Consider a mass-spring system where a 4 kg mass is attached to a massless spring of constant k 196 N/m; the system is set to oscillate on a frictionless, horizontal table. The mass is pulled 25 cm away from the equilibrium position and then released. (2 ...

In B2H6 (1) BH3 is a lewis base (2) External B-H bonds have less p-character (3) All bond angles are 120° (4) B-H-B bonds are not identical

Which among the following is true ? (1) Buna-N is a natural polymer (2) Buna-N's manufacture requires nascent oxygen (3) Neoprene is addition co-polymer and used in bucket formation (4) Buna-S is straight linear polymer and is thermosetting plastic

The area of the region defined by $5x^2\leq y\leq 2x^2+9$ is (1) $6\sqrt3$ (2) $12\sqrt3$ (3) $18\sqrt3$ (4) $9\sqrt3$

Find the value of n+1C2 + 2(2C2 + 3C2 + …… + nC2) = ? (1) $n(n+1)(2n-1)\over6$ (2) $n(n+1)(2n+1)\over6$ (3) $(n-1)n(n+1)\over6$ (4) $n(n+1)\over2$

Which of the following have both the compound isostructural. (A) TiCl4, SiCl4 (B) SO42-, CrO42- (C) NH3, NO3– (D) ClF3, BCl3 (1) A,B (2) A,C (3) B,C (4) A,D

Which of following is tautology ? (1) $A\land(A\to B)\to B$ (2) $B\to(A\land A\to B)$ (3) $A\land (A\lor B)$ (4) $(A\lor B)\land A$

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