm{O}}_{\rm{2}}}\) Total mass of reactions = 12 + 32 = 44 g Total mass of products = 44 g
306657
Statement A : Equal moles of different substances contain same number of constituent particles. Statement B : Equal weights of different substances contain the same number of constituent particles.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Equal moles of different substances contain same number of constituent particles but equal weights of different substances do not contain the same number of constituent particles.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306658
In the reaction, \({{\rm{N}}_{\rm{2}}}{\rm{ + 3}}{{\rm{H}}_{\rm{2}}} \to {\rm{2N}}{{\rm{H}}_{\rm{3}}}\), the ratio of volumes of nitrogen, hydrogen and ammonia is 1 : 3 : 2. These figures illustrate the law of
1 Constant proportions
2 Gay - Lussac
3 Multiple proportions
4 Reciprocal proportions
Explanation:
Gay Lussac’s Law of Combining Volumes states that when gases react, they do so in volumes which bear a simple ratio to one another, and to the volume of the product(s) formed if gaseous, at constant temperature and pressure.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306659
Assertion : The ratio by volume of gaseous reactants and products is in agreement with their molar ratio. Reason : Volume of a gas is inversely proportional to the number of moles of a gas.
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:
The assertion is true as volume ratios in gaseous reactions align with molar ratios due to Avogadro's law, but the reason is false; the correct statement is that "volume of a gas is directly proportional to the number of moles of a gas". So, the option (3) is correct.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY
306660
Which of the following is the best example of law of conservation of mass?
1 12 g of carbon combines with 32 g of oxygen to form 44 g of \({\rm{C}}{{\rm{O}}_{\rm{2}}}\)
2 When 12 g of carbon is heated in a vacuum there is no change in mass
3 A sample of air increases in volume when heated at constant pressure but its mass remains unaltered
4 The weight of a piece of platinum is the same before and after heating in air
Explanation:
According to the law of conservation of mass, Total mass of reaction = Total mass of products Given, \({\rm{C + }}{{\rm{O}}_{\rm{2}}} \to {\rm{C}}{{\rm{O}}_{\rm{2}}}\) Total mass of reactions = 12 + 32 = 44 g Total mass of products = 44 g
