In the reaction the electrophile involved is

Which among the following salt solutions is basic in nature?

Which of the given compounds can exhibit tautomerism ? Given :

For the chemical reaction \(\mathrm{N}_{2}(\mathrm{g})+3 \mathrm{H}_{2}(\mathrm{g}) \rightleftharpoons 2 \mathrm{NH}_{3}(\mathrm{g})\) the correct option is

Predict the correct intermediate and product in the following reaction : \({H_3}C - C \equiv CH\,\xrightarrow[{HgS{O_4}}]{{{H_2}O,\,{H_2}S{O_4}}}\,\mathop {Intermediate}\limits_{(A)} \,\)\( \to \,\mathop {\Pr oduct}\limits_{(B)} \)

The correct statement regarding \(RNA\) and \(DNA,\) respectively is

Under isothermal and reversible conditions, the term "free energy" in thermodynamics signifies

Which of the following statements are correct with reference to a transcription unit ?
A. A transcription unit in DNA is defined primarily by three regions : promoter, structural gene and terminator.
B. The promoter is said to be located towards the \(5^{\prime}\)-end of the structural gene.
C. The promoter is a DNA sequence that provides binding site for RNA polymerase.
D. The promoter defines the template and coding strands.
E. The terminator is located towards the \(3^{\prime}\)-end of the coding strand and it defines the end of the process of transcription.
Choose the correct answer from the options given below :

A button cell used in watches function as following. \(Zn_{(s)} + Ag_2O_{(s)} + H_2O_{(l)} \rightleftharpoons  \)\(2Ag_{(s)} + Zn^{2+}_{(aq)}+ 2OH^-_{(aq)}\) If half cell potentials are \(Zn^{2+}_{(aq)} + 2e^- \rightarrow Zn_{(s)}\,;\,\, E^o = - 0.76\, V\) \(Ag_2O_{(s)} + H_2O_{(l)} + 2e^- \rightarrow 2Ag_{(s)} + 2OH^-_{(aq)}\,,\)\(E^o = 0.34\, V\) The cell potential will be ........... \(V.\)

Twenty seven drops of same size are charged at \(220\, \mathrm{~V}\) each. They combine to form a bigger drop. Calculate the potential of the bigger drop. (In \(\mathrm{~V}\))

Match the following columns and select the correct option:

Column \(I\)	Column \(II\)
(\(a\)) Dragonflies	(\(i\)) Biocontrol agents of several plant pathogens
(\(b\)) Bacillus	(\(ii\)) Get rid of Aphids thuringiensis and mosquitoes
(\(c\)) Glomus	(\(iii\)) Narrow spectrum insecticidal applications
(\(d\)) Baculoviruses	(\(iv\)) Biocontrol agents of lepidoteran plant pests
	(\(v\)) Absorb phosphorus from soil

If a colour­blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour­blind is

Choose the correct statement regarding GIFT to overcome infertility.