The characteristic oxidation state of Lanthanoids is +3, but Ce shows +4 oxidation state because…
(A) It has variable ionization enthalpy
(B) It has a tendency to attain noble gas configuration
(C) It has a tendency to attain \(f^0\) configuration
(D) It resembles \(\mathrm{Pb}^{4+}\)

"The correct statement regarding the basicity of arylamines is :
A. Arylamines are generally more basic than alkylamines because of aryl group.
B. Aryl amines are generally more basic than alkylamines because the nitrogen atom in arylamines is 𝑠⁢𝑝 hybridised.
C. Aryl amines are generally less basic than alkylamines because the lone pair of electrons of nitrogen are delocalised by interaction with the pi electrons of the aromatic ring.
D. Aryl amines are generally more basic than alkylamines because the lone pair of electron of nitrogen are not delocalised by interaction with the pi electrons of aromatic ring.
E. Aryl amines are generally weaker bases than alkylamines due to electron withdrawing nature shown by aryl group.
Choose the correct answer from the options given below:"

Certain Aldehydes, Retore and certain alcohol undergo iodoform test. Certain Aldehydes ketones undergo aldol condensation. While certain aldehydes undergo Cannizaro's reaction. Aldehydes responds to tollen reagent and fehling reagent test.
Which amongst the following undergo iodoform test?
A. \(CH_3OH\)
B. \(CH_3CH_2OH\)
C. \(CH_3CH(OH)CH_3\)
D. \(CH_3CH_2CH_2OH\)
Choose the correct option

Match List I with List II.

List-I	List-II
A. \(KMnO _4\)	I. Orange
B. \(K _2 Cr _2 O _7\)	II. Green
C. \(K _2 CrO _4\)	III. Yellow
D. \(K _2 MnO _4\)	IV. Purple

Choose the correct answer from the options given below :

Partial Roasting of chalcopyrite produces :

The number of unpaired electrons in gaseous ions \(Mn ^{3+}, V ^{3+}, Cr ^{3+}\) are respectively:

The isotope \({ }^{42} K\) has a half life of about 12 hours. What fraction of the initial concentration remains after 48 hours?

In the decay chain given below the sequential order in which the radioactive radiations are emitted will be :
\(^{A}_{Z}X \to ^{A}_{Z+1}Y \to ^{A-4}_{Z-1}P^* \to ^{A-4}_{Z-1}P\)

Which of the followings were dominant during the 'Jurassic' period?
(A) Ferns
(B) Seed ferns
(C) Conifers
(D) Dinosaurs
Choose the correct answer from the options given below:

The oxidation number of Co in the complex \(\left[ Co \left( H _2 NCH _2 CH _2 NH _2\right)_3\right]_2\left( SO _4\right)_3\) is:

The nuclide having maximum value of binding energy per nucleon is

Which of the following is true for the given reaction?
\(\text{CH}_3-(\text{CH}_3)_3\text{C-N-CH}_3 + \text{Cl-SO}_2-\text{C}_6\text{H}_5 \rightarrow \text{No Reaction}\)

Match List I with List II

List - I	List - II
(A) Bacillus thuringiesis	(I) Synthetic Human Insulin
(B) Agrobacterium	(II) ADA gene therapy
(C) E. Coli	(III) Cry gene
(D) Retroviral Vector	(IV) Vector carrying nematode-specific genes

Choose the correct answer from the options given below: