IMI DNS PRE SCREENING TEST AUGUST 2025 IMI DNS PRE SCREENING TEST AUGUST 2025 1 / 75The quantisation of charge indicates that Charge, which is a fraction of charge on an electron, is not possible Charge exists on particles A charge cannot be destroyed There exists a minimum permissible charge on a particle 2 / 75Which of the following states that an emf is induced whenever there is a change in the magnetic field linked with electric circuits? Ohm’s Law None of the above Lenz’s Law Faraday’s Law of Electromagnetic Induction 3 / 75What happens when the light is refracted into a medium? Both frequency and wavelength of the light increase The wavelength increases but the frequency remains unchanged Both wavelength and frequency decrease The wavelength decreases but the frequency remains constant 4 / 75What is the main function of a transistor? Simplify Amplify Rectify All of the above 5 / 75SI unit of the magnetic field is _________ DYNE OHM TESLA VOLT 6 / 75lectrons in the atom are held to the nucleus by Nuclear Force Coulomb’s Force Gravitational Force Van Der Waal’s Forc 7 / 75Which of the following proves that electromagnetic waves are transverse? Reflection Diffraction Interference Polarisation 8 / 75An electromagnetic wave can be produced when the charge is moving in a circular orbit moving with a constant velocity Both (a) and (d) falling in an electric field 9 / 75 How can the fringe width increase in Young’s double-slit experiment? By decreasing the width of the slit By reducing the separation of slits By decreasing the distance between slits and the screen By reducing the wavelength of the slits 10 / 75Two light sources are said to be coherent when both the sources of light emit light of The same amplitude and phase The same intensity and wavelength The same speed The same wavelength and constant phase difference 11 / 75 An electron emitted in beta radiation originates from free electrons existing in the nuclei inner orbits of an atom photon escaping from the nucleus decay of a neutron in a nuclei 12 / 75Which of the following statements is correct? Hole is an antiparticle of electron Hole is a vacancy created when an electron leaves a covalent bond. Hole is the absence of free electrons. Hole is an artificially created particle. 13 / 75A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV. The signal wavelength is 6000 Å 6000 nm 4000 nm 5000 Å 14 / 75A convex lens of focal length 0.2 m and made of glass (amg = 1.5) is immersed in water (amw = 1.33). Find the change in the focal length of the lens. 5.8 m 0.58 cm 1.37 m 5.8 cm 15 / 75The power factor is one for which of the following? Pure capacitor Pure inductor Pure resistor All of the above 16 / 75The boiling point of an azeotropic mixture of water and ethanol is less than that of water and ethanol. The mixture shows no deviation from Raoult’s Law. positive deviation from Raoult’s Law negative deviation from Raoult’s Law. that the solution is unsaturated 17 / 75Which of the following reaction is used to make fuel cell? a b c d 18 / 75Which among the following is a false statement? Rate of zero order reaction is independent of initial concentration of reactant. Half life of a third order reaction is inversely proportional to square of initial concentration of the reactant. Molecularity of a reaction may be zero or fraction. For a first order reaction, t1/2=0.693K 19 / 75The potential difference between the fixed charged layer and the diffused layer having opposite charge is called Zeta potential Electrokinetic potential Both (a) and (b) Streaming potential 20 / 75In the leaching of Ag2S with NaCN, a stream of air is also passed. It is because The reaction between Ag2S and NaCN is reversible. To oxidise Na2S formed in the reaction to Na2SO4. to oxidise Ag2S to Ag2O Both (a) and (b). 21 / 75The set with correct order of acidity is HClO < HClO2 < HClO3 < HClO4 HClO4 < HClO3 < HClO2 < HClO HClO < HClO4 < HClO3 < HClO2 HClO4 < HClO2 < HClO3 < HClO 22 / 75CuSO4. 5H2O is blue is colour because It contains water of crystallization. SO42- ions absorb red light. Cu2+ ions absorb orange red light. Cu2+ ions absorb all colours except red from the white light. 23 / 75Which of the following has square planar structure? [NiCl4]2- [Ni(CO)4] [Ni(CN)4]2- None of the above 24 / 75Fitting reaction can be used to prepare Toluene Acetophenon Diphenyl Chlorobenzene 25 / 75In CH3 CH2 OH, the bond that undergoes heterolytical change most readily is C-C C-O C-H O-H 26 / 75Methyl ketones are usually characterised through Tollen’s reagent Iodoform test Schiff’stest Benedict solution test. 27 / 75C6H5CONHCH3 can be converted into C6H5CH2NHCH3 by NaBH4 H2-Pd/C LiAlH4 Zn-Hg/HCl 28 / 75The functional group which is found in amino acids is COOH -NH2 -CH3 both (a) and (b). 29 / 75A broad spectrum antibiotic is Paracetamol Pencillin Aspirin Chloramphenicol 30 / 75Aniline was diazotised and is subsequently reduced with tin (II) chloride and HCl. The product formed is Phenylhydrazine Aniline Phenyl aniline p-aminoazobenzene. 