Online Test of Chapter 11 Work Energy and Power 2 Science| Class 9th 1. The kinetic energy of a body changes from 12 J to 60 J due to the action of a force of 5N on an object of mass 4 kg. The work done by the force is: (i) 36 J (ii) 60 … Read more
Online Test of Chapter 11 Work Energy and Power 1 Science| Class 9th 1. A body is acted upon by a force 25 N acquires of 2.5 ms-2 and covers a distance of the force. If the body starts from rest, the Kinetic energy acquired by it is? (i) 75 J (ii) 25 J (iii) … Read more
Online Test of Chapter 9 Force and Laws of Motion 2 Science| Class 9th 1. According to Newton’s third law of motion, action and reaction (i) always act on the same body (ii) always act on different bodies in opposite direction (iii) have same magnitudes and direction (iv) act on either body at normal to … Read more
Online Test of Chapter 9 Force and Laws of Motion 1 Science| Class 9th 1. An unbalanced force is necessary for an object to be (i) at reset (ii) in motion with a constant velocity (iii) accelerated (iv) all of the preceding 2. Bags at the top of a school van are tied using a … Read more
NCERT Exemplar Solutions for Ch 2 Is Matter Around us Pure Class 9 Science 1. Suggest separation technique (s) one would need to employ to separate the following mixtures. (a) Mercury and water (b) Potassium chloride and ammonium chloride (c) Common salt, water and sand (d) Kerosene oil, water and salt Solution (a) Separated by … Read more
NCERT Exemplar Solutions for Ch 1 Matter in Our Surroundings Class 9 Science 1. Which one of the following sets of phenomena would increase on raising the temperature? (a) Diffusion, evaporation, compression of gases (b) Evaporation, compression of gases, solubility (c) Evaporation, diffusion, expansion of gases (d) Evaporation, solubility, diffusion, compression of gases Solution Rate … Read more
Questions :- 1. A group of cells having a common origin and performing similar functions is called (a) Cell (b) Tissue (c) Organ (d) System 2. Presence of tissues in a multicellular organisms ensures (a) Faster development (b) Division of labour (c) Higher reproductive potential (d) Body strength 3.Which of the following statements given below … Read more
Questions :- 1. Growing of two or more crops simultaneously on the same piece of land is a)Dis joint cropping b)Alter cropping c)Mixed cropping d)None of these 2. Preventive and control measures adopted for the storage of grains include- a)Strict cleaning b)Proper disjoining c)Fumigation d)All of the above 3. Animal husbandry is the scientific management … Read more
Questions : – 1. Which one of the following is not cause of air pollution? a)Carbon dioxide b)Carbon monoxide c)Oxides of sulphur d)None of these 2. What is Ozone? a)Allotrope of nitrogen b)Part of nitrogen c)Part of ozone d)Allotrope of oxygen 3. Soil erosion is- a)Rainwater harvesting b)Groundwater extraction c)Removal of fertile layer of soil … Read more
Questions :- 1. Which one of the following is not cause of air pollution? a)Carbon dioxide b)Carbon monoxide c)Oxides of sulphur d)None of these 2. What is Ozone? a)Allotrope of nitrogen b)Part of nitrogen c)Part of ozone d)Allotrope of oxygen 3. Soil erosion is- a)Rainwater harvesting b)Groundwater extraction c)Removal of fertile layer of soil d)Avoiding … Read more