MCQ_SINGLE

Match the species in List-I with their geometry in List-II. List-I: A. $PCl_{5}$ B. $BrF_{5}$ C. $BF_{4}^{-}$ D. $[Ni(CN)_{4}]^{2-}$ List-II: I. Tetrahedral II. Square Planar III. Trigonal bipyramidal IV. Square pyramidal Choose the correct answer from the options given below:

MCQ_SINGLE

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: In recombinant DNA technology, lysozyme is used for disrupting bacterial cells while cellulase is for plant cells. Reason R: Isolation of genetic material needs disruption of cells. In the light of the above statements, choose the most appropriate answer from the options given below:

MCQ_SINGLE

Given below are two statements: Statement I: Plasmids are autonomously replicating DNA. Statement II: Plasmids are extrachromosomal DNA. In the light of the above statements, choose the most appropriate answer from the options given below:

MCQ_SINGLE

In Geiger-Marsden experiment, the number of scattered $\alpha$-particles $N(\theta)$ is plotted as a function of scattering angle $\theta$. Which of the following options represents the correct plot? [Image Placeholder]

MCQ_SINGLE

Bob B of mass m at rest is hanging vertically from the ceiling via a massless string of length 10 m, as shown in the figure. Point mass A of mass m travelling horizontally with speed $10~ms^{-1}$ hits bob B elastically. The bob B rises h meter after the collision. Taking the acceleration due to gravity $g=10~ms^{-2}$ and neglecting the size of the bob, the value of h is: [Image Placeholder]

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