1456: Assertion (A) :
Activated charcoal is used for decolourising sugar solution.
Reason (R) :
Activated charcoal absorbs the impurities on its surface.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
1457: Consider the following statements about acetylene :
I. It is used in welding industry.
II. It is raw material for preparing plastics.
III. It is easily obtained by mixing silicon carbide and water.
Of these statements :
(a) I and II are correct
(b) I and III are correct
(c) II and III are correct
(d) I, II and III are correct
1458: In a question paper, there are four multiple choice questions. Each question has five choices with only one choice for its correct answer. What is the total number of ways in which a candidate will not get all the four answers correct?
(A) 19
(B) 120
(C) 1024
(D) 624
1459: Which of the following pairs of substances can be completely separated by sublimation ?
(a) Sand and iodine
(b) Ammonium chloride and iodine
(c) Sand and sulphur
(d) Salt and sulphur
1460: The members of the Constituent Assembly which drafted the Constitution of India were
(a) nominated by the British Parliament
(b) nominated by the Governor General
(c) elected by the Legislative Assemblies of various provinces
(d) elected by the Indian National Congress and Muslim League