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NCERT Class 10 Science Solutions: Acids, Bases and Salts Question: A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains ______. A. NaCl B. HCl C. LiCl D. KCl Concept in a Minute: Acids react with carbonates to produce carbon dioxide gas. Carbon dioxide gas turns lime water […]

NCERT Class 10 Maths Solutions: Triangles Question: All circles are ______. A. congruent B. similar Concept in a Minute: Similar figures are figures that have the same shape but may differ in size. Corresponding angles are equal and corresponding sides are in the same ratio. Congruent figures are figures that have the same shape and

NCERT Class 10 Maths Solutions: Surface Areas and Volumes Question: A toy is in the form of a cone of radius 3.5 cm mounted on a hemisphere of same radius. The total height of the toy is 15.5 cm. Find the total surface area of the toy [Use π =$227$] Concept in a Minute: The

NCERT Class 10 Maths Solutions: Statistics Question: A survey was conducted by a group of students as a part of their environment awareness programme, in which they collected the following data regarding the number of plants in 20 houses in a locality. Find the mean number of plants per house. Number of plants 0 –

NCERT Class 10 Maths Solutions: Some Applications of Trigonometry Question: A statue, 1.6 m tall, stands on a top of pedestal, from a point on the ground, the angle of elevation of the top of statue is 60° and from the same point the angle of elevation of the top of the pedestal is 45°.

NCERT Class 10 Maths Solutions: Real Numbers Question: Express the number as a product of its prime factor: 7429 Concept in a Minute: Prime factorization is the process of breaking down a composite number into its prime factors. A prime number is a natural number greater than 1 that has no positive divisors other than

NCERT Class 10 Maths Solutions: Quadratic Equations Question:  Find two consecutive positive integers, sum of whose squares is 365. Concept in a Minute: Quadratic Equations: Understanding how to form and solve quadratic equations from word problems. This involves setting up an equation with a variable representing the unknown integer(s) and then manipulating it into the

NCERT Class 10 Maths Solutions: Probability Question: Are the arguments in the following sentence correct or not correct? Give a reason for your answer. If two coins are tossed simultaneously there are three possible outcomes, two heads, two tails or one of each. Therefore, for each of these outcomes, the probability is $13.$ A. Correct

NCERT Class 10 Maths Solutions: Polynomials Question: Find the zeroes of the following quadratic polynomial and verify the relationship between the zeroes and the coefficients: x2 – 2x – 8 Concept in a Minute: To find the zeroes of a quadratic polynomial, we set the polynomial equal to zero and solve for the variable. This

NCERT Class 10 Maths Solutions: Pair of Linear Equations in Two Variables Question: On comparing the ratios $𝐚𝟏𝐚𝟐,𝐛𝟏𝐛𝟐$ and $𝐜𝟏𝐜𝟐$, find out whether the following pair of linear equations are consistent, or inconsistent. 3x + 2y = 5 ; 2x – 3y = 7 Concept in a Minute: To determine if a pair of linear