CLASS-VIII MATHEMATICS KEY DAY-6 KEY DAY-1 KEY DAY-7 KEY DAY-2 KEY DAY-8 KEY DAY-3 KEY DAY-9 KEY DAY-4 KEY DAY-10 KEY DAY-5 KEY MPC BRIDGE COURSE
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1 MATHEMATICS KEY DAY-1 KEY 1) 3 ) 3) 3 4) 1 5) 6) 1 7) 8) 1 9) 10) 1 11) 1) 3 13) 14) 1 15) 1 16) 3 17) 1 18) 1 19) 1 DAY- KEY 1) 1 ) 4 3) 4 4) 1 5) 4 6) 3 7) 8) 9) 1 10) 1 11) 3 1) 1 13) 14) 1 15) 1 16) 3 17) 3 18) 4 19) 1 0) 1 1) 1 ) 4 DAY-3 KEY 1) 1 ) 3 3) 4 4) 1 5) 6) 7) 3 8) 3 9) 4 10) 3 11) 1 1) 1 13) 1 14) 4 15) 4 16) 1 17) 18) 4 19) 1 DAY-4 KEY 1) 3 ) 4 3) 4) 3 5) 3 6) 1 7) 1 8) 3 9) 1 10) 4 11) 1) 13) 1 14) 3 15) 3 16) DAY-5 KEY 1) ) 1 3) 3 4) 1 5) 4 6) 3 7) 1 8) 9) 4 10) 3 11) 3 1) 1 13) 4 14) 3 15) 1 16) 4 17) 1,,3,4 18) 1 19) 3 0) 3 1) 4 ) 1 3) 3 4) 5) a-s; b-r; c-q; d-r 6) 0 7) 9/7 8) 3 DAY-6 KEY 1) 3 ) 4 3) 3 4) 1 5) 6) 7) 1 8) 3 9) 4 10) 11) 3 1) 1 13) 4 14) 1 15) 1 16) 1 17) 1 18) 4 19) 1 0) 3 1) a-s; b-s; c-q; d-p,r DAY-7 KEY 1) 3 ) 1 3) 4 4) 5) 6) 1 7) 1 8) 1 9) 10) 11) 3 1) 1 13) 1 14) 1 15) DAY-8 KEY 1) 1 ) 1 3) 1 4) 1 5) 3 6) 1 7) 4 8) 1 9) 1 10) 3 11) 1 1) 1 13) 3 14) 1 DAY-9 KEY 1) 1 ) 3) 4 4) 1 5) 3 6) 4 7) 1 8) 9) 1 10) 11) 1 1) 3 13) 3 14) 15) 1 DAY-10 KEY 1) 4 ) 4 3) 3 4) 4 5) 4 6) 4 7) 8) 9) 4 10) 11) 1 1) 13) 14) 3 15) 3 16) 4 17) 18) 4 19) 4 0) 3 1) ) 3) 4) 3 5) 4 10
2 DAY-11 KEY 1) 1 ) 3) 3 4) 1 5) 6) 1 7) 8) 3 9) 10) 4 11) 4 1) 1 13) 1 14) 15) 3 16) 3 DAY-1 KEY 1) ) 3 3) 4) 4 5) 4 6) 7) 8) 3 9) 3 10) 11) 1 1) 1 13) 1 14) 1 DAY-13 KEY 1) 3 ) 1 3) 4) 3 5) 4 6) 3 7) 1 8) 3 9) 3 10) 3 11) 3 1) 13) 14) 1 15) DAY-14 KEY 1) ) 1 3) 3 4) 3 5) 4 6) 7) 3 8) 9) 3 10) 11) 1) 3 13) 1 14) 3 15) 1 16) 17) 4 18) 19) 1 0) 1 1) 1 ) 1 3) 1 4) DAY-15 KEY 1) 1 ) 4 3) 4) 1 5) 4 6) 1 7) 8) 1 9) 4 10) 3 11) 1 1) 13) 1 14) 1 DAY-16 KEY 1) 1 ) 3) 4) 4 5) 6) 4 7) 3 8) 9) 3 10) 3 11) 4 1) 1 13) 3 14) 15) 4 16) 3 17) 18) 19) 4 0) 1 1) 1 ) 3) 5 4) 4 5) 1 6) DAY-17 KEY 1) ) 4 3) 4 4) 4 5) 3 6) 4 7) 3 8) 4 9) 1 10) 1 DAY-18 KEY 1) ) 3) 3 4) 1 5) 3 6) 4 7) 8) 1 9) 10) 11) 1 1) 13) 1 14) 1 15) 1 16) 1 DAY-19 KEY 1) ) 4 3) 4 4) 5) 3 6) 7) 3 8) 9) 1 10) 1 11) 3 1) 1 PHYSICS KEY DAY 1 (WORKSHEET SOLUTIONS) 1) 4 ) 1 3) 3 4) 4 5) 6) 1 7) 8) 3 9) 10) ) ) 4 DAY (WORKSHEET SOLUTIONS) 1) 800 kg/m 3 ) 500 g cm -3 3) The density of wood 800 kg/m 3 4) 1 5) 4000 kg/m 3 6) The density of gold is 19.3 times greater than the density of water. 7) 8.9 8) ) ) m kg DAY 3 (WORKSHEET SOLUTIONS) 1) )3 3)1 4)4 5)4 6) 7)1 8)4 9) 10)1 11)1 1) 13)4 14)4 15)3 16)4 17)3 18)4 19) 0) 1) 4 DAY 4 (WORKSHEET SOLUTIONS) 103
3 ) [ 3 ] 3) [ 1 ] 4)[ 1 ] 5) [ 1 ] 6) [ 4 ] 7)[ 4 ] 8) [ 3 ] 9) [ ] DAY 5 (WORKSHEET SOLUTIONS) 1. [ 1 ].[ ] 3. [ 4 ] 4. [ ] 5.[ 3 ] 6. [ ] 7. [ 3 ] 8. [ 1 ] 9. [ 3 ] DAY 6 (WORKSHEET SOLUTIONS) 1. [ 3 ]. [ 1 ] 3. [ 4 ] 4. [ 1 ] 5. [ 1 ] 6. [ ] 7. [ 1 ] 8. [ ] DAY 7 (WORKSHEET SOLUTIONS) 1. In the graph distance time. So, the object is moving with constant speed.. The displacement-time graph is a straight line inclined to time axis upto time t 0, indicates a uniform velocity. After time t 0, the displacement-time graph is a striaght line parallel to time axis indicates the particle is at rest. 3. At any particular instant, the body can never has two displacements. s 4. Speed in two seconds, v. Speed in time interval to 6 seconds is s s v' Average acceleration v s/ :1 v ' s/4 v t area of trapeziumoabe m/s OE 0 6. Displacement in 0s. algebraic sum of the area under velocity - time graph m 7. Distance travelled in section BC Area covered BC line with time axis. (t t) (v 0 0) t v 0 tv 0 Distance travelled in section AB Area of triangle under AB 1 t v 0 tv 0 Distance travelled in section BC to AB tv 0 : tv 0 1 : 1 : 1 DAY 8 (WORKSHEET SOLUTIONS) 1) ) 3 3) 4) 1 5) 3 6) 7. [ 4 ] 8. [ 3 ] 9.[ ] 10. [ 1 ] DAY 9 (WORKSHEET SOLUTIONS) 1. [ 1 ]. [ ] 3. [ 3 ] 4. [ 4 ] 5. [1] 6. [3] 7. [3]8. [1] DAY 10 (WORKSHEET SOLUTIONS) 1. [3]. [] 3. [1] 4. [1] 5.[ ] 6. [ ] 7. [ 4 ]8. [ 4 ]9. [ 3 ] DAY 11 (WORKSHEET SOLUTIONS) 1. [1]. []3. [1] 4. [3] 5. [] 6. [4]7. []8. [1] 9. [1] DAY 1 (WORKSHEET SOLUTIONS) 1. [3]. [] 3. [1] 4. [3] 5. [1] 6. [3] 7. [1] 8. [1] 9. [3] 10. [1] DAY 13 (WORKSHEET SOLUTIONS) 1. []. [3] 3. [3] 4. [4]5. [1] 6. [] 7. [1] 8. [1] 9. [1] 10. [] DAY 14 (WORKSHEET SOLUTIONS) 1. [1] One pascal is the pressure generated by force of 1N on 1 m. [] A rectangular iron block is kept over a table with different faces touching the table. In different cases, the block exerts same thrust (since weight of the block is same) and different pressure (since area of the block changes) 3. [1] F 16 N, 50 A 50 cm m ; 104
4 P? We know that F P A P pa 300 pa [3] A 00 cm m P 7500 Pa, F? We know that N 550 N F P F P A A 5. [4] F 300 N, P 1500 Pa, A? 6. [1] We know that F F P A m A P ,000cm cm Pressure at any point inside a liquid is directly proportional to density of the liquid. 7. [1] h 10 cm d 1 g / cm 3 g 980 cm/s P hdg dyne / cm 9800 dyne /cm dyne /cm 8. [] Difference in pressure of water at ground floor and third floor ( ) Pa Density of water 1000 kg /m 3 Let h be the height third floor. P hdg hdg P p h 9m dg DAY 15 (WORKSHEET SOLUTIONS) 1. [1] Archimedes principle states that when a body is totally or partially immersed in a fluid the upthrust is equal to the weight of the fluid displaced by it.. [4] A body is lowered into a liquid. The body loses some of its weight. The loss of weight depends upon 1) volume of the body ) density of the liquid 3) acceleration due to gravity 3. [3] We know upthrust V body d liquid g since the two balls are dipped in the same liquid, the two balls will experiance the same upthrust only if they have same volume. 4. [1] Given V body 1m 3, d liquid 1000 kg/m 3 g 10 m/s, Buoyant force F B? We know that, Buoyant force F B V body d liquid g N 10 4 N 5. [1] Given V body 1.6m 3, d liquid 1030 kg/m 3 g 10 m/s, F B? We know, F B V body d liquid g N N 6. [1] Given, weight of the body in air (W 1 ) 700 gf weight of the body in water? Volume of the body 00 cm 3 We know that when a body is completely immersed in a liquid, then it displaces volume of the liquid equal to its own volume. Weight of the displaced liquid (W ) volume of the water displaced 00 gf Weight of the body in water W 1 W 700 gf 00 gf 500 gf 7. [] Here, W air 500 gf W water 300 gf i. Loss in weight of the body W air W water 500 gf 300 gf 00 gf ii. Upthrust on the body loss in wt. of the body 00 gf iii. Volume of the body Volume of the liquid displaced 00 cm 3 8. [] Here, we are given : Area of cross-section of solid, a m Height of cylindrical solid, h 0.60 m Density of solid (d s ) 1500 kg/m 3 Acceleration due to gravity, g 10 m/s 105
5 Density of water, d w 1000 kg/m 3 i. We know, volume of solid Area height a h m 0.60 m m 3 mass of solid volume density V d m kg/m kg weight of solid m g 4.5 kg 10 m/s 45 N ii. We know, volume of water displaced volume of solid m 3 mass of water displaced V d w m kg/m 3 3 kg upthrust m g 3 kg 10 m/s 30 N iii. Apparent weight of solid in water 45 N 30 N 15 N 9. [3] (i) Apparent loss in weight of solid in liquid weight of solid in air weight of solid in liquid kgf (ii) Apparent loss in weight of solid in water weight of solid in air weight of solid in water kgf (iii) RD of liquid loss in weight in liquid loss in weight in water [1] Weight of solid in air 00 gf Weight of solid in water 160 gf Weight of solid in liquid 170 gf Loss of weight of solid in water weight in air weight in water gf Loss of weight of solid in liquid weight in air weight in liquid gf RD of solid weight of solid in air 00 5 loss in weight in water 40 DAY 16 (WORKSHEET SOLUTIONS) 1)3 ) 3)3 4)1 5) 6) 7) 8)1 9)1 10) 11)1 1)3 13)1 14) 15)4 16)1 DAY 17 (WORKSHEET SOLUTIONS) 1)1 ) 3) 4) 5)3 6)3 7)1 8)1 9) 10)1 11)1 1)3 13) 14)1 15)1 16)3 17)1 18) 19)4 0)1 1)1 )3 3)4 4)1 5)1 6)1 DAY 18 (WORKSHEET SOLUTIONS) 1)3 ) 3)1 4) 5)1 6)4 7) 8)1 9) 10)4 11)4 CHEMISTRY KEY ATOMIC STRUCTURE Ans a a,b,c,d b a b b c c b c Q.No Ans d b d c ATOMIC STRUCTURE Ans a d c c b c d b d d Q.No. 11 Ans a BASIC MOLE CONCEPT Ans a a,b a,b b c d d c b,c c Ans a c d d c BASIC MOLE CONCEPT 106
6 Ans a d d a a c b b a b Ans c c c b b,d BASIC MOLE CONCEPT KeytoWorksheet - 3 Ans d b a b b b c c a a Q.No Ans b a a d Ans a d b d c c a d b,c a Ans a a b b b Ans a,d c b b a c b d c a KeytoWorksheet - 3 Ans c a b a c c c b a,c,d a Ans a d a d a KeytoWorksheet - 4 Ans c c a c b b d a c b 16 Ans c a a a a a CHEMICAL BONDING Ans c c b c c d d a c a,b Ans d a c d a CHEMICAL BONDING Ans c c c a d d d d c d Q.No Ans c c a,b,c,d c CHEMICAL BONDING Ans a b c b a d b a d a Q.No Ans b a c BEHAVIOUR OF GASEOUS Day- 13- Behaviour of Gases- Solutions Ans c a,b,c,d b d d Sol Sol a c a Q.No Ans b d c BEHAVIOUR OF GASEOUS 107
7 Ans a,b,c,d a d b c a b c d d Q.No Day- 14- Behaviour of gases - Solutions Ans b b c BEHAVIOUR OF GASEOUS Day Behaviour of Gases - Solutions Ans c a b b a,b Sol Sol d a,b a Q.No Ans c c a *** 108
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