A solution containing \(10 g / dm ^3\) of urea \(\left( NH _2 CONH _2\right)\) is isotonic with a 10 % solution of a non-volatile solute. The molecular mass of the solute is :

Aspartame is not used in hot drinks as sweetener because :

Which among the following is not a broad spectrum antibiotic?

Read the passage carefully and answer the questions
The chemical reactions proceed at different rates which depend on various factors like concentration, temperature, etc. Rate law is an expression which relates the rate of reaction with concentration of various reacting species in the reaction. For a first order reaction, the concentration of the reactant after time \(t\) is related with its initial concentration by the relation, \(C=C_0 e^{-k t}\). The rate constants for different orders have different expressions. For a first order reaction, \(k=\frac{2.303}{t} \log \frac{a}{a-x}\), where \(a\) is the initial concentration and \(x\) is the extent of reaction.
The quantity k in a rate law expression is

Low concentration of oxygen in the blood and tissues of people living at high altitude is due to :

On dissolving sugar in water at room temperature it feels cool to the touch. Under which of the following cases, dissolution of sugar will be most rapid?

\(\alpha\)-D(+) Glucose and \(\beta\)-D(+) Glucose are

Match List-l with List-II

List-l (Genes of lac Operon)	List-II (Codes for)
(A) i	(I) \( \beta \)-galactosidase
(B) z	(II) Transacetylase
(C) a	(III) Permease
(D) y	(IV) Repressor

Choose the correct answer from the options given below:

Observe the diagram and answer the following questions:

Which enzyme can form DNA from RNA?

Two nuclei have mass numbers in the ratio 1:8. The ratio of their nuclear radii would be :

The position vector of a point which divides the line joining the points with position vectors \((\vec{a}-2 \vec{b})\) and \((2 \vec{a}+\vec{b})\) externally in the ratio \(2 : 1\), is

Identify the chiral molecule from the following,

Choose the correct answer from the options given below :

The non-negative remainder when \(7^{30}\) is divided by 5 is :