21: Of the four forms of political protests mentioned below, which one is derived from the name of the person who used it as a political weapon for the first time ?
(a) Boycott
(b) Gherao
(c) Bandh
(d) Hartal
22: With reference to the usefulness of the by-products of sugar industry, which of the following statements is/are correct?
1. Bagasse can be used as biomass fuel for the generation of energy.
2. Molasses can be used as one of the feed stocks for the production of synthetic chemical fertilizers.
3. Molasses can be used for the production of ethanol.
Select the correct answer using the codes given below.
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
23: A class starts after lunch at 1 p.m. and lasts till 3.52 p.m. Four periods are over during this interval. After every period, 4 minutes are allowed for going from one classroom to another. What is the exact duration of each period held?
(a) 42 minutes
(b) 41 minutes
(c) 40 minutes
(d) 39 minutes
24: Consider the following statements about Madam Bhikaji Cama :
1. Madam Cama unfurled the National Flag at the international Socialist Conference in Paris in the year 1907.
2. Madam Cama served as private secretary to Dadabhai Naoroji.
3. Madam Cama was born to Parsi parents.
Which of the statements given above is/are correct?
(a) 1 and 2, only
(b) 2 and 3, only
(c) 3 only
(d) 1, 2 and 3
25: Among the following organisms, which one does not belong to the class of other three ?
(a) Crab
(b) Mite
(c) Scorpion
(d) Spider