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Distance of the point (α, β, γ) from yz-plane is
The yz-plane is defined by the equation x = 0, meaning that for any point on the yz-plane, the x-coordinate is 0. The distance of a point (α, β, γ) from the yz-plane is the absolute value of its x-coordinate because the yz-plane is perpendicular to the x-axis. Therefore, the distance of the point (αRead more
The yz-plane is defined by the equation x = 0, meaning that for any point on the yz-plane, the x-coordinate is 0.
The distance of a point (α, β, γ) from the yz-plane is the absolute value of its x-coordinate because the yz-plane is perpendicular to the x-axis.
Therefore, the distance of the point (α, β, γ) from the yz-plane is:|α|
Thus, the correct answer is: |α|
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Which of the following is a true solution? (a) Vinegar solution (b) Blood (c) Milk (d) Muddy water
The correct answer is: (a) Vinegar solution. A true solution is a homogeneous mixture where solute particles are completely dissolved in the solvent and cannot be seen under a microscope. Vinegar is a true solution of acetic acid in water, making it a homogeneous mixture. https://www.tiwariacademy.cRead more
The correct answer is: (a) Vinegar solution. A true solution is a homogeneous mixture where solute particles are completely dissolved in the solvent and cannot be seen under a microscope. Vinegar is a true solution of acetic acid in water, making it a homogeneous mixture.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/
See lessWhat is the major compound present in common salt? (a) MgCl₂ (b) NaCl (c) CaCl2 (d) KCl
The correct answer is: (b) NaCl. Common salt, also known as table salt, is primarily composed of sodium chloride (NaCl). It is an ionic compound made of sodium (Na⁺) and chloride (Cl⁻) ions, essential for human health and widely used in food and industry. https://www.tiwariacademy.com/ncert-solutionRead more
The correct answer is: (b) NaCl. Common salt, also known as table salt, is primarily composed of sodium chloride (NaCl). It is an ionic compound made of sodium (Na⁺) and chloride (Cl⁻) ions, essential for human health and widely used in food and industry.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/
See lessWhich of the following statements are correct for pure substances? (i) Pure substances contain only one kind of particles. (ii) Pure substances may be compounds or mixtures. (iii) Pure substances have the same composition throughout. (iv) Pure substances can be exemplified by all elements other than copper. (a) (i) and (ii) (b) (i) and (iii) (c) (iii) and (iv) (d) (ii) and (iii)
The correct answer is: (b) (i) and (iii). Pure substances contain only one kind of particles, either atoms or molecules. Pure substances have a uniform composition throughout. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/
The correct answer is: (b) (i) and (iii).
Pure substances contain only one kind of particles, either atoms or molecules.
Pure substances have a uniform composition throughout.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/
See lessTwo substances A and B were made to react to form a third substance A₂B according to the following reaction: 2A + B → A₂B Which of the following statements concerning this reaction are incorrect? (i) The product A₂B shows the properties of the substances A and B. (ii) The product will always have a fixed composition. (iii) The product so formed cannot be classified as a compound. (iv) The product so formed is an element. (a) (i), (ii) and (iii) (b) (i), (ii) and (iv) (c) (i), (iii) and (iv) (d) (ii), (iii) and (iv)
The correct answer is: (c) (i), (iii), and (iv) (i) Incorrect – The product A₂B is a new substance with different properties from A and B. (ii) Correct – Compounds always have a fixed composition. (iii) Incorrect – A₂B is a compound because it is formed by the chemical combination of A and B. (iv) IRead more
The correct answer is: (c) (i), (iii), and (iv)
(i) Incorrect – The product A₂B is a new substance with different properties from A and B.
(ii) Correct – Compounds always have a fixed composition.
(iii) Incorrect – A₂B is a compound because it is formed by the chemical combination of A and B.
(iv) Incorrect – A compound is different from an element; A₂B is not an element.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/
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