Question
AB is parallel to DC in a trapezium ABCD. It is given
that AB > DC and the diagonals AC and BD intersect at O. If AO = 3x - 15 OB = x + 9, OC = x - 5 and OD = 5, and x has two values x1 and x2 then the value of ( x12Â + x22) is:Solution
ATQ, 
⇒ (3x - 15) × 5 = (x + 9) × (x - 5) ⇒ 15x - 75 = x2 + 9x - 5x - 45 ⇒ 15x - 75 = x2 + 4x - 45 ⇒ x2 - 11x + 30 = 0 Solving the quadratic equation: 
⇒ x1 = 6, x2 = 5 To find x12 + x22: ⇒ 62 + 52 = 36 + 25 = 61
Most enzymes are active in pH range
a)Â Â Â 3.5-9.5
b)Â Â Â 4.5-8
c)Â Â Â 4-7
d)Â Â Â 3.5-6
Which food preservative inhibit fungal growth and non-enzymatic browning in fruit juice
Which is not correct about pasteurization?
Inhibition or slowing of growth of microorganisms can be achieved by:
Options :
1. Freezing
2. Vacuum drying
3. Preservatives
4. Fermentation
 Moulds can thrive best in closed, damp & dark situations. Which of the following conditions suits decent for the growth of moulds?
a.   ...
Which is biotechnological milestone?
Which protein is responsible for elasticity of wheat dough?
Which of these are glass container closure types?
Options:
1. Lug caps
2. Roll on caps
3. Continuous thread closures
4. T-top closures
Caramels are firm ______ candies and the added substance that may interfere with crystallisation are________
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