Define catalyst and enzyme. Describe two differences between homogeneous and heterogeneous catalysis, giving examples for each
Explain the concept of entropy. Calculate the change in entropy when 2 moles of an ideal gas expand isothermally and reversibly from a volume of 5 liters to 15 liters at 300 K.
Identify the functional groups in the following compounds and provide their IUPAC names: (i) CH3CH2OH (ii) CH3COCH3 (iii) CH3COOH.
The value of 5 ÷ (–1) does not lie between
(a) 0 and – 10 (b) 0 and 10 (c) – 4 and – 15 (d) – 6 and 6
On the number line, the value of (–3) × 3 lies on right hand side of
(a) – 10 (b) – 4 (c) 0 (d) 9
Which of the following statements is not true?
(a) When two positive integers are added, we always get a positive integer.
(b) When two negative integers are added we always get a negative integer.
(c) When a positive integer and a negative integer is added we always get a negative integer.
(d) Additive inverse of an integer 2 is (– 2) and additive inverse of ( – 2) is 2.
Next three consecutive numbers in the pattern 11, 8, 5, 2, –, –, –are
(a) 0, – 3, – 6 (b) – 1, – 5, – 8 (c) – 2, – 5, – 8 (d) – 1, – 4, – 7
Three point charges, each of +2 μC, are placed at the vertices of an equilateral triangle with sides of length 0.3 meters. Calculate the total electrostatic potential energy of the system.
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