Which of the following statement(s) is/are correct with reference to electrophilic aromatic substitution of \(\text{C}_6\text{H}_5\text{Cl}\)?
(A) Cl acts as an activating and o/p directing group
(B) Cl acts as a deactivating and o/p directing group
(C) acts as an activating and m directing group
(D) Cl acts as a deactivating and m directing group
(E) Presence of \(\text{NO}_2\) at p-position facilitates the reactions
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Arrange the metal ions of the following compounds in increasing order of oxidation number :
(A) \(\text{TiCl}_3\)
(B) \(\text{CrF}_6\)
(C) \(\text{ZnO}\)
(D) \(\text{Mn}_2\text{O}_7\)
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The number of peptide linkages in a tripeptide containing three amino acids is :

What is the product of the following reaction?
\(R-CN \frac{H_2 / Nl}{Na\left(H_{g}\right) / C_2 H_6 OH}\)
The options are:

A first order reaction is found to have a rate constant \(k = 5.5 \times 10^{-14}\ s^{-1}\).
Find the half-life of the reaction.

The composition of starch in amylopectin is

___________ solution of phenol in water acts as a disinfectant.

A thin equiconvex lens of radius of curvature R made up of glass \( (\mu_g = 1.5) \) is dipped in water \( (\mu_w = 1.3) \). Its focal length in water is:

Read the paragraph given below and answer the question.
Insulin used for diabetes was earlier extracted from slaughtered cattle and pigs. Insulin from an animal source, though caused some patients to develop allergy or other type of reactions. Insulin consists of two short polypeptide chains: chain A and chain B, that are linked bridges. In mammals, including human, insulin is synthesised as a pro-hormone.
Identify the correct statements.
(A) Insulin was earlier extracted from the liver of slaughtered animals.
(B) Eli Lilly, an American company is producing insulin using r-DNA technique.
(C) Some diabetics developed allergy with the animal sourced insulin.
(D) Pro-insulin can control diabetes.
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If \(A\) and \(B\) are square matrices of order 3 such that \(|A|=3\) and \(|B|=-1\), then \(|3 A B|\) is :

Which of the following statements is correct for the identification of a diode using a multimeter?

Select incorrect statements in reference to decomposition.
A. Decomposition rate is slower, if detritus is rich in nitrogen
B. Decomposition is largely an oxygen requiring process
C. Decomposition rate is faster if detritus is rich in lignin and chitin
D. Warm and moist environment favours decomposition
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Match List-I with List-II

List-I (Barriers)	List-II (Examples)
(A) Physical barrier	(I) Acid in the stomach
(B) Cellular barrier	(II) Interferons
(C) Cytokine barrier	(III) Leucocytes in our body
(D) Physiological barrier	(IV) Skin on our body

Choose the correct answer from the options given below: