2856: Consider the following statements :
Glass can be etched or scratched by
I. diamond.
II. hydrofluoric acid.
III. aquaregia.
IV. cone, sulphuric acid.
Which of these statements are correct ?
(a) I and IV
(b) II and III
(c) I and II
(d) II and IV
2857: In a carrom board game competition, m boys and n girls(m > n > 1) of a school participate in which every student has to play exactly one game with every other student. Out of the total games played; it was found that in 221 games one player was a boy and the other player was a girl.
Consider the following statements:
1. The total number of students that participated in the competition is 30.
2. The number of games in which both players were girls is 78.
Which of the statements given above is/are correct?
(A) 1 only
(B) 2 only
(C) Both 1 and 2
(D) Neither 1 nor 2
2858: Which of the following are the main causes of slow rate of growth of per capital income In India?
I. High capital-output ratio
II. High rate of growth of population
III. High rate of capital formation
IV. High level of fiscal deficits
Select the correct answer from the codes given below:
Codes:
(a) I, II, III and lV
(b) II, III and IV
(c) I and IV
(d) I and II
2859: Among the following, who was not a proponent of bhakti cult ?
(a) Tukaram
(b) Tyagaraja
(c) Vallabhacharya
(d) Nagarjuna
2860: Water is a good solvent of ionic salts because
(a) it has a high boiling point
(b) it has a high dipole moment
(c) it has a high specific heat
(d) it has no colour