3136: Permanent hardness of water cannot be removed by:
(a) Boiling
(b) Adding caustic soda
(c) Distillation
(d) Adding soda
3137: Uplift of the backward classes was the main programme of the
(a) Prathana Samaj
(b) Satyashodhak Samaj
(c) Arya Samaj
(d) Ramakrishna Mission
3138: A spherical body moves with a uniform angular velocity around a circular path of radius r. Which one of the following statements is correct?
(a) The body has no acceleration
(b) The body has a radial acceleration 2r directed towards the centre of the path.
(c) The body has a radial acceleration 2/5 2r directed away from the centre of the path.
(d) The body has an acceleration 2r tangential to its path
3139: Consider the following statements :
Industrial development in India, to an extent, is constrained by
I. lack of adequate entrepreneurship and leadership in business.
II. lack of savings to invest.
III. lack of technology, skills and infrastructure.
IV. limited purchasing power among the larger masses.
Which of the above statements are correct ?
(a) I, II and III
(b) I, III and IV
(c) II, III and IV
(d) I, II and IV
3140: Banjaras during the medieval period of Indian history were generally
(a) agriculturists
(b) warriors
(c) weavers
(d) traders