What is the packing efficiency of simple cubic lattice?

Which of the following set of reagents will convert aniline to p-nitroaniline?

Read the passage carefully and answer the Questions
Aldehydes and ketones are important organic compounds prepared mainly by oxidation of alcohols. Primary alcohols give aldehyde and secondary alcohols yield ketones. Aldehydes can also be formed by partial reduction of acid chlorides, reduction
of esters or by Gattermann-Koch reaction. Ketones are prepared by Friedel-Craft's acylation, hydration of alkyne and reaction of Grignard's reagent with nitriles. Chemically, aldehydes and ketones are reactive in nature due to the carbonyl group and undergo nucleophilic addition reactions. Aldehydes are more reactive than ketones and can be oxidized to carboxylic acids, while both can be reduced to alcohols or hydrocarbons and exhibit condensation reaction.
Hydration of propyne in the presence of \(H _2 SO _4\) and \(HgSO _4\) gives

Ambidentate ligand among the following is
A. NCS
B. \(\text{C}_2\text{O}_4^{2-}\)
C. SCN
D. \(\text{H}_2\text{NCH}_2\text{CH}_2\text{NH}_2\)
E. \(\text{NO}_2\)
Choose the correct answer from the options given below :

\(2 N_2 O _5 \rightarrow 4 NO _2+ O _2\)
At a given instant of time, the rate and rate constant are 1.02 \(\times\) 10\(^-\)\(\mathrm{4}\) mol L\(^-\)\(\mathrm{1}\) s\(^-\)\(\mathrm{1}\) and 3.4 \(\times\) 10\(^-\)\(\mathrm{5}\) s\(^-\)\(\mathrm{1}\), respectively.
The concentration of N\(_2\)\(\mathrm{O}\)_5 at that time will be:

Match List-l with List-II

List-l (Order of reaction)	List-II (Expressions/Unit)
(A) Unit of zero order	(I) \(k t=[ R ]_0-[ R ]_t\)
(B) Unit of First order	(II) \(mol L ^{-1} s^{-1}\)
(C) Integrated Rate Law for zero order	(III) \(s^{-1}\)
(D) Integrated Rate Law for First order	(IV) \([ R ]=[ R ]_0 e^{-k t}\)

Choose the correct answer from the options given below :

Hybridization of carbon atoms attached with halogens in haloalkanes \\& haloarenes are

Two long coaxial solenoids of the same length L have inner and outer coils with diameters \( D_1 \) and \( D_2 \) and number of turns \( N_1 \) and \( N_2 \), respectively. What will be the ratio of the self-inductance of the inner solenoid to the mutual inductance of both the solenoids?

If \(A\) is a non-singular matrix of order 3 such that \(|\operatorname{adj}(A)|=121\), then \(\left|A A^T\right|\) is equal to :

The correct expression for osmotic pressure of the solution involving dissociation of the solute is

Read the following paragraph carefully and answer the given questions.
Certain types of leukocytes (WBC) of our body like polymorpho-nuclear leukocytes (PMNL-neutrophils) and monocytes and natural killer (type of lymphocytes) in the blood as well as macrophages in tissues can phagocytose and destroy microbes. For determining the cause of allergy, the patient is exposed to or injected with very small doses of possible allergens, and the reactions studied. The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy. Heroin, commonly called smack is chemically diacetylmorphine which is a white, odourless, bitter crystalline compound. This is obtained by acetylation of morphine. Techniques like radiography (use of X-rays), CT (computed tomography) and MRI (magnetic resonance imaging) are very useful to
detect cancers of the internal organs. Different species of Plasmodium (P. vivax, P. malaria and P. falciparum) are responsible for different types of malaria. Of these, malignant malaria caused by Plasmodium falciparum is the most serious one and can even be fatal.
Which of the following cells are involved in phagocytosis and destruction of microbes?

Which of the following does not belong to the first transition series ?

Name the reaction when carboxyclic acids having an a -hydrogen are halogenated at the a-position on treatment with chlorine in the presence of a small amount of red phosphorus.