CLASS: IX SUB: CHEMISTRY

1-Explain the different postulates of Dalton’s Atomic theory.

2-What is atomicity? Define monoatomic, diatomic and triatomic molecules with examples.

3-Write the chemical formulae of any 20 chemical compounds.

4-Differentiate atoms and molecules.

5-Differentiate true solution, colloidal solution and suspension.

6-Give any three differences between mixture and compounds.

7-Explain the following :(a)Concentration of solution (b)Saturated Solution(c)Suspension

8-Convert following temp. in kelvin: 250c, 00C, 270C

9-Write answers and learned all exercise questions of chapter 1 &2 of chemistry. NUMBER SYSTEMS Q1. FIND SIX RATIONAL NUMBERS BETWEEN 3 AND 4. & BETWEEN 3/5 AND 1/3. Q2. LOCATE ON THE NUMBER LINE . Q3. EXPRESS THE FOLLOWING IN THE FORM P/Q , WHERE P AND Q ARE INTEGERS AND Q 0 . Q4. REPRESENT ON THE NUMBER LINE. Q5. RATIONALISE THE DENOMINATOR OF THE FOLLOWING (i) . Q6. SIMPLIFY (i) POLYNOMIALS Q1. WRITE THE DEGREE OF EACH OF THE FOLLOWING POLYNOMIALS (i) 5 x3 + 4 x2 + 7 x , (ii) 4 –y2 ,(iii) 5t - &(iv) 3 Q2. FIND P(0), P(1) & P(-1) OF POLYNOMIAL 5 x - 4 x2 + 7 . Q3. DIVIDE THE POLYNOMIAL 3x4 – 4x3 - 3x - 1 BY x-1 AND x3 + 1 BY x + 1 . Q4. FIND THE REMINDER WHEN x4 – 3x3 + 3x + 1 IS DIVIDED BY x + 1 & x - . Q5. FIND THE VALUE OF k , IF x- 1 IS A FACTOR OF 4x3 + 3x2 - 4x + k . Q6. FACTORISE : (i) 12x2 – 7x + 1 (ii) 2x2 + 7x + 3 (iii) x3 + 13x2 + 32x + 20 (iv) x3 - 23x2 + 142x – 120. Q7. EVALUATE THE FOLLOWING USING SUITABLE IDENTITIES (i) 103 × 107 (ii) . Q8. FACTORISE (i) 9x2 + 6xy + y2 (ii) 4x2 + 9y2 + 16z2 +12xy -24yz -16xz (iii) 64a3 -27b3 – 144a2b + 108ab2 (iv) 27x3 + y3 + z3 -9xyz. Q9. EXPAND (i) . Q10. VERIFY THAT . Q11. IF SHOW THAT . Q12. WITHOUT ACTUALLY CALCULATING FIND THE VALUES (i) (-12)3 + (7)3 + (5)3 (ii) (28)3 + (-15)3 + (-13)3 . COORDINATE GEOMETRY & LINEAR EQUATIONS IN TWO VARIABLES Q1. IN WHICH QUADRANT OR ON WHICH AXIS DO EACH OF THE POINTS (-2 , 4),(3 , -1) ,(-1 , 0), (1,-2) & (-3,-5) LIE.ALSO LOCATE THEM. Q2. WRITE FOUR SOLUTIONS OF 2x – y = - 7 & x – 3y = 8. Q3. DRAW THE GRAPH OF (i) 2x + y = 3 , (ii) Y = - 5x – 3. Q4. IF THE POINT (3 , -4) LIES ON THE GRAPH OF THE EQUATION 3y = ax + 7 , FIND THE VALUE OF a. Q5. THE TAXI FARE IN A CITY IS AS FOLLOWS : FOR THE FIRST KILOMETRE, THE FARE IS RS 12 AND FOR THE SUBSEQUENT DISTANCE IT IS RS 9 PER KM. TAKING THE DISTANCE COVERED AS X KM AND TOTAL FARE AS RS Y, WRITE A LINEAR EQUATION FOR THIS INFORMATION AND DRAW ITS GRAPH. EUCLID’S GEOMETRY

Q1. WRITE ANY TWO DEFINITIONS , AXIOMS AND FIFTH POSTULATE OF EUCLID’S GEOMETRY.

