The major product in the following reaction is :
\(C _6 H _5 CH = CH _2+ HI \rightarrow ?\)

A reaction takes 30 minutes to complete 50\(\%\) of the reaction and takes 45 minutes to complete 75\(\%\) of the reaction. The order of the reaction is :

The relative order of reactivity of \(1^\circ, 2^\circ, 3^\circ\) alcohol towards dehydration is :

The reagent involved in the Clemmensen reduction of carbonyl compound is

Mercury is not considered as transition metal however it has tendency to react with chlorine to form chlorides \(X\) and \(Y\).
\(X\) reacts with \(K I\) to give red ppt while \(Y\) doesn't react. On the contrary, \(Y\) reacts with \(NH _4 OH\) to give a black ppt. Predict the formula of \(X\) and \(Y\) :

Haloform test is given by
(A) Formaldehyde
(B) Acetone
(C) \(\alpha\)-Phenyl ethyl alcohol
(D) Acetaldehyde
Choose the correct answer from the options given below:

Chlorine containing antibiotic produced by soil microorganisms which is effective for the treatment of typhoid fever is :

Read the following passage carefully and answer the given questions.
Insulin consists of two short polypeptide chains- chain A and chain B, that are linked together by disulphide bridges. Some strains of Bacillus thuringiensis produce proteins that kill certain insects such as lepidopterans, coleopterans and dipterans. Bt toxin protein is converted into an active form of toxin due to the alkaline pH of the gut which solubilise the crystals. Transgenic animals that produce useful biological products can be created by the introduction of the portion of DNA (or genes) which codes for a particular product such as human protein (alpha-1-antitrypsin) used to treat emphysema. Plants, bacteria, fungi and animals whose genes have been altered by manipulation are called Genetically Modified Organisms (GMO). GM plants have been useful in many ways. Genetic modification has: (i) made crops more tolerant to abiotic stresses. (ii) reduced reliance on chemical pesticides (pest-resistant crops). (iii) helped to reduce post harvest losses. (iv) increased efficiency of mineral usage by plants (this prevents early exhaustion of fertility of soil). (v) enhanced nutritional value of food.
Which one of the followings is not true about insulin?

Which cell is rechargeable?

Match List 1 with List 2.

List 1 (Differential equation)	List 2 (Sum of order and degree)
(A) \(\frac{d^2 y}{d x^2}+\frac{d y}{d x}+3 y=\sin x\)	(I) 2
(B) \(\frac{d y}{d x}=\sin (x+y)\)	(II) 3
(C) \(\sqrt{1+\left(\frac{d y}{d x}\right)^2}=\frac{d^2 y}{d x^2}\)	(III) 4
(D) \(x^2\left(\frac{d^2 y}{d x^2}\right)^3+y\left(\frac{d y}{d x}\right)^4+y^3=0\)	(IV) 5

Choose the Correct answer from the options given below :

Two percent of the bolts manufactured in a factory are found to be defective. Using the Poisson distribution, the probability that in a sample of 100 bolts chosen at random, exactly two will be defective, is : [Given \(e^{-2}=0.135\)]

An element \( \Delta \vec{l} = 0.5 \hat{j} \text{ cm} \) is placed at the origin and carries a large current \( I = 10 \text{ A} \). The magnetic field at point (50 cm, 0) is

At what rate of interest will the present value of a perpetuity of Rs. 1000 payable at the end of every six months be Rs. 20000?