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NDA

The National Defence Academy entrance exam is conducted by the UPSC, twice a year. Comprehensive topic-wise preparation is available, separately under Mathematics, Science, English, GK, apart from Mock and Sectional tests.

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Official Science Preparation for NDA

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This thread is dedicated to preparation for Science section of NDA. You may share questions from subjects like Physical Chemistry, Organic Chemistry, Inorganic Chemistry, Physics of Semiconductors, Nuclear Physics, Atomic Physics, Wave Optics, Ray Optics, Electromagnetic Induction, Electrodynamics, Electrostatics, Thermodynamics, Heat, Sound, Waves, Mechanics etc.

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Surya

Posted 21 days ago

Solution of sodium metal in liquid ammonia is strongly reducing due to the presence of

Mathematics Preparation for NDA

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This thread is dedicated to preparation for Mathematics section of NDA. You may share questions related to topics like Integral Calculus, Complex Numbers, Matrices and Determinants, Vectors, 3-D Geometry, Sequence/Series, Trigonometry, Co-Ordinate Geometry, Exponential and Logarithmic Series, Modern Algebra, Statistics, Differential Calculus, Functions and Equations, Permutation and Combination, Probability etc.

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Lop Lobo

Posted 2 months ago

Let a, b, c be distinct numbers in G.P. such that a² + b² + c² = s² and a + b + c = s. The sum of common ratio and its reciprocal is t. The value of t in terms of is

Objective English Preparation for NDA

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This thread is dedicated to preparation for Objective English section of NDA. You may post questions related to topics like Error identification, Reading Comprehension, Syllogisms, Logical Reasoning, Sentence Completion, Verbal Analogy, Odd Word Out, Paragraph Completion, Jumbled Sentence, Sentence Completion, Antonyms, Synonyms etc.

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Navin Kumar Acharya

Posted 3 months ago

Find error in underlined parts (a), (b) or (c) and mark the answer accordingly. If you feel that there is no error in a sentence, then mark (d) which signifies no error.

(a) If it were not (b) for you, (c) I would not be alive today. (d) No error