{
  "title": "Cartesian Plane - Grade 9 CBSE",
  "total_questions": 100,
  "questions": [
    {"id": 1, "difficulty": "easy", "question": "What are the coordinates of origin?", "options": {"A": "(1,1)", "B": "(0,0)", "C": "(0,1)", "D": "(1,0)"}, "correct_answer": "B"},
    {"id": 2, "difficulty": "easy", "question": "In which quadrant is point (-3,4)?", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "B"},
    {"id": 3, "difficulty": "easy", "question": "What is x-coordinate called?", "options": {"A": "Ordinate", "B": "Abscissa", "C": "Origin", "D": "Quadrant"}, "correct_answer": "B"},
    {"id": 4, "difficulty": "easy", "question": "Point (0,5) lies on:", "options": {"A": "x-axis", "B": "y-axis", "C": "Origin", "D": "Quadrant I"}, "correct_answer": "B"},
    {"id": 5, "difficulty": "easy", "question": "What are coordinates of point on x-axis?", "options": {"A": "(0,y)", "B": "(x,0)", "C": "(x,y)", "D": "(0,0)"}, "correct_answer": "B"},
    {"id": 6, "difficulty": "easy", "question": "In quadrant III, signs of (x,y) are:", "options": {"A": "(+,+)", "B": "(+,-)", "C": "(-,+)", "D": "(-,-)"}, "correct_answer": "D"},
    {"id": 7, "difficulty": "easy", "question": "Point (4,-2) is in quadrant:", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "D"},
    {"id": 8, "difficulty": "easy", "question": "What is y-coordinate called?", "options": {"A": "Abscissa", "B": "Ordinate", "C": "Origin", "D": "Axis"}, "correct_answer": "B"},
    {"id": 9, "difficulty": "easy", "question": "Point (-2,-3) lies in quadrant:", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "C"},
    {"id": 10, "difficulty": "easy", "question": "Horizontal line in Cartesian plane is:", "options": {"A": "x-axis", "B": "y-axis", "C": "Origin", "D": "Diagonal"}, "correct_answer": "A"},
    {"id": 11, "difficulty": "easy", "question": "How many quadrants are in Cartesian plane?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "C"},
    {"id": 12, "difficulty": "easy", "question": "Point (5,0) lies on:", "options": {"A": "x-axis", "B": "y-axis", "C": "Quadrant I", "D": "Quadrant IV"}, "correct_answer": "A"},
    {"id": 13, "difficulty": "easy", "question": "Signs in quadrant II are:", "options": {"A": "(+,+)", "B": "(-,+)", "C": "(-,-)", "D": "(+,-)"}, "correct_answer": "B"},
    {"id": 14, "difficulty": "easy", "question": "Vertical line through origin is:", "options": {"A": "x-axis", "B": "y-axis", "C": "Line y=x", "D": "Line y=-x"}, "correct_answer": "B"},
    {"id": 15, "difficulty": "easy", "question": "Point where axes intersect is called:", "options": {"A": "Vertex", "B": "Origin", "C": "Intersection", "D": "Center"}, "correct_answer": "B"},
    {"id": 16, "difficulty": "easy", "question": "In quadrant IV, x is ____, y is ____.", "options": {"A": "positive, positive", "B": "negative, positive", "C": "positive, negative", "D": "negative, negative"}, "correct_answer": "C"},
    {"id": 17, "difficulty": "easy", "question": "Coordinates of point 3 units right of origin on x-axis:", "options": {"A": "(0,3)", "B": "(3,0)", "C": "(3,3)", "D": "(-3,0)"}, "correct_answer": "B"},
    {"id": 18, "difficulty": "easy", "question": "Point symmetric to (2,3) about y-axis is:", "options": {"A": "(2,-3)", "B": "(-2,3)", "C": "(-2,-3)", "D": "(3,2)"}, "correct_answer": "B"},
    {"id": 19, "difficulty": "easy", "question": "All points on x-axis have y-coordinate:", "options": {"A": "1", "B": "0", "C": "-1", "D": "Variable"}, "correct_answer": "B"},
    {"id": 20, "difficulty": "easy", "question": "Quadrant where both coordinates positive:", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "A"},
    
    {"id": 21, "difficulty": "medium", "question": "Find quadrant of point where x<0, y>0.", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "B"},
