निम्न के एकलकों के नाम तथा संरचना लिखिए|
(I) टेफ़लोन
(ii) टेरिलीन (मा. शिक्षा बोर्ड, मॉडल पेपर 2017-18)
(iii) नाइलोन -6,6 (मा. शिक्षा बोर्ड, मॉडल पेपर, 17-18)
(IV) बैकलाइट

Evaluate: (i) 5/6-7/8 , (ii) 5/12 -17/18 , (iii) 11/15 - 13/20 , (iv) -5/9 - (-2/3) , (v) 6/11 -(-3/4) , (vi) -2/3 -3/4

Which of the two rational numbers is greater in each of the following pairs? (i) 3/-7 or 1/7 , (ii) 11/(-18) or -5/18 , (iii) 7/10 or -9/10 (iv) 0 or -3/4 , (v) 1/12 or 0, (vi) 18/(-19) or 0 (vii) 7/8 or 11/16 , (viii) 11/-12 or -10/11 , (ix) -13/5 or -4 (x) 17/(-6) or -13/4 , (xi) 7/(-9) or -5/8 , (xii) -3/(-8) or 5/9

Arrange the following rational numbers in descending order : (i) 11/12, 13/18, 5/6, 7/9 , (ii) -11/20, 3/(-10), 17/(-30), -7/15 (iii) 9/(-24), -1, 2/(-3), -7/(-6) , (iv) 7/(-10), 11/15, -17/(-30), -2/5

Simplify: (i) 5/12 xx (-36) , (ii) -17/18 xx 12 , (iii) -5/6 xx 6/5 , (iv) -14 xx 9/28 , (v) -12/5 xx (-15) , (vi) -3/4 by 8/7 , (v) -16/9 by 12/-5 , (vi) 35/(-8) by 12/(-5) (vii) -3/10 by -40/9 , (viii) -32/5 by 15/(-16) , (ix) -8/15 by -25/32

Express the following sets in set-builder form : (i) (7/8, 8/9, 9/10, 10/11, 11/12) , (ii) {0,3,56,9,12,15,18} (iii) {1/3, 1/9, 1/17, 1/81, 1/243} (iv) [x: x^(2) -6x-7=0]

Find the multiple inverse or reciprocal of each of the following : (i) 18 (ii) -16 (iii) (13)/(25) (iv) (-17)/(12) (v) (-6)/(19) (vi) (-3)/(-5) (vii) -1 (viii) 0

Write a statement of the equation, given below: (i) x-7=14 (ii) 2y=18 (iii) 11+3x=17 (iv) 2x-3=13 (v) 12y-30=6 (vi) (2z)/(3)=8