NCERT Class 10 Science Solutions: Heredity and Evolution Question:  In evolutionary terms, we have more in common with A. a Chinese school-boy. B. a chimpanzee. C. a spider. D. a bacterium. Concept in a Minute: Evolutionary relationships are determined by common ancestry. Organisms that share a more recent common ancestor will have more in common […]

NCERT Class 10 Science Solutions: Electricity Question: A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R’, then the ratio $RR’$ is ______. A. $125$ B. $15$ C. 5 D. 25 Concept in a Minute: This

NCERT Class 10 Science Solutions: Control and Coordination Question: The gap between two neurons is called a ______. A. dendrite B. synapse C. axon D. impulse Concept in a Minute: Neurons are specialized cells that transmit information in the nervous system. They communicate with each other at junctions called synapses. Explanation: A synapse is the

NCERT Class 10 Science Solutions: Chemical Reactions and Equations Question: What happens when dilute hydrochloric acid is added to iron fillings? Choose the correct answer. A. Hydrogen gas and iron chloride are produced. B. Chlorine gas and iron hydroxide are produced. C. No reaction takes place. D. Iron salt and water are produced. Concept in

NCERT Class 10 Science Solutions: Carbon and Its Compounds Question: Ethane, with the molecular formula C2H6 has ______. A. 6 covalent bonds. B. 7 covalent bonds. C. 8 covalent bonds. D. 9 covalent bonds. Concept in a Minute: The question is about determining the number of covalent bonds in a molecule of ethane (C2H6). To

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°.