    {"id": 22, "difficulty": "medium", "question": "Point (-4,-5) lies in quadrant:", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "C"},
    {"id": 23, "difficulty": "medium", "question": "If point lies on both axes, it must be:", "options": {"A": "(1,1)", "B": "(0,0)", "C": "(0,1)", "D": "(1,0)"}, "correct_answer": "B"},
    {"id": 24, "difficulty": "medium", "question": "Mirror image of (3,4) about x-axis:", "options": {"A": "(-3,4)", "B": "(3,-4)", "C": "(-3,-4)", "D": "(4,3)"}, "correct_answer": "B"},
    {"id": 25, "difficulty": "medium", "question": "Point on y-axis with y-coordinate -6:", "options": {"A": "(0,-6)", "B": "(-6,0)", "C": "(6,0)", "D": "(0,6)"}, "correct_answer": "A"},
    {"id": 26, "difficulty": "medium", "question": "If abscissa is 0, point lies on:", "options": {"A": "x-axis", "B": "y-axis", "C": "Origin", "D": "Quadrant I"}, "correct_answer": "B"},
    {"id": 27, "difficulty": "medium", "question": "Point symmetric to (-2,5) about origin:", "options": {"A": "(2,5)", "B": "(2,-5)", "C": "(-2,-5)", "D": "(-5,2)"}, "correct_answer": "B"},
    {"id": 28, "difficulty": "medium", "question": "Which point lies in quadrant IV?", "options": {"A": "(2,3)", "B": "(-2,3)", "C": "(-2,-3)", "D": "(2,-3)"}, "correct_answer": "D"},
    {"id": 29, "difficulty": "medium", "question": "If ordinate is 0, point lies on:", "options": {"A": "x-axis", "B": "y-axis", "C": "Origin", "D": "Line y=x"}, "correct_answer": "A"},
    {"id": 30, "difficulty": "medium", "question": "Point (0,-7) is on:", "options": {"A": "Positive x-axis", "B": "Negative x-axis", "C": "Positive y-axis", "D": "Negative y-axis"}, "correct_answer": "D"},
    {"id": 31, "difficulty": "medium", "question": "Quadrant where x>0, y<0:", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "D"},
    {"id": 32, "difficulty": "medium", "question": "Reflection of (a,b) in y-axis is:", "options": {"A": "(a,-b)", "B": "(-a,b)", "C": "(-a,-b)", "D": "(b,a)"}, "correct_answer": "B"},
    {"id": 33, "difficulty": "medium", "question": "Point on negative x-axis:", "options": {"A": "(0,-3)", "B": "(-3,0)", "C": "(3,0)", "D": "(0,3)"}, "correct_answer": "B"},
    {"id": 34, "difficulty": "medium", "question": "If point is in quadrant II, then:", "options": {"A": "x>0, y>0", "B": "x<0, y>0", "C": "x<0, y<0", "D": "x>0, y<0"}, "correct_answer": "B"},
    {"id": 35, "difficulty": "medium", "question": "Point equidistant from axes in quadrant I:", "options": {"A": "(2,3)", "B": "(3,2)", "C": "(4,4)", "D": "(5,0)"}, "correct_answer": "C"},
    {"id": 36, "difficulty": "medium", "question": "Which axis does point (0,8) lie on?", "options": {"A": "x-axis", "B": "y-axis", "C": "Both", "D": "Neither"}, "correct_answer": "B"},
    {"id": 37, "difficulty": "medium", "question": "Point (-5,0) is on:", "options": {"A": "Positive x-axis", "B": "Negative x-axis", "C": "Positive y-axis", "D": "Negative y-axis"}, "correct_answer": "B"},
    {"id": 38, "difficulty": "medium", "question": "If a point has equal coordinates, it lies on:", "options": {"A": "x-axis", "B": "y-axis", "C": "Line y=x", "D": "Line y=-x"}, "correct_answer": "C"},
    {"id": 39, "difficulty": "medium", "question": "Point symmetric to (4,-3) about x-axis:", "options": {"A": "(-4,-3)", "B": "(4,3)", "C": "(-4,3)", "D": "(3,4)"}, "correct_answer": "B"},
    {"id": 40, "difficulty": "medium", "question": "Quadrant where both coordinates negative:", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "C"},
    {"id": 41, "difficulty": "medium", "question": "Point on line y=-x in quadrant II:", "options": {"A": "(2,2)", "B": "(-2,2)", "C": "(2,-2)", "D": "(-2,-2)"}, "correct_answer": "B"},
