Arrange the following amines in the order of decreasing basic character in gaseous phase:
(A) \(\text{NH}_3\)
(B) \((\text{CH}_3)_3\text{N}\)
(C) \((\text{CH}_3)_2\text{NH}\)
(D) \(\text{CH}_3\text{NH}_2\)
Choose the correct answer from the options given below:

Answer the question on basis of passage given below :
Look at the following chemical reactions and answer the following question:
(A) \(C_7H_8 \xrightarrow{\text{Conc. HNO}_3, 0^\circ C}
(B) \xrightarrow{Sn/HCl}
(C) \xrightarrow{NaNO_2/H_3O^+}
(D) \xrightarrow{H_2O, Heat} (E)\)
(E) \(CH_3I \xrightarrow{KMnO_4/H^+}
(F) \xrightarrow{H_3O^+}
(G) \xrightarrow{NaOH} (H)\)
Which of the following compounds will form dimer ?

Match List I with List II

LIST I	LIST II
A. Solvent used in perfumes	I. Phenol
B. Starting material for picric acid	II. Glycerol
C. Wood Spirit	III. Methanol
D. By product of soap industry used in cosmetics	IV. Ethanol

Choose the correct answer:

If half life for a first order reaction of A is 2 minutes, how long will it take \([\text{A}]\) to reach 10% of its initial concentration?

Match List - I with List - II.

List-I	List - II
(A) Ranitidine	(I) Tranquilizer
(B) Furacine	(II) Antibiotic
(C) Phenelzine	(III) Antihistamine
(D) Chloramphenicol	(IV) Antiseptic

Choose the correct answer from the options given below :

Arrange the following acids in increasing order of their acidic strengths: \(HCOOH , FCH _2 COOH , NO _2 CH _2 COOH , ClCH _2 COOH\)

A compound is formed by two elements X and Y.
Atoms of 'Y' make ccp and those of element 'X' occupy tetrahedral voids.
The formula of the compound is:

The magnitude of the electric and magnetic fields in an electromagnetic wave are related as :

A car starts from a point \(P\) at time \(t=0\) seconds and stops at \(Q\).
The distance \(x\), in meters, covered by it in \(t\) seconds is given by \(x(t)=t^3\left(3-\frac{t^2}{5}\right)\).
The distance between \(P\) and \(Q\) is:

Determinant is unaltered if :

Sodium salts of carboxylic acids \(( RCOONa )\) when heated with sodalime, yield

Which transition metal group is known as coinage metals?

Read the given passage carefully and answer the questions
Salmonella typhi is a pathogenic bacterium which causes typhoid fever in human beings. Sustained high fever (39° to 40°C), weakness, stomach pain, constipation, headache and loss of appetite are some of the common symptoms of this disease. Typhoid fever could be confirmed by Widal test. Plasmodium enters the human body as sporozoites. The parasites initially multiply within the liver cells and then attack the red blood cells (RBCs) resulting in their rupture. The rupture of RBCs is associated with release of a toxic substance, haemozoin, which is responsible for the chill and high fever recurring every three to four days. There is lymphoid tissue also located within the lining of the major tracts (respiratory, digestive and urogenital tracts) called mucosa-associated lymphoid tissue (MALT). In our body, cell growth and differentiation is highly controlled and regulated. In cancer cells, there is breakdown of regulatory mechanisms. Normal cells show a property called contact inhibition by virtue of which contact with other cells inhibits their uncontrolled growth. Cancerous cells just continue to divide giving rise to masses of cells called tumors. Tumors are of two types: benign and malignant. Cannabinoids are a group of chemicals, which interact with cannabinoid receptors present principally in the brain. Generally taken by inhalation and oral ingestion, these are known for their effects on cardiovascular system of the body.
Which one of the following structures constitute about 50 percent of the lymphoid tissue in the human body?