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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/

Poll

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/

Poll

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/

Poll

chirag345

Asked: January 31, 2025In: Class 12 Maths

Given that A is a square matrix of order 3 and |A| = -4, then |adj. A| is equal to:

A square matrix is a matrix with an equal number of rows and columns. It is represented as an “n × n” matrix where “n” is the number of rows and columns. Square matrices are essential in linear algebra and ...

Poll

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/

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

Given that A is a square matrix of order 3 and |A| = -4, then |adj. A| is equal to:

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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