    {"id": 42, "difficulty": "medium", "question": "If point lies on positive y-axis, coordinates are:", "options": {"A": "(0,y) with y>0", "B": "(x,0) with x>0", "C": "(0,y) with y<0", "D": "(x,0) with x<0"}, "correct_answer": "A"},
    {"id": 43, "difficulty": "medium", "question": "Point (a,-a) where a>0 lies in quadrant:", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "D"},
    {"id": 44, "difficulty": "medium", "question": "Reflection of point in origin changes signs:", "options": {"A": "Both change", "B": "Only x changes", "C": "Only y changes", "D": "Neither changes"}, "correct_answer": "A"},
    {"id": 45, "difficulty": "medium", "question": "Point on negative y-axis:", "options": {"A": "(0,-4)", "B": "(-4,0)", "C": "(4,0)", "D": "(0,4)"}, "correct_answer": "A"},
    {"id": 46, "difficulty": "medium", "question": "If abscissa = ordinate and both positive, quadrant:", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "A"},
    {"id": 47, "difficulty": "medium", "question": "Point symmetric to (-3,-4) about y-axis:", "options": {"A": "(3,-4)", "B": "(-3,4)", "C": "(3,4)", "D": "(-4,-3)"}, "correct_answer": "A"},
    {"id": 48, "difficulty": "medium", "question": "Which point is not on an axis?", "options": {"A": "(0,5)", "B": "(6,0)", "C": "(0,0)", "D": "(2,3)"}, "correct_answer": "D"},
    {"id": 49, "difficulty": "medium", "question": "If x-coordinate is negative, y-coordinate zero, point on:", "options": {"A": "Positive x-axis", "B": "Negative x-axis", "C": "Positive y-axis", "D": "Negative y-axis"}, "correct_answer": "B"},
    {"id": 50, "difficulty": "medium", "question": "Point on line through origin with slope 1:", "options": {"A": "(2,3)", "B": "(3,2)", "C": "(4,4)", "D": "(5,-5)"}, "correct_answer": "C"},
    {"id": 51, "difficulty": "medium", "question": "Quadrant for point with x<0, y<0:", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "C"},
    {"id": 52, "difficulty": "medium", "question": "Point (0,0) is intersection of:", "options": {"A": "x-axis and y-axis", "B": "Two quadrants", "C": "Positive axes", "D": "All quadrants"}, "correct_answer": "A"},
    {"id": 53, "difficulty": "medium", "question": "If point is in quadrant I, then:", "options": {"A": "x>0, y>0", "B": "x<0, y>0", "C": "x<0, y<0", "D": "x>0, y<0"}, "correct_answer": "A"},
    {"id": 54, "difficulty": "medium", "question": "Mirror image of (a,b) in origin:", "options": {"A": "(a,-b)", "B": "(-a,b)", "C": "(-a,-b)", "D": "(b,a)"}, "correct_answer": "C"},
    {"id": 55, "difficulty": "medium", "question": "Point on positive x-axis:", "options": {"A": "(0,7)", "B": "(7,0)", "C": "(-7,0)", "D": "(0,-7)"}, "correct_answer": "B"},
    {"id": 56, "difficulty": "medium", "question": "If abscissa = -ordinate, point lies on:", "options": {"A": "y=x", "B": "y=-x", "C": "x-axis", "D": "y-axis"}, "correct_answer": "B"},
    {"id": 57, "difficulty": "medium", "question": "Quadrant for point where x>0, y>0:", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "A"},
    {"id": 58, "difficulty": "medium", "question": "Point symmetric to (5,-2) about origin:", "options": {"A": "(-5,2)", "B": "(-5,-2)", "C": "(5,2)", "D": "(2,5)"}, "correct_answer": "A"},
    {"id": 59, "difficulty": "medium", "question": "On which axis does (-3,0) lie?", "options": {"A": "Positive x-axis", "B": "Negative x-axis", "C": "Positive y-axis", "D": "Negative y-axis"}, "correct_answer": "B"},
    {"id": 60, "difficulty": "medium", "question": "Point where x-coordinate is 0:", "options": {"A": "On x-axis", "B": "On y-axis", "C": "At origin", "D": "In quadrant I"}, "correct_answer": "B"},
    {"id": 61, "difficulty": "medium", "question": "If point lies in quadrant IV, signs:", "options": {"A": "(+,+)", "B": "(-,+)", "C": "(-,-)", "D": "(+,-)"}, "correct_answer": "D"},
    {"id": 62, "difficulty": "medium", "question": "Reflection of (2,5) in x-axis:", "options": {"A": "(-2,5)", "B": "(2,-5)", "C": "(-2,-5)", "D": "(5,2)"}, "correct_answer": "B"},
