RRB JE GK Questions 2026

Carbon is a non-metal, so it does not show metallic character; it neither loses electrons to form positive ions nor shows the lustre and malleability of metals.

An ionic compound is a lattice of positive and negative ions held by strong electrostatic attraction, and that force explains all its other properties.

Ionic compounds dissolve well in water but not in kerosene, petrol or other non-polar organic solvents, so this statement is not a property of theirs.

The element with atomic number 56 is barium, and its outermost electron enters the 6s orbital, so it sits in the s-block.

Relative atomic mass is measured against the carbon-12 atom, one-twelfth of whose mass is taken as the standard unit. That unit is the atomic mass unit, written u, and it is defined as exactly one-twelfth of the mass of one atom of carbon-12.

The balanced equation is 2FeSO4 → Fe2O3 + SO2 + SO3, so p = 2, q = 1, r = 1 and s = 1.

Three grams of hydrogen, 48 grams of oxygen and 42 grams of nitrogen each come to 1.5 moles, while two grams of carbon is only about 0.17 mole, so carbon holds a different number of particles.

A simple pendulum about one metre long completes one full swing in roughly two seconds, and a pendulum of this length is called the seconds pendulum.

Mass by mass percentage of a solution is the mass of the solute divided by the mass of the whole solution, multiplied by 100.

The heat produced by a current is given by Joule's law of heating, H equals I squared into R into t. Here the current is 0.3 A, the resistance is 418 ohms and the time is 1 minute, which is 60 seconds.

Ammonium chloride is the salt of a strong acid, hydrochloric acid, and a weak base, ammonium hydroxide, so its aqueous solution is acidic and its pH is less than 7.

The object stands between the pole and the focus of the concave mirror, so the image formed is virtual, erect and enlarged, and the magnification is positive.

The Chenab Bridge, built on the Udhampur to Srinagar to Baramulla rail link, rises about 359 metres above the bed of the Chenab and is the highest railway arch bridge in the world, its single steel arch spanning the gorge.

The Railway Board was constituted in 1905 to supervise the many private railway companies then operating in India, and it continues as the apex body of the Ministry of Railways.

Chittaranjan Locomotive Works in West Bengal is the locomotive plant of Indian Railways and builds electric locomotives; it began with steam locomotives and turned to electric traction.

Broad gauge in India measures 1,676 millimetres between the inner faces of the rails, and it carries almost all long distance traffic; the conversion of older lines to this gauge is called Project Unigauge.

The correct answer is C, the Darjeeling Himalayan Railway, inscribed in 1999 as the first of the three lines that together form the World Heritage property called the Mountain Railways of India.

The Vivek Express runs between Dibrugarh in upper Assam and Kanniyakumari at the southern tip of the mainland, covering roughly 4,200 kilometres, the longest route of any train in the country.

The South Central Railway has its headquarters at Secunderabad in Telangana.

The Southern Railway was formed on 14 April 1951 and was the first zone created when the old company railways were regrouped after independence.