Dr. Lal and Jain Solutions for Exercise 1: Exercise 1
Dr. Lal and Jain English, Quantitative Aptitude, English, Computer Knowledge Solutions for Exercise - Dr. Lal and Jain Solutions for Exercise 1: Exercise 1
Attempt the free practice questions from Exercise 1: Exercise 1 with hints and solutions to strengthen your understanding. Railway Recruitment Board Computer Based Test solutions are prepared by Experienced Embibe Experts.
Questions from Dr. Lal and Jain Solutions for Exercise 1: Exercise 1 with Hints & Solutions
Which of the following pairs is not correctly matched?
| Mineral | Industrial use |
| (A) Zircon | Nuclear reactors |
| (B) Manganese ore | Dry battery |
| (C) Mica |
Bleaching powder |
| (D) Bauxite | Tanning |
The average salinity of sea water is-
(A) 20%
(B) 25%
(C) 30%
(D) 35%
The chemical (Ethyl Mercaptan) added to the odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of:
(A) Sulphur
(B) Fluorine
(C) Chlorine
(D) Bromine
The inert gas which is substituted for nitrogen in the air, used by deep sea divers for breathing is--
(A) Helium
(B) Argon
(C) Krypton
(D) Xenon
The group of metals Fe, Co, Ni may be best called as:
(A) Alkaline metals
(B) Rare metals
(C) Main group metals
(D) Transition metals
Amalgams are--
(A) Alloys which contain carbon
(B) Alloys which have great resistance to abrasion
(C) Alloys which contain mercury as one of the contents
(D) Highly coloured alloys
GPS contains of--
(A) 20 satellites
(B) 32 satellites
(C) 7 satellites
(D) 40 satellites
The property of a substance to absorb moisture from the air on exposure is called--
(A) Osmosis
(B) Dessication
(C) Efflorescence
(D) Deliquescence
