Kanta Jha

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Kanta Jha

Asked: January 31, 2025In: Class 9 Science

The compound FeS is not attracted by magnet because

The compound FeS (Iron(II) sulfide) is not attracted by a magnet because iron has lost its magnetic properties (d). During the chemical reaction between iron and sulfur, a new compound forms, where iron atoms are bonded with sulfur, altering its ...

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Kanta Jha

Asked: January 31, 2025In: Class 9 Science

Out of these, which one is metalloid?

The metalloid among these is (b) Germanium. Metalloids have properties of both metals and non-metals. Germanium is a semiconductor, meaning it conducts electricity under certain conditions, making it useful in electronics. Sodium and magnesium are metals, while oxygen is a ...

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Kanta Jha

Asked: January 31, 2025In: Class 9 Social Science

Two chemical species X and Y combine together to form a product P which contains both X and Y X + Y → P X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following statements concerning the species X, Y and P correct? (i) P is a compound. (ii) X and Y are compounds. (iii) X and Y are elements. (iv) P has a fixed composition.

(d) P is obtained by the combination of X and Y. Thus, it is a compound. X and Y cannot be broken into simpler substances. Thus, they are elements. As P is a compound, it has a fixed composition. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/

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Kanta Jha

Asked: January 31, 2025In: Class 9 Science

Which of the following are physical changes? (i) Melting of iron metal (ii) Rusting of iron (iii) Bending of an iron rod (iv) Drawing a wire of iron metal

(c) Changes (i), (iii) and (iv) are physical in nature because we can get back to the original form by physical methods. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/

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Kanta Jha

Asked: January 31, 2025In: Class 9 Science

Which of the following are homogeneous in nature?

(c) The composition in wood and soil may not be the same throughout, only ice and air are homogeneous. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/

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Kanta Jha

Asked: January 31, 2025In: Class 9 Science

Which of the following is a true solution? (a) Vinegar solution (b) Blood (c) Milk (d) Muddy water

(a) Vinegar (acetic acid) dissolves in water to give a true solution. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/

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Kanta Jha

Asked: January 31, 2025In: Class 9 Science

What is the major compound present in common salt? (a) MgCl₂ (b) NaCl (c) CaCl2 (d) KCl

(b) NaCl is the major compound present in common salt. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/

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Kanta Jha

Asked: January 31, 2025In: Class 9 Science

Which 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)

(b) Pure substances contain one type of particles and have the same composition throughout. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/

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Kanta Jha

Asked: January 31, 2025In: Class 9 Science

Two 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)

(c) Only the statement (ii) that the product will always have a fixed composition. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/

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Kanta Jha

Asked: January 31, 2025In: Class 9 Science

A few substances are arranged in the increasing order of forces of attraction between their particles. Which one of the following represents a correct arrangement ? (a) Water, air, wind (b) Air, sugar, oil (c) Oxygen, water, sugar (d) Salt, juice, air

(c) Solids have the maximum force of attraction between particles followed by liquids followed by gases. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-1/

Kanta Jha

The compound FeS is not attracted by magnet because

Out of these, which one is metalloid?

Which of the following are physical changes? (i) Melting of iron metal (ii) Rusting of iron (iii) Bending of an iron rod (iv) Drawing a wire of iron metal

Which of the following are homogeneous in nature?

Which of the following is a true solution? (a) Vinegar solution (b) Blood (c) Milk (d) Muddy water

What is the major compound present in common salt? (a) MgCl₂ (b) NaCl (c) CaCl2 (d) KCl

A few substances are arranged in the increasing order of forces of attraction between their particles. Which one of the following represents a correct arrangement ? (a) Water, air, wind (b) Air, sugar, oil (c) Oxygen, water, sugar (d) Salt, juice, air

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