Tag: iit jam biotechnology previous year paper PYQ

Q.30 If ܣ and ܤ are two skew-symmetric matrices, the matrix ܣܣܤ ൅ ܤ must be(A) skew-symmetric (B) symmetric(C) invertible (D) NOT invertible The matrix AB+BAAB+BA is symmetric when AA and BB are skew-symmetric matrices. This follows […]

Q.29 The lengths of two sides of a triangle are 2 units and 3 units and the angle included by these twosides is 60 . The length of the third […]

Q.28 Let nCrnCr denote the number n!r!(n−r)!r!(n−r)!n!. Then for n=100n=100, the sum of the series 1−nC1+nC2−nC3+⋯+(−1)rnCr+⋯+(−1)nnCn1−nC1+nC2−nC3+⋯+(−1)rnCr+⋯+(−1)nnCn is (A) 0 (B) 1 (C) 2 (D) 1024 Quick Answer The given series is an alternating binomial […]

Q.27 Three NOT gates are connected in series and the output of the last gate is fed back to the input of the first one as shown in the figure. […]

Q.26 The minimum light intensity that the human eye can perceive is 10−10 W m−210−10 W m−2. The area of opening of our eye (the pupil) is approximately 0.4 cm20.4 cm2. Consider yellow light with wavelength λ=600 nmλ=600 nm. The number […]

Q.25 An archaeological sample (remains of an animal) containing 14C14C isotope of Carbon is found to give 10 beta decays per minute per gram of Carbon. It is known that the natural […]

Q.24 The major product in the following reaction is Introduction The question shows diethyl 3‑oxoglutarate treated successively with NaOEt/EtOH, Br(CH₂)₂Br, followed by acidic hydrolysis and heating, and asks for the major […]

Q.23: Meso 2,3-Dibromobutane Synthesis Question Statement The compound meso 2,3-dibromobutane is obtained by (A) electrophilic addition of HBr to (E)-1-bromobut-2-ene (B) electrophilic addition of Br2 to (E)-2-butene (C) electrophilic addition […]

Q.22: UV Spectroscopy Transitions Analysis Question Statement The UV spectrum of 2-butanone and the UV spectrum of methyl vinyl ketone (MVK) are independently recorded and compared. Among the various λmax, […]

Q.21: Rate Constant Unit Conversion Question Statement The rate constant for the reaction O(g) + O3(g) → 2O2(g) is 8.0 × 10–15 cm3 molecule–1 s–1. The rate constant in dm3 […]