31 / 75 If set A contains 5 elements and the set B contains 6 elements, then the number of one-one and onto mappings from A to B is 720 120 0 30 32 / 75The domain of sin–1(2x) is [0, 1] [– 1, 1] [-1/2, 1/2] [–2, 2] 33 / 75If A and B are two matrices of the order 3 × m and 3 × n, respectively, and m = n, then the order of matrix (5A – 2B) is m × 3 3 × 3 m × n 3 × n 34 / 75The area of a triangle with vertices (–3, 0), (3, 0) and (0, k) is 9 sq. units. The value of k will be 9 3 -9 6 35 / 75Z = 7x + y, subject to 5x + y ≥ 5, x + y ≥ 3, x ≥ 0, y ≥ 0. The minimum value of Z occurs at (3, 0) (1/2,5/2) (7, 0) (0, 5) 36 / 75 ∫cot²x dx equals to cot x – x + C cot x + x + C -cot x + x + C -cot x – x + C 37 / 75If a is such that ∫a0xdx ≤ a + 4, then 0 ≤ a ≤ 4 -2 ≤ a ≤ 0 a ≤ -2 or a ≤ 4 -2 ≤ a ≤ 4 38 / 75A die is thrown again and again until three sixes are obtained. Find the probability of obtaining third six in the sixth throw of the die. 625/23329 621/25329 625/23328 620/23328 39 / 75The probability of a man hitting a target is 1/4. How many times must he fire so that the probability of his hitting the target at least once is greater than 2/3? 4 3 2 1 40 / 75Z = 7x + y, subject to 5x + y ≥ 5, x + y ≥ 3, x ≥ 0, y ≥ 0. The minimum value of Z occurs at (3, 0) (1/2,5/2) (7, 0) (0, 5) 41 / 75The optimal value of the objective function is attained at the points on X-axis on Y-axis which are comer points of the feascible region none of these 42 / 75A flashlight has 8 batteries out of which 3 are dead. If two batteries are selected without replacement and tested, the probability that both are deal is 33/56 9/28 3/28 9/64 43 / 75The number of bijective functions from set A to itself when A contains 106 elements is 106 (106)^2 106! 2^106 44 / 75If f : R → R, g : R → R and h : R → R are such that f(x) = x2, g(x) = tan x and h(x) = log x, then the value of (go(foh)) (x), if x = 1 will be 0 1 -1 π 45 / 75If a matrix A is both symmetric and skew-symmetric, then A is a diagonal matrix A is a zero matrix A is a scalar matrix A is a square matrix 46 / 75Meena asked Rohan, "Have you sat in a trolley bus before? Meena asked Rohan had he sat in a trolly bus earlier Meena asked Rohan had he sat in a trolley bus before. Meena asked Rohan if he has ever sat in a trolley bus Meena asked Rohan if he has ever sat in a trolley bus 47 / 75After six months, you can also speak in English ______ me. around like about without 48 / 75 All the winners _______ prizes tomorrow. will be given will given will be giving will have given 49 / 75You will see signs of ______ everywhere, which speak well for the ______ of these people. decoration - senses clear - debris beauty - careful industry - prosperity 50 / 75In the following questions, Four words are given in each question, out of which only one word is correctly spelt. Find the correctly spelt word. Connoisseur Conosiseur Conoiseur Connoiseur 51 / 75Select the words or group of words that is most Opposite in meaning (antonym) to the word in capital letters.Irresistible incapable weak scrumptious avoidable 52 / 75Select the words or group of words that is most Opposite in meaning (antonym) to the word in capital letters.CORPULENT Lean Gaunt Emaciated Obese 53 / 75 How much did it _______ to reach Mumbai by car? Charge Price Cost Extimate 54 / 75 Before some time, the monkey jumped _______ the river on into near upon 55 / 75 Do not disturb the principal. He _______ in his chamber. (A) sleeping (B) is sleeping (C) sleeps (D) slept 56 / 75In the following questions, Four words are given in each question, out of which only one word is correctly spelt. Find the correctly spelt word. (A) Connoisseur (B) Conosiseur (C) Conoiseur (D) Connoiseur 57 / 75 Select the synonym of the given word. DRAG rest rush push pull 58 / 75 Select the antonym of the given word.GATHER disperse distract dispute display 59 / 75 Only the blood-stained road was a witness ___ his assassination to of at on 60 / 75 In the following four option find the wrongly spelt words. Foresee Foretell Foreswear Forecast 61 / 75What comes next in the series: ABC, DEF, GHI, ? JKL LMN IJK JMN 62 / 75Choose the word that cannot be formed using letters from “ENCOURAGEMENT”: COURAGE MEANT GENERATE CEMENT None of the Incorrect 63 / 75If “CAT” is coded as “DBU,” how is “DOG” coded? EPH EOF DPH EQH 64 / 75Which word does not belong to the group? Teacher Student Principal Office 65 / 75Complete the analogy: Tree : Forest :: Star : ? sky Night Galaxy Moon 66 / 75If “HOUSE” is written as “IPVTF,” how is “TABLE” written? UBCMF TBCME UBCNE UBCLF 67 / 75Rearrange the letters “TCA” to form a meaningful word. CAT ACT TAC All of these 68 / 75Which word is the opposite of “Artificial”? Fake Natural Genuine Synthetic 69 / 75Identify the missing number: 2, 6, 12, 20, ? 30 28 24 36 70 / 75Find the odd number: 2, 4, 8, 12, 16, 32 12 32 4 4 71 / 75If A is taller than B, and B is taller than C, who is the shortest? A B C Data insufficient 72 / 75A is the father of B, but B is not the son of A. Who is B Daughter Cousin Mother None of these 73 / 75Find the next number in the pattern: 1, 4, 9, 16, ? 25 20 36 36 74 / 75Arrange the following in a logical sequence: Seed, Plant, Tree, Fruit Seed, Plant, Tree, Fruit Plant, Seed, Tree, Fruit Tree, Fruit, Plant, Seed Fruit, Tree, Plant, Seed 75 / 75If 1 = A, 2 = B, 3 = C, what is 19? R S T P Your score isThe average score is 0% 0% Restart quiz