Q2. IF A POINT C LIES BETWEEN TWO POINTS A & B SUCH THAT AC = BC , THEN PROVE THAT AC = AB AND ALSO PROVE THAT EVERY LINE SEGMENT HAS ONE AND ONLY ONE MID POINT.

Q3. IN FIGURE IF AC =BD ,THEN PROVE THAT AB =CD A B C D LINES AND ANGLES

Q1. IF TWO LINES INTERSECT EACH OTHER THEN VERTICALLY OPPOSITE ANGLES ARE EQUAL , PROVE IT. Q2. THE SUM OF ANGLES OF A TRIANGLE IS 1800 , PROVE IT. Q3. IN ANY TRIANGLE THE EXTERIOR ANGLE IS EQUAL TO THE SUM OF THE TWO INTERIOR OPPOSITE ANGLES , PROVE IT. Q4. IF FIGURE ∠ PQR = ∠ PRQ ,THEN PROVE THAT ∠ PQS = ∠ PRT (Q4) Q5. IN FIGURE ,POQ IS A LINE . RAY OR IS PERPENDICULAR TO LINE PQ. OS IS ANOTHER RAY LYING BETWEEN RAYS OP AND OR . PROVE THAT ∠ ROS = (∠ QOS – ∠POS) (Q5) Q6. IN FIG. LINES XY AND MN INTERSECT AT O . IF ∠POY = 900 AND a:b = 2:3 FIND c. Q7. IN FIG. IF AB CD , EF CD AND ∠ GED = 1260 ,FIND ∠AGE, ∠GEF & ∠FGE. (Q7) (Q6) Q8. IN FIG. IF AB CD , ∠ APQ = 500 & ∠PRD = 1270 ,FIND x & y. Q9. IN FIG. ∠ X = 620 , ∠ XYZ = 540 , IF YO & ZO ARE THE BISECTOR OF (Q8) ∠ XYZ & ∠ XZY RESPECTIVELY OF ∆XYZ , FIND ∠ OZY & ∠ YOZ. (Q9)