    {"id": 63, "difficulty": "medium", "question": "Point on both axes:", "options": {"A": "(1,1)", "B": "(0,1)", "C": "(1,0)", "D": "(0,0)"}, "correct_answer": "D"},
    {"id": 64, "difficulty": "medium", "question": "Quadrant where x<0, y>0:", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "B"},
    {"id": 65, "difficulty": "medium", "question": "Point (4,0) is on:", "options": {"A": "Positive x-axis", "B": "Negative x-axis", "C": "Positive y-axis", "D": "Negative y-axis"}, "correct_answer": "A"},
    {"id": 66, "difficulty": "medium", "question": "If ordinate is negative, abscissa zero, point on:", "options": {"A": "Positive x-axis", "B": "Negative x-axis", "C": "Positive y-axis", "D": "Negative y-axis"}, "correct_answer": "D"},
    {"id": 67, "difficulty": "medium", "question": "Point on line y=x in quadrant III:", "options": {"A": "(3,3)", "B": "(-3,3)", "C": "(3,-3)", "D": "(-3,-3)"}, "correct_answer": "D"},
    {"id": 68, "difficulty": "medium", "question": "Quadrant for (-2,3):", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "B"},
    {"id": 69, "difficulty": "medium", "question": "Point symmetric to (-4,5) about x-axis:", "options": {"A": "(4,5)", "B": "(-4,-5)", "C": "(4,-5)", "D": "(-5,4)"}, "correct_answer": "B"},
    {"id": 70, "difficulty": "medium", "question": "If point lies on negative x-axis, coordinates:", "options": {"A": "(0,y) y<0", "B": "(x,0) x<0", "C": "(0,y) y>0", "D": "(x,0) x>0"}, "correct_answer": "B"},
    {"id": 71, "difficulty": "medium", "question": "Point (a,a) where a<0 lies in quadrant:", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "C"},
    {"id": 72, "difficulty": "medium", "question": "Reflection in y-axis changes:", "options": {"A": "Sign of x", "B": "Sign of y", "C": "Both signs", "D": "No change"}, "correct_answer": "A"},
    {"id": 73, "difficulty": "medium", "question": "Point on positive y-axis:", "options": {"A": "(0,5)", "B": "(5,0)", "C": "(0,-5)", "D": "(-5,0)"}, "correct_answer": "A"},
   {
  "id": 74,
  "difficulty": "medium",
  "question": "If abscissa = -ordinate, both nonzero, quadrant:",
  "options": {
    "A": "I or III",
    "B": "II or IV",
    "C": "I or II",
    "D": "III or IV"
  },
  "correct_answer": "B"
},    {"id": 75, "difficulty": "medium", "question": "Point symmetric to (3,-2) about y-axis:", "options": {"A": "(-3,-2)", "B": "(3,2)", "C": "(-3,2)", "D": "(2,3)"}, "correct_answer": "A"},
    {"id": 76, "difficulty": "medium", "question": "Which point is on y-axis?", "options": {"A": "(2,0)", "B": "(0,3)", "C": "(4,4)", "D": "(-1,-1)"}, "correct_answer": "B"},
    {"id": 77, "difficulty": "medium", "question": "If x-coordinate positive, y-coordinate zero, point on:", "options": {"A": "Positive x-axis", "B": "Negative x-axis", "C": "Positive y-axis", "D": "Negative y-axis"}, "correct_answer": "A"},
    {"id": 78, "difficulty": "medium", "question": "Point on line through origin with slope -1:", "options": {"A": "(2,2)", "B": "(-2,2)", "C": "(2,-2)", "D": "(-2,-2)"}, "correct_answer": "B"},
    {"id": 79, "difficulty": "medium", "question": "Quadrant for point with x>0, y<0:", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "D"},
    {"id": 80, "difficulty": "medium", "question": "Point (0,0) belongs to:", "options": {"A": "Quadrant I", "B": "All quadrants", "C": "No quadrant", "D": "Quadrant IV"}, "correct_answer": "C"},

    {"id": 81, "difficulty": "hard", "question": "If point P(a,b) lies in quadrant II, then point Q(b,a) lies in quadrant:", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "D"},
    {"id": 82, "difficulty": "hard", "question": "Find condition for point to lie on line bisecting quadrants I and III.", "options": {"A": "x=y", "B": "x=-y", "C": "x=0", "D": "y=0"}, "correct_answer": "A"},
