csirhrdg.nic.in UGC National Eligibility Test Question Paper Model : Council of Scientific & Industrial Research

Organisation : Council of Scientific & Industrial Research
Exam : CSIR-UGC National Eligibility Test (NET) EXAM
Document type : Model Question Paper
Website :csirhrdg.nic.in

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UGC Question Paper :

CHEMICAL SCIENCES
This Test Booklet will contain 145 (20 Part `A- +50 Part `B+75 Part „C- ) Multiple Choice Questions (MCQs).

Related : ARCH Academy All India Entrance Examination for Design Question Paper : www.pdfquestion.in/14081.html

Candidates will be required to answer 15 in part „A- , 35 in Part „B- and 25 questions in Parts C respectively ( No. of question to attempt may vary from exam to exam). In case any candidate answers more than 15, 35 and 25 questions in Parts A, B and C respectively only first 15, 35 and 25 questions in Parts

MODEL QUESTION PAPER
PART A
May be viewed under heading “General Science”
PART B
21. [CoCl4]2- shows a deep blue colour because of
1. metal to ligand charge transfer transition
2. ligand to metal charge transfer transition
3. spin allowed and Laporte forbidden d-d transition
4. spin allowed and Laporte allowed d-d transition

22. The violet colour of iodine vapour is due to
1. n– * transition 2. – — * transition 3. n– * transition 4. – *– * transition

23. Choose the correct statement among the following
1. diamond has lower thermal and electrical conductivities compared to graphite
2. diamond has similar thermal and electrical conductivities compared to graphite
3. diamond has higher thermal conductivity but lower electrical conductivity compare
4. diamond has the same thermal but lower electrical conductivity compared

24. Which of the following is a nido-borane-
1. B4H10 2. B5H9 3. [B6H6]2- 4. B5H11
25. The oxidation number of sulphur in dithionite [S2O4]2- and dithionat
1. +3 and +4 2. +3 and +5 3. +4 and +5 4. +4 and +6

26. Among the three types of orbitals p, d, and f,
1. both p and f orbitals have centre of symmetry
2. both p and d orbitals have centre of symmetry
3. only d orbitals have centre of symmetry
4. f orbitals alone have centre of symmetry

27. The absorbance of solution having 20% transmittance is
1. 0.301 2. 0.699 3. 1.301 4. 1.699
28. The active site of enzyme nitrogenase contains
1. Mo 2. Mn 3. Fe 4. Cu
29. Which one of the following is a free radical :
1. CO 2. CN– 3. NO 4. CS

30. Choose the 16 e– complex from the following :
1. Ni(CO)4 2. Rh(PPh3)3Cl 3. Fe(CO)5 4. (- 6-C6H6)2Cr
31. The species having metal-metal bond is :
1. Mn2(CO)10 2. Al2(CH3)6 3. V2(O)12 4. Al2(OPri)12

32. Choose the INCORRECT statement from the following
1. Fluorine has higher electronegativity than chlorine
2. Fluorine molecule (F2) has lower bond energy than chlorine molecule (Cl2)
3. Fluorine has higher electron affinity than chlorine
4. Fluorine has a lesser tendency to form cation than chlorine

33. The only molecule having bridging oxygen is
1. Phosphorus trioxide 2. Phosphorus pentaoxide 3. Cyclic tetraphosphate
34. The coordination number of phosphorus in [PMo12O40]3- is
1. 2 2. 4 3. 5 4. 6

35. Using phenolphthalein as the indicator, which of the following
1. acetic acid with pyridine
2. oxalic acid with sodium hydroxide
3. hydrochloric acid with aniline
4. sulphuric acid with aqueous ammonia

36. Which of the following species is ESR-active-
1. VOSO4 2. K2Cr2O7 3. KMnO4 4. [Co(NH3)6]Cl3

37. Ozone (O3) absorbs UV radiation in the atmosphere and is decomposed mainly into
1. O2, O
2. O2-, O2+
3. O22-, O+
4. atomic oxygen

38. Large derivation from Trouton’s rule is observed for systems which are
1. having more ordered structure
2. having more disordered structure
3. having low melting points
4. having low boiling points

39. The concentration of a reactant decreases linearly with time. What is the order of the reaction?
1. 1st order
2. Fractional order
3. 2nd order
4. Zero order

40. The point group symmetry of the molecule cis–ML4 X2 is
1. C4v
2. D4h
3. C2h
4. C2v

41. The point group symmetries of a square and a rectangle respectively, are
1. D4h and D2h
2. C4h and C2h
3. D4h and C2h
4. C4h and D2h

42. The number of rotational degrees of freedom of CO2 is
1. one
2. two
3. three
4. four

43. The magnitude of the nuclear spin angular momentum of a nuclei is 15 /2 units. The value of I is
1. 5/2
2. 1/2
3. 1
4. 3/2

44. Identify the molecule whose rotational constant can not be determined by spectroscopic methods.
1. CH4
2. H2
3. CO2
4. HCl