Q10. IN FIG. THE SIDE QR OF ∆PQR IS PRODUCED TO A POINT S, IF THE BISECTOR OF ∠ PQR & ∠ PRS MEET AT POINT T, THEN PROVE THAT ∠ QTR = ∠ QPR. (Q10) Q11. IN FIG. SIDE AB AND AC OF ∆ABC ARE PRODUCED TO POINTS E & D RESPECTIVELY, IF BISECTORS BO AND CO OF ∠ CBE & ∠ BCD RESPECTIVELY MEET AT POINT O , THEN PROVE THAT ∠ BOC = 90O - ∠ BAC . ( Q11) TRIANGLES Q1. TWO TRIANGLES ARE CONGRUENT IF TWO ANGLES AND THE INCLUDED SIDE OF ONE TRIANGLE ARE EQUAL TO TWO ANGLES AND THE INCLUDED SIDE OF OTHER TRIANGLE , PROVE IT. Q2. ANGLES OPPOSITE TO EQUAL SIDES OF AN ISOSCELES TRIANGLE ARE EQUAL , PROVE IT. Q3. SIDES OPPOSITE TO EQUAL ANGLES OF AN ISOSCELES TRIANGLE ARE EQUAL , PROVE IT. (Q5) Q4. TWO SIDES AB AND BC AND MEDIAN AM OF ONE TRIANGLE ABC ARE RESPECTIVELY EQUAL TO SIDES PQ AND QR AND MEDIAN PN OF TRIANGLE PQR . SHOW THAT (i) ∆ABM ≅ ∆PQN (ii) ∆ABC ≅ ∆PQR Q5. ABCD IS A QUADRILATERAL IN WHICH AD = BC AND ∠DAB = ∠CBA. PROVE THAT (i) ∆ABD ≅ ∆BAC (ii) BD = AC (iii) ∠ ABD = ∠ BAC (Q6) (Q7) Q6. IN FIG. AC = AE , AB = AD & ∠ BAD = ∠ EAC . SHOW THAT BC = DE. Q7. AB IS A LINE SEGMENT AND P ITS MID POINT .D AND E ARE POINTS ON THE SAME SIDE OF AB SUCH THAT ∠BAD = ∠ABE ∠ EPA = ∠ DPB . SHOW THAT (i) ∆DAP ≅ ∆EBP (ii) AD = BE. Q8. ABC IS A TRIANGLE IN WHICH ALTITUDES BE AND CF TO SIDES AC AND AB ARE EQUAL . (Q8) SHOW THAT (i) ∆ABE ≅ ∆ACF (ii) ABC IS AN ISOSCELES TRIANGLE. Q9. ∆ABC IS AN ISOSCELES TRIANGLE IN WHICH AB = AC. SIDE BA IS PRODUCED TO D (Q9) SUCH THAT AD = AB. SHOW THAT ∠ BCD IS A RIGHT ANGLE. Q10. AB AND CD ARE RESPECTIVELY THE SMALLEST AND LONGEST SIDES OF A QUADRILATERAL ABCD. SHOW THAT ∠A > ∠C AND ∠B > ∠D. (Q10) QUADRILATERALS Q1. A DIAGONAL OF A PARALLELOGRAM DIVIDES IT IN TO TWO CONGRUENT TRIANGLES . PROVE IT. Q2. IF THE DIGONALS OF A QUADRILATERAL BISECT EACH OTHER , THEN IT IS A PARALLELOGRAM. PROVE IT. Q3. A QUADRILATERAL IS A PARALLELOGRAM IF A PAIR OF OPPOSITE SIDES IS EQUAL AND PARALLEL. PROVE IT. Q4. THE ANGLES OF QUADRILATERAL ARE IN RATIO 3 : 5 : 9 : 13 . FIND ALL THE ANGLES OF THE QUADRILATERAL. Q5. IF THE DIGONAL OF A PARALLELOGRAM ARE EQUAL , THEN SHOW THAT IT IS A RECTANGLE. Q6. SHOW THAT IF THE DIAGONALS OF A QUADRILATERAL BISECT EACH OTHER AT RIGHT ANGLES THEN IT IS A RHOMBUS. Q7. SHOW THAT THE DIAGONALS OF A SQUARE ARE EQUAL AND BISECT EACH OTHER AT RIGHT ANGLE. Q8. ABCD IS A RHOMBUS . SHOW THAT DIAGONAL AC BISECT ∠A AS WELL AS ∠C AND DIAGONAL BD BISECT ∠B AS WELL AS ∠C. Q9. ABCD IS A AND AP AND CQ ARE PERPENDICULARS FROM VERTICES A AND C ON DIAGONAL BD. SHOW THAT (i) ∆APB ≅ ∆CQD (ii) AP = CQ Q10. ABCD IS A TRAPEZIUM IN WHICH AB CD AND AD=BC .SHOW THAT (i) ∠A = ∠B (ii) ∠C = ∠D (iii) ∆ABC ≅ ∆BAD (iv) AC = BD. Q11. PROVE THAT IN A TRIANGLE THE LINE SEGMENT JOINING THE MID POINTS OF ANY TWO SIDES IS PARALLEL TO THE THIRD SIDE & IS HALF OF IT. Q12. IN THE FIG, DIAGONAL AC OF A PARALLELOGRAM ABCD BISECTS . SHOW THAT I) IT BISECTS ALSO II) ABCD IS A RHOMBUS Q13. ABCD IS A RHOMBUS AND P, Q, R AND S ARE THE MID-POINTS OF THE SIDES AB, BC, CD (Q12) AND DA RESPECTIVELY. SHOW THAT THE QUADRILATERAL PQRS IS A RECTANGLE. Q14. ABC IS A TRIANGLE RIGHT ANGLE AT C. A LINE THROUGH THE MID POINT M OF HYPOTENUSE AB AND PARALLEL TO BC INTERSECT AC AT D. SHOW THAT (i) D IS MID POINT OF AC (ii) MD AC (iii) CM = MA = AB. AREA OF PARALLELOGRAMS AND TRIANGLES Q1. PROVE THAT THE PARALLELOGRAMS ON THE SAME BASE BETWEEN THE SAME PARALLELS ARE EQUAL IN AREA. Q2. PROVE THAT THE TWO TRIANGLES HAVING THE SAME BASE AND BETWEEN THE SAME PARALLELS ARE EQUAL IN AREA. Q3. IN THE FIG, E IS THE MID- POINT ON MEDIAN AD OF A .SHOW THAT AR (ABE) = AR (ACE) . (Q3) Q4. ABCD is a parallelogram, AE⊥DC and CF⊥AD.If AB =16 cm,AE= 8 cm and CF = 10 cm, find AD.