    {"id": 83, "difficulty": "hard", "question": "Point R is reflection of P(3,4) in x-axis, then reflection of R in y-axis. Coordinates:", "options": {"A": "(3,4)", "B": "(-3,4)", "C": "(3,-4)", "D": "(-3,-4)"}, "correct_answer": "D"},
    {"id": 84, "difficulty": "hard", "question": "If point lies on line through origin making 45° with positive x-axis, then:", "options": {"A": "x=y", "B": "x=-y", "C": "x=0", "D": "y=0"}, "correct_answer": "A"},
    {"id": 85, "difficulty": "hard", "question": "Point symmetric to (a,b) about line y=x is:", "options": {"A": "(a,-b)", "B": "(-a,b)", "C": "(b,a)", "D": "(-b,-a)"}, "correct_answer": "C"},
    {"id": 86, "difficulty": "hard", "question": "Find quadrant of point (|x|,-|y|) if x≠0, y≠0.", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "D"},
    {"id": 87, "difficulty": "hard", "question": "If point P(k,2k) lies in quadrant III, then k is:", "options": {"A": "Positive", "B": "Negative", "C": "Zero", "D": "Any real"}, "correct_answer": "B"},
    {"id": 88, "difficulty": "hard", "question": "Point obtained by rotating (3,4) 180° about origin:", "options": {"A": "(4,3)", "B": "(-3,4)", "C": "(3,-4)", "D": "(-3,-4)"}, "correct_answer": "D"},
    {"id": 89, "difficulty": "hard", "question": "If abscissa and ordinate have same sign, point lies in:", "options": {"A": "I or II", "B": "I or III", "C": "II or IV", "D": "III or IV"}, "correct_answer": "B"},
    {"id": 90, "difficulty": "hard", "question": "Point on line making equal intercepts on axes in quadrant II:", "options": {"A": "(3,3)", "B": "(-3,3)", "C": "(3,-3)", "D": "(-3,-3)"}, "correct_answer": "B"},
    {"id": 91, "difficulty": "hard", "question": "If point (a²,a) lies in quadrant II, then a is:", "options": {"A": "Positive", "B": "Negative", "C": "Zero", "D": "Imaginary"}, "correct_answer": "B"},
    {"id": 92, "difficulty": "hard", "question": "Find condition for point to be equidistant from axes in quadrant I.", "options": {"A": "x=y>0", "B": "x=-y", "C": "x=0", "D": "y=0"}, "correct_answer": "A"},
    {"id": 93, "difficulty": "hard", "question": "Point obtained by reflecting (p,q) successively in x-axis, y-axis, origin:", "options": {"A": "(p,q)", "B": "(-p,-q)", "C": "(p,-q)", "D": "(-p,q)"}, "correct_answer": "A"},
    {"id": 94, "difficulty": "hard", "question": "If point lies on line bisecting quadrants II and IV, then:", "options": {"A": "x=y", "B": "x+y=0", "C": "x=0", "D": "y=0"}, "correct_answer": "B"},
    {"id": 95, "difficulty": "hard", "question": "Quadrant of point (sinθ, cosθ) for θ in (90°,180°):", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "B"},
    {"id": 96, "difficulty": "hard", "question": "Point symmetric to (a,b) about point (0,0) is same as rotation by:", "options": {"A": "90°", "B": "180°", "C": "270°", "D": "360°"}, "correct_answer": "B"},
    {"id": 97, "difficulty": "hard", "question": "If x-coordinate is square of y-coordinate and both negative, quadrant:", "options": {"A": "I", "B": "II", "C": "III", "D": "IV"}, "correct_answer": "C"},
    {"id": 98, "difficulty": "hard", "question": "Point obtained by rotating (x,y) 90° clockwise about origin:", "options": {"A": "(y,-x)", "B": "(-y,x)", "C": "(-x,-y)", "D": "(y,x)"}, "correct_answer": "A"},
    {"id": 99, "difficulty": "hard", "question": "Condition for point to lie in interior of first quadrant:", "options": {"A": "x>0, y>0", "B": "x≥0, y≥0", "C": "x<0, y>0", "D": "x>0, y<0"}, "correct_answer": "A"},
    {"id": 100, "difficulty": "hard", "question": "If point (|a|,|b|) lies in quadrant I, then point (a,b) can lie in:", "options": {"A": "Any quadrant", "B": "Quadrant I only", "C": "Quadrants I or III", "D": "All except origin"}, "correct_answer": "D"}
  ]
}