A) 1 is correct | B) 2 is correct |

C) 3 is correct | D) 4 is correct |

Explanation:

Van't Hoff factor (i) = $\frac{ObservedColligativeProperty}{NormalColligativeProperty}$

$\begin{array}{c}{A}_{x}{B}_{y}\\ 1-\alpha \end{array}\to \begin{array}{c}x{A}^{+y}\\ x\alpha \end{array}+\begin{array}{c}y{B}^{-x}\\ y\alpha \end{array}$

Total Moles = $1-\alpha +x\alpha +y\alpha $ = $1-\alpha \left(x+y-1\right)$

$i=\frac{1+\alpha \left(x+y-1\right)}{1}$

$\Rightarrow \alpha =\frac{i-1}{x+y-1}$

A) An acetylenic triple bond | B) Two ethylenic double bonds |

C) A vinyl group | D) An isopropyl group |

Explanation:

$C=\}C{H}_{2}\stackrel{Ozonolysis}{\to}HCHO$

Vinylic group.

A) Pentagonal bipyramid | B) Square pyramid |

C) Trigonal bipyramid | D) Octahedral |

Explanation:

Hybridisation of iodine is $s{p}^{3}{d}^{3}$

So, the structure is **pentagonal bipyramid**.

A) 204.60 g | B) 304.30 g |

C) 804.32 g | D) 400.00 g |

Explanation:

$\u2206{T}_{f}={k}_{f}.m$

for ethylene glycol in aq. solution

$\u2206{T}_{f}={k}_{f}\frac{w}{mol.wt}\times \frac{1000}{wt.ofsolvent}\phantom{\rule{0ex}{0ex}}6=\frac{1.86xwx1000}{62x4000}$

=> w = 800 g

So, the weight of solute should be more than 800 g.

A) 1.41 BM | B) 1.82 BM |

C) 5.46 BM | D) 2.82 BM |

Explanation:

Hybridisation of Ni is ${e}^{-}$

Unpaired $3{d}^{8}$in is 2

So $\Omega =\sqrt{n(n+2)}BM\phantom{\rule{0ex}{0ex}}=\sqrt{2x4}=\sqrt{8}=2.82BM$

A) Statement I is the cause and statement II is its effect | B) Statement II is the cause and statement I is its effect |

C) Both the statements I and II are effects of independent causes | D) Both the statements I and II are effects of some common cause |

Explanation:

The facts given in both the statements are clearly the result of acute power shortage.