Differential Equations

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Question

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Question 1 :

If x = y log (xy), then dy/dx is:

1. (x - y)/x (1 + log xy)
2. (x - y)/y (1 + log xy)
3. (x - y)/(1 + log xy)
4. None of these
Answer
6941

Question 2 :

CO + NaOH ?

1. HCOONa
2. C₂H₂O₄
3. HCOOH
4. CH₃COOH
Answer
6942

Question 3 :

Which of the following compounds is known as oil of winter green ?

1. Phenyl benzoate
2. Phenyl salicylate
3. Phenyl acetate
4. Methyl salicylate
Answer
6943

Question 4 :

The value of y₂ (1), when x³ - 2x² y² + 5x +y - 5 = 0 and y(1) = 1 , is given by

1. (23/27)
2. -(183/23)
3. 8
4. -(238/27)
Answer
6944

Question 5 :

Which of the following is optically active ?

1. Ethylene glycol
2. Oxalic acid
3. Glycerol
4. Tartaric acid
Answer
6945