(Download) Special Class Railway Apprentices (SCRA) Practice Paper (SET - 1) : Physical Science

Match list-I with list-II and select the correct answer using the codes given below the lists:
List-I - List-II
(Chemical)
A. Washing soda
B. Lime stone
C. Red lead
D. White lead

(Formulae)
1. Pb(OH)2. 2PbCO3
2. Pb3O4
3. Na2CO3.10H2O
4. CaCO3

Codes:
    A B C D
(a) 1 2 3 4
(b) 3 4 2 1
(c) 4 3 2 1
(d) 4 3 1 2

Which of the following statements are true regarding graphite ?
1. It is the crystalline allotrope of carbon.
2. C—C bond distance is greater than diamond.
3. The hybridisation of carbon in graphite is sp3.
4. Graphite is the good conductor of heat and electricity.

Which of these statements are correct?
(a) 1 and 2 (b) 3 and 4
(c) 1 and 4 (d) 2 and 4

Heavy water is a compound of :
(a) hydrogen and heavier isotope of oxygen
(b) heavier isotopes of hydrogen and oxygen
(c) oxygen and heavier isotope of hydrogen
(d) none of the above

Which general was responsible for Jallianwala Bagh tragedy ?
(a) General Dalhousie
(b) General Dyer
(c) General Mountbatten
(d) General William Bentinck

Which is the southrnmost place in the Indian union ?
(a) Kanyakumari (b) Rameshwaram
(c) Indira Point (d) Vivekanand

Who is legally competent under the Indian Constitution to declare war or conclude peace ?
(a) Prime Minister
(b) The President
(c) The Parliament
(d) The Council of Ministers

Which of the following statements is not correct about the haloalkanes ?
(a) They are derived from alkenes by replacement of one of its hydrogen atoms by halogens.
(b) They can be prepared by the addition of hydrogen halides to alkenes.
(c) They undergo nucleophilic substitution reactions in which the halogen atom is replaced by another atom or group.
(d) They can be reduced with lithium aluminium hydride to give the corresponding alkanes.