Skip to content Work Energy and power NCERT Exercises Question 1.The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative:(a) work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket.(b) work done by […]
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Laws of motion NCERT Exercises Question 1.[For simplicity in numerical calculations, take g= 10 m s-2]Give the magnitude and direction of the net force acting on(a) a drop of rain falling down with a constant speed,(b) a cork of mass 10 g floating on water,(c) a kite skillfully held stationary in the sky,(d) a car
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Motion in a plane NCERT Exercises Question 1.State, for each of the following physical quantities, if it is a scalar or a vector: volume, mass, speed, acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity. Answer:Scalars : volume, mass, speed, density, number of moles, angular frequency.Vectors: Acceleration, velocity, displacement, angular velocity. Question 2.Pick out the
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Motion in a Straight Line NCERT Exercises Question 1.In which of the following examples of motion, can the body be considered approximately a point object:(a) a railway carriage moving without jerks between two stations.(b) a monkey sitting on top of a man cycling smoothly on a circular track.(c) a spinning cricket ball that turns sharply
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Units and Measurements Question 1.Fill in the blanks(a) The volume of a cube of side 1 cm is equal to ….m3.(b) The surface area of a solid cylinder of radius 2.0 cm and height 10 cm is equal to ….(mm)2.(c) A vehicle moving with a speed of 18 km h-1 … m in 1 s.(d) The
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Physical World NCERT Exercises Question 1.Some of the most profound statements on the nature of science have come from Albert Einstein, one of the greatest scientists of all time. What do you think did Einstein mean when he said :”The most incomprehensible thing about the world is that it is comprehensible”? Answer:The physical world, when
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Environmental Chemistry NCERT Exercises Question 1.Define environmental chemistry. Solution.The environment around us is made up of chemical species which undergo chemical reactions constantly e.g., photosynthesis in plants, formation of ozone in stratosphere, etc. Environmental chemistry deals with the study of such reactions which take place in the origin, transport and life-cycle of chemical species in
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Hydrocarbons NCERT Exercises Question 1.How do you account for the formation of ethane during chlorination of methane? Solution.This is how ethane is generated during the chlorination of methane. Question 2.Write IUPAC names of the following compounds: Solution. Question 3.For the following compounds, write structural formulae and IUPAC names of all possible isomers having the number
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Organic Chemistry: Some Basic Principles and Techniques NCERT Exercises Question 1.What are hybridization states of each carbon atom in the following compounds? Solution. Question 2.Indicate the σ and π bonds in the following molecules: Solution. Question 3.Write bond line formulas for: Isopropyl alcohol, 2,3-Dimethylbutanal, Heptan-4-one. Solution. Question 4.Give the IUPAC names following compounds: Solution. Question
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The p-Block Elements NCERT Exercises Question 1.Discuss the pattern of variation in oxidation states of(i) B to TI and(ii) C to Pb. Solution.The aspect common in the variation of oxidation state within group 13 (B to Tl) and group 14 (C to Pb) is that of inert pair effect. As we move down the group (13 or
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