Q5. IF E, F, G AND H ARE RESPECTIVELY THE MID-POINTS OF THE SIDES OF A PARALLELOGRAM ABCD, SHOW THAT AR(EFGH) =AR(ABCD). Q6. XY IS A LINE PARALLEL TO SIDE BC OF A TRIANGLE ABC. IF BE || AC AND CF || AB (Q4) MEET XY AT E AND F RESPECTIVELY, SHOW THAT AR(ABE) = AR( ACF) Q7. IN FIG. PQRS AND ABRS ARE PARALLELOGRAMS AND X IS ANY POINT ON SIDE BR . SHOW THAT : (I) AREA (IIGM PQRS) =AREA (IIGM ABRS) (II) AREA ( AXS) = AREA (IIGM ABRS) (Q7) (III) AREA ( AXS) = AREA (IIGM PQRS) ITWARI COMMENTS THAT IF X IS THE MID POINT OF BR, THEN AREA ABX = AREA SXR. IS HE CORRECT ?. WHICH VALUE IS DEPICTED BY HIS COMMENTS ? Q8. SHOW THAT THE DIAGONALS OF A PARALLELOGRAM DIVIDE IT IN TO FOUR TRIANGLES OF EQUAL AREA. Q9. D , E AND F ARE RESPECTIVELY THE MID POINTS OF THE SIDES BC , CA AND AB OF A ∆ABC . SHOW THAT (i) BDEF IS A PARALLELOGRAM (ii) ar (DEF) = ar(ABC) (iii) ar (BDEF) = ar (ABC) . Q10. D AND E ARE POINTS ON SIDES AB AND AC RESPECTIVELY OF ∆ABC SUCH THAT ar (DBC) = ar (EBC) . PROVE THAT DE BC . Q11. ABCD IS A TRAPEZIUM WITH AB DC . A LINE PARALLEL TO AC INTERSECT AB AT X AND BC AT Y . PROVE THAT ar (ADX) = ar (ACY) . Q12. IN FIG. ABCDE IS A PENTAGON . A LINE THROUGH B PARALLEL TO AC MEETS DC PRODUCED AT F. SHOW THAT (i) ar (ACB) = ar (ACF) (ii) ar (AEDF) = ar (ABCDE) (Q12) Q13. THE SIDE AB OF A PARALLELOGRAM ABCD IS PRODUCED TO ANY POINT P. A LINE THROUGH A AND PARALLEL TO CP MEETS CB PRODUCED AT Q AND THEN PARALLELOGRAM PBQR IS COMPLETED (SEE THE FOLLOWING FIGURE). SHOW THAT AR (ABCD) = AR (PBQR). (Q13) Q14. IN THE FIGURE AP║BQ║ CR. PROVE THAT AR(AQC) = AR(PBR) . (Q14) प्र॰ 1 ननिमनिललिखखित वविषययों पर प्रनतविवेदनि ललिखखिए–

क॰ आपकवे वविदयद्यालियम विद्यावषर्षिककोतत्सवि मनिद्यायद्यागयद्या|

खि॰ वविदयद्यालियम विकद्यारकोपणव कद्या आयकोजनि ककयद्या गयद्या|

प्र॰ 2 पत्र ललिखखिए –

क॰ निगरपद्याललिकद्या कवे सविद्याससय अधधिकद्याररी कको कवेत्रककीत्सफद्याईहवेतत |

खि॰ लमत्र कको पत्र ललिखिकर शशीतकद्यालिरीनि अविकद्याश त्सद्याथ बबितद्यानिवेककीयकोजनिद्याबिनिद्याइयवे|

प्र॰ 3 ददयवे गए वविषययों पर ननिबिबंधि ललिखखिए–

क॰ इबंटरनिवेट कद्या जशीविनि पर प्रभद्यावि खि॰ त्समद्याचद्यार पत्रयोंकद्यामहततवि

प्र॰ 4 त्सभशी अलिबंकद्यारयों कवे दको – दको उदद्याहरणललिखखिए-

अनितप्रद्यात्स,शलिवेष,यमक,उपमद्या,रूपक,उतप्रवेकद्या,अनतशयकोककत,अनयकोककत

प्र॰ 5 ककनतज- गदयखिबंड –पद्याठ 1 त्सवे 5 तक

पदयखिबंड –पद्याठ 9 त्सवे14 तक कवे प्रशनिकोततर यद्याद कररए वि अभयद्यात्स ककीकजयवे | AUTUM BREAK ASSIGMENT 2016- 17 CLASS IX

1. Write an article on the topic;- a, Ban plastic bag “ SAVE ENVIOREMENT” b. “ SAVE EARTH SAVE LIFE “ c. Chaotic state of traffic in metropolitian cities. d. Safety and protection of girls in our country.

NOVEL.

1.Do melodius touch human heart ? What was the effect of two lovely black eyes on Harris and the writer?

2. Why did the narrator consult the medical dictionary in the British Museum.Describe his feeling after consulting the medical dictionary?

3. How can you say that the novel “THREE MEN IN A BOAT” is modern travelogue. प्र॰1 छकोटरी बिचचशी कको बिलियों कवे प्रनत प्रवेम? कययोंउमड़आयद्या प्र॰2 अपनिशी नतबबित यद्यात्रद्या कवे दरद्यानि लिवेखिक कको ककनि कदठनिद्याइययों? कद्यात्सद्यामनिद्याकरनिद्यापड़द्या प्र॰3 गद्याबंधिशी जशी निवे उपभकोकतद्याविद्यादरीवनत त्सबंसक कको हमद्यारवे तनितशीललिए च कययों कहद्या? ह प्र॰4 ककत्स घटनिद्या निवे त्सद्याललिम अलिरी कवे जशीविनि ककी ददशद्याम ककोबिदलिददयद्याऔरउनह पकशी प्रवेमशी बिनिद्या? ददयद्या प्र॰5 त्सर टद्यामत्स‘ हवे’ कवे मनिद्या पर दयद्या भद्यावि कवे? कयद्याकद्यारणथवे प्र॰6 मनितषय ईशविर कको कहद्या-कहद्याढतद्या ढ कफरतद्या? ह प्र॰7 बिबंद दविद्यार ककी त्सद्याकलि खिकोलिनिवे कवे ललिएतझद्यायद्या लिलिदयदनिवेकयद्याउपद्यायत्स ? ह प्र॰8 त्सखिशी निवे गकोपशीवषण त्सवेक कद्या कत्सद्या रूप धिद्यारण करनिवे कद्याआगहककयद्याह? प्र॰9 ककत्स शद्यात्सनितलिनिद्या ककीत तम कवे प्रभद्यावि त्सवे ककी? गईहऔरकययों प्र॰10 गद्यावि‘ ककोमरकत’ डडबबिवे त्सद्यातलिद्या खि कययों कहद्या? गयद्याह