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Source of Energy NCERT Solutions NCERT Exercises 1. A solar water heater cannot be used to get hot water on(a) A sunny day(b) A cloudy day(c) A hot day(d) A windy day (b) A cloudy day 2. Which of the following is not an example of a bio-mass energy source?(a) Wood(b) Gobar-gas(c) Nuclear energy(d) Coal […]

Magnetic Effects of Electric Current NCERT Solutions NCERT Exercises 1. Which of the following correctly describes the magnetic field near a long straight wire? (a) The field consists of straight lines perpendicular to the wire. (b) The field consists of straight lines parallel to the wire. (c) The field consists of radial lines originating from

Our Environment NCERT Solutions NCERT Exercise 1. Which of the following groups contain only biodegradable items?a. Grass, flowers and leatherb. Grass, wood and plasticc. Fruit peels, cake and lime juiced. Cake, wood and grass (c) and (d) 2. Which of the following constitute a food-chain?a. Grass, wheat and mangob. Grass, goat and humanc. Goat, cow

Sustainable Management of Natural Resources NCERT Solutions NCERT Exercises 1. What changes would you suggest in your home in order to be environment-friendly? Avoid the usage of plastics and replace it with eco friendly items. Saving electricity by switching off lights and fans. Avoiding the wastage of water. Plant More trees around your home. 2.

Electricity NCERT Solutions NCERT Exercises 1. 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 R/R′ is _____. (a) 1/25 (b) 1/5 (c) 5 (d) 25 (d) 25 2. Which of the

Light- Reflection and Refraction NCERT Solutions NCERT Exercises 1. Which one of the following materials cannot be used to make a lens? (a) Water (b) Glass (c) Plastic (d) Clay (d) Clay 2. The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the

Carbon and it’s compounds NCERT Solutions NCERT Exercises 1. Ethane, with the molecular formula C2H6 has (a) 6 covalent bonds. (b) 7 covalent bonds. (c) 8 covalent bonds. (d) 9 covalent bonds (b)  7 covalent bonds 2. Butanone is a four-carbon compound with the functional group (a) carboxylic acid (b) aldehyde (c) ketone (d) alcohol (c)

Control and Coordination NCERT Solutions NCERT Exercise 1. Which of the following is a plant hormone? (a) Insulin (b) Thyroxin (c) Oestrogen (d) Cytokinin (d) cytokinin 2. The gap between two neurons is called a (a) Dendrite. (b) Synapse. (c) Axon. (d) Impulse (b) Synapse 3. The brain is responsible for (a) Thinking. (b) Regulating

The Human Eye and Colourful World NCERT Solutions NCERT Exercise 1. The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to (a) presbyopia (b) accommodation (c) near-sightedness (d) far-sightedness (b) accommodation 2. The human eye forms an image of an object at its

Life Processes NCERT Solutions NCERT Exercises 1. The kidneys in human beings are a part of the system for (a) nutrition (b) respiration. (c) excretion. (d) transportation excretion 2. The xylem in plants are responsible for (a) transport of water . (b) transport of food. (c) transport of amino acids. (d) transport of oxygen. transport