The correct structure of the dipeptide Gly-Ala (glycyl alanine) is:

What is the correct sequence of increasing reactivity of the following compounds towards nucleophilic addition reaction?
(A) Ethanal
(B) Propanone
(C) Propanal
(D) Butanone
Choose the correct answer from the options given below :

The synthesis of Alkyl fluoride is best carried through :

The IUPAC name of allylamine is.

Choose the correct statement about chloroform.
(A) It slowly reduces in air in the presence of sunlight to form phosphene gas.
(B) It should be stored in closed dark coloured bottle completely filled to keep air out.
(C) It is when exposed to sunlight in the presence of air forms a gas phosgene.
(D) Chronic chloroform exposure causes damage to liver.
Choose the correct answer from the options given below :

When we consider a balanced chemical equation of an elementary reaction which statement is applicable on it?
(A) Molecularity can never be zero
(B) Order is less than molecularity
(C) Order is equal to molecularity
(D) Order is greater than the molecularity
Choose the correct answer from the options given below:

"Arrange the following elements in decreasing order of their radii:
(A) La
(B) Pr
(C) Gd
(D) Yb
Choose the correct answer from the options given below:"

The function \(f:[0,1] \rightarrow R\) given by \(f(x)=\alpha x^3\) has:

A proton accelerated through a potential difference of V volts has a de-Broglie wavelength \( \lambda \) associated with it. In order to get the same wavelength with an \( \alpha \)-particle, the required accelerating potential is

Which of the following gives the correct expression for potential gradient in terms of the resistivity ( \(\rho\) ) of the wire?

The rate of a first order reaction is 0.06 mol \(L^{-1} s^{-1}\) after 20 seconds and 0.03 mol \(L^{-1} s^{-1}\) after 30 seconds from the start of the reaction. The half life period of this reaction is

Answer the question on the basis of passage given below :
There are some deposits of nitrates and phosphates in the earth’s crust. Nitrates are more soluble in water. Nitrates are difficult to reduce under laboratory conditions, but microbes do it easily. Ammonia forms a large number of complexes with transition metals. Hybridisation easily explains the ease of sigma donation capability of NH₃ and PH₃. Phosphine is an inflammable gas, prepared from white phosphorus.
Which of the following is the correct statement?
A. Between NH₃ and PH₃, NH₃ is a better electron donor because the lone pair of electrons occupy spherical 's' orbital and is less directional.
B. Between NH₃ and PH₃, NH₃ is a better electron donor because the lone pair of electrons occupies sp³ orbital and is more directional.
C. Between NH₃ & PH₃, PH₃ is a better electron donor because the lone pair of electrons occupies sp² orbital and is more directional.
D. Between NH₃ & PH₃, PH₃ is a better electron donor because the lone pair of electrons occupies 's' orbital and is less directional.
Choose the most appropriate answer from the options given below:

The resistance of a galvanometer is G = 30 \( \Omega \). It gives full scale deflection for \( I_g = 2 \text{ mA} \). It is to be converted into an ammeter to measure current I = 0.3 A. The value of the shunt required is approximately