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Indian Army GD / Technical Recruitment Technical Subjects (Soldier Technical Posts) Flashcards
51 question-and-answer cards covering Technical Subjects (Soldier Technical Posts) as it is examined in Indian Army GD / Technical Recruitment. 24 of them are printed below, taken from across the deck — no signup, no paywall on the preview.
24 sample cards from the Technical Subjects (Soldier Technical Posts) deck
Sampled from the end of the deck, so these are different cards from the ones shown on the syllabus page.
Define molarity.
Molarity (M) = moles of solute per litre of solution. Unit: mol/L.
State the ideal gas equation.
PV = nRT, where P is pressure, V is volume, n is moles, R is the gas constant (8.314 J/mol·K), and T is absolute temperature.
What is the pH scale and what does pH = 7 indicate?
pH = −log10[H+], measuring acidity/basicity from 0 to 14. pH = 7 is neutral; below 7 is acidic, above 7 is basic.
State Boyle's law and Charles's law.
Boyle's law: at constant temperature, P ∝ 1/V (PV = constant). Charles's law: at constant pressure, V ∝ T (V/T = constant).
What is the difference between an exothermic and an endothermic reaction?
Exothermic reactions release heat (ΔH negative); endothermic reactions absorb heat (ΔH positive).
How are elements arranged in the modern periodic table?
In order of increasing atomic number (number of protons), arranged in periods (rows) and groups (columns) based on recurring properties.
Name the most electronegative element and the lightest element.
Fluorine is the most electronegative element; hydrogen is the lightest element.
What is the difference between an ionic bond and a covalent bond?
An ionic bond forms by transfer of electrons (between metals and non-metals); a covalent bond forms by sharing of electrons (between non-metals).
What are isotopes?
Atoms of the same element with the same number of protons but different numbers of neutrons (same atomic number, different mass number).
Name the noble gases and state their key chemical property.
Helium, neon, argon, krypton, xenon, radon. They are chemically inert because they have completely filled outer electron shells.
What is catenation, and which element shows it most?
Catenation is the ability of an element's atoms to bond with one another forming chains/rings. Carbon shows it most strongly, enabling organic chemistry.
Differentiate saturated and unsaturated hydrocarbons.
Saturated hydrocarbons (alkanes) have only single C–C bonds; unsaturated hydrocarbons have double (alkenes) or triple (alkynes) bonds.
Give the general formula of alkanes, alkenes, and alkynes.
Alkanes: CnH2n+2; Alkenes: CnH2n; Alkynes: CnH2n−2.
What is a functional group? Give the group for alcohols and carboxylic acids.
A functional group is an atom or group that determines a molecule's chemical properties. Alcohols: −OH; carboxylic acids: −COOH.
State the quadratic formula.
For ax2 + bx + c = 0, x = [−b ± √(b2 − 4ac)] / 2a.
What does the discriminant of a quadratic tell you?
D = b2 − 4ac. If D > 0 roots are real and distinct; D = 0 real and equal; D < 0 complex (no real roots).
Define the union and intersection of two sets.
Union (A ∪ B) is the set of elements in A or B or both; intersection (A ∩ B) is the set of elements common to both A and B.
State De Morgan's laws for sets.
(A ∪ B)' = A' ∩ B' and (A ∩ B)' = A' ∪ B' — the complement of a union is the intersection of complements, and vice versa.
What is the derivative of x^n with respect to x?
d/dx (x^n) = n·x^(n−1) (the power rule).
State the integral of x^n (n ≠ −1).
∫ x^n dx = x^(n+1)/(n+1) + C, where C is the constant of integration.
Give the distance formula between two points in coordinate geometry.
d = √[(x2 − x1)2 + (y2 − y1)2].
State the values of sin, cos, and tan at 30°, 45°, and 60°.
sin: 1/2, 1/√2, √3/2; cos: √3/2, 1/√2, 1/2; tan: 1/√3, 1, √3 (at 30°, 45°, 60° respectively).
What is a determinant of a 2x2 matrix [[a, b],[c, d]]?
The determinant is ad − bc.
State the basic formula for the probability of an event.
P(E) = (number of favourable outcomes) / (total number of equally likely outcomes), where 0 ≤ P(E) ≤ 1.
What this deck covers
The Technical Subjects (Soldier Technical Posts) deck follows the Indian Army GD / Technical Recruitment Technical Subjects (Soldier Technical Posts) syllabus — 3 chapters and 11 topics — so questions land on material that is genuinely examinable rather than trivia around it. That works out to roughly 17.0 cards per chapter.
Answers are written to be recallable, not just readable — averaging about 99 characters, which is long enough to carry the reasoning and short enough to say out loud.
A deck like this earns its keep on the second and third pass. Read the syllabus first so you know the shape of the subject, then use the cards to find the specific facts that have not stuck.
Technical Subjects (Soldier Technical Posts) flashcards FAQ
How many Technical Subjects (Soldier Technical Posts) flashcards are in this Indian Army GD / Technical Recruitment deck?
51 cards. This page previews 24 of them, sampled evenly across the deck so you can judge the difficulty before installing anything.
Are these Indian Army GD / Technical Recruitment flashcards free?
Yes. The preview here is free to read with no signup, and the full 51-card deck is free inside the Examius app.
What do the Technical Subjects (Soldier Technical Posts) cards cover?
They follow the Indian Army GD / Technical Recruitment Technical Subjects (Soldier Technical Posts) syllabus — 3 chapters and 11 topics — so the questions track what is actually examinable.
How should I use these flashcards?
Read the syllabus first so you know the shape of the subject, then drill the deck. Examius schedules each card with spaced repetition, so cards you keep missing come back sooner and ones you know drift further apart.