Official Entrance Archive
54 Solved Questions
CCS HAU Chemistry (रसायन विज्ञान) Solved Questions
Explore all verified entrance examination questions in card view. Click "Solve & Solution" on any card to view the complete solution, KaTeX rationale, and interactive answer testing.
4-Yr B.Sc
Q.1
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Among the following, the most stable complex is...
4-Yr B.Sc
Q.2
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Which is the correct coordination number (C.N) and oxidation number (O.N) of the transition metal atom in [Co(...
4-Yr B.Sc
Q.3
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
In a solid, oxide ions are arranged in ccp, cations A occupy one sixth of the tetrahedral voids and cation B o...
4-Yr B.Sc
Q.4
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
On mixing acetone to methanol some of the hydrogen bonds between methanol molecules break. Which of the follow...
4-Yr B.Sc
Q.5
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
K H value for argon, carbon dioxide, formaldehyde and methane gases are 40.39, 1.67, 1.83 X 10-5 and 0.413, re...
4-Yr B.Sc
Q.6
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
The number of faradays of electricity required for electrolytic conversion of the mole of nitrobenzene to anil...
4-Yr B.Sc
Q.7
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
The positive value