The spin-only magnetic moment of \(\left[ MBr _4\right]^{2-}\) is 5.9 BM.
The metal M is:

Which one of the following correctly represents the concentration term 'ppm'?

Match List I with List II

LIST - I	LIST - II
A. \(\left( CH _3\right)_3 N, CH _3 CH _2 CH _2 NH _2\)	I. Tollen's test
B. \(HCOOH , CH _3 COOH\)	II. Lucas test
C. \(CH _3- C (= O )- CH _2- CH _2- CH _3, CH _3- CH _2- C (= O )- CH _2-CH _3\)	III. Carbylamine test
D. \(CH _3- CH _2- CH _2- CH _2- OH , CH _3- C \left( CH _3\right)( OH )- CH _3\)	IV. lodoform test

Choose the correct answer from the options given below

Match List-I (vitamin) with List-II (deficiency disease)

List-l (Vitamin)	List-II (Deficiency disease)
(A) Thiamine	(I) Convulsions
(B) Pyridoxine	(II) Cheilosis
(C) Vitamin E	(III) Retarded Growth
(D) Riboflavin	(IV) Muscular weakness

Choose the correct answer from the options given below :

Match List I with List II.

List-I	List-II
A. Vitamin C	I. Rickets
B. Vitamin A	II. Beri Beri
C. Vitamin D	III. Scurvy
D. Vitamin \(B _{ 1 }\)	IV. Night blindness

Choose the correct answer from the options given below :

Which among the following shows positive deviation from Raoult's law?

Read the passage carefully and answer:
Organic compounds derived from NH3 by replacing one or more H-atoms with alkyl or aryl groups will form primary, secondary and tertiary amines. The common methods which include their preparations are reduction of nitro group, amide group and nitrile group, Gabriel phthalimide synthesis and ammonolysis of alkyl halides. Amines are basic in nature due to the presence of a lone pair of electrons on the nitrogen atom. Important chemical properties of amines include acylation, alkylation and their interaction with nitrous acid. There are various tests which can distinguish different types of amines from each other, for e.g. carbylamine test, Hinsberg's test, coupling reaction etc. Another important class of compounds which can be derived from primary amines is azo compounds. These compounds are intensely colored and widely used as dyes in textile, leather and food industries.
Conversion of nitro group into primary amine is preferred using

A body of mass 20 g and charge \( +50 \text{ }\mu\text{C} \) is suspended from the ceiling by a string. A horizontal electric field of 10 kV/m is applied.
The angle between the string and the vertical direction is :

Choose the correct phase relationship between the current and the applied voltage in an a.c. circuit.
(A) In a pure resistive circuit, the current is in phase with the applied voltage.
(B) In a pure inductive circuit, the current lags behind the voltage by a phase angle of 90°.
(C) In a pure inductive circuit, the current leads the voltage by a phase angle of 90°.
(D) In a pure resistive circuit, the current is not in phase with the applied voltage.
Choose the correct answer from the options given below:

Which of the following is NOT correctly matched?
A. Element of 1st transition series with highest 2nd ionisation enthalpy: Cu
B. Element of 1st transition series with lowest atomisation: Zn
C. Last element of 2nd transition series : Hg
D. Element of 1st transition series with highest 3rd ionisation enthalpy : Zn
Choose the correct answer from the options given below:

Let \(*: R \times R \rightarrow R\) be defined by \(a * b=a+2 b\). Then \(*\) is:

Monochromatic lights of wavelengths \( 620 \text{ nm} \) and \( 626 \text{ nm} \), respectively are used to study diffraction at a single slit of aperture \( 0.7 \text{ mm} \). The distance between the slit and the screen is \( 1.8 \text{ m} \). The separation between the positions of the first maxima of the diffraction pattern obtained in the two cases is :

Human activities have accelerated rate of species extinction in the world. The major cause for it are
A. Habitat loss and defragmentation
B. Habitat loss and fragmentation
C. Over-exploitation
D. Alien species invasions
Choose the correct answer from the options given below: