Gabriel synthesis is used for the synthesis of:

Gabriel phthalimide synthesis is used for the preparation of

Transition metal ions having zero unpaired electrons are:
(A) \(Sc^{3+}\)
(B) \(Ti^{3+}\)
(C) \(Cu^{2+}\)
(D) \(Zn^{2+}\)
(E) \(Mn^{2+}\)
Choose the correct answer from the options given below:

The gold number range of some of the lyophilic colloids is given below:
A: 0.005-0.01, B: 0.15-0.25, C: 0.04-1.0, D: 15-25
Which among these can be used as a better protective colloid?

Read the passage carefully and answer the Questions
The term vitamin was coined from the word vital +amine since the earlier identifiedc ompounds had amino groups. Later work showed that most of them didn't contain amino groups. They are very essential for the body. They has to be taken various diet or in the form of medicines also.
Vitamins are classified into two groups depending upon their solubility in water or fat.
Fat soluble vitamins are soluble in fat and oils but insoluble in water. They are stored in liver and adipose (fat storing) tissues Water-soluble vitamins are soluble in water. These must be supplied regularly in diet because they are readily excreted in urine and cannot be stored in our body.
What are the sources of Vitamin C?

Match List - I with List - II

List - I	List - II
(A) Chloroxylenol + terpineol	(I) Antiseptic
(B) Penicillin	(II) Antibiotic
(C) Iproniazid	(III) Tranquillizer
(D) Aspirin	(IV) Analgesic

Choose the correct answer :

Match List-l with List-ll

List-l (Electronic configuration)	List-II (lon)
(A) \([ Ar ] 3 d^{10}\)	(I) \(Ce ^{4+}\)
(B) \(\left[ X _{ e }\right]\)	(II) \(Cu ^{+}\)
(C) \([ Rn ]\)	(III) \(Th ^{4+}\)
(D) \([ Xe ] 4 f^{11} 5 d^1\)	(IV) \(Lu ^{2+}\)

Choose the correct answer from the options given below:

The generalised communication system will have following essential components in sequence in a block diagram.
(A) Transmitter
(B) Channel
(C) Receiver
(D) Information source
(E) User of information
Choose the correct answer from the options given below :

A vector of magnitude 8 units in the direction perpendicular to both the vectors \(\hat{i}+\hat{j}+\hat{k}\) and \(2 \hat{i}+\hat{k}\) is

Which one of the following statements does not improve the reproductive health of society?

Match List - I with List - II.

List - I (Electromagnetic waves)	List - II (Uses)
(A) Radio waves	(I) Aircraft navigation
(B) Ultraviolet rays	(II) Physical therapy
(C) Infrared waves	(III) Television communication systems
(D) Microwaves	(IV) Kill germs in water purifiers

Choose the correct answer from the options given below :

The presence of additional copy of X chromosome in humans lead to

DNA fragments can be separated by a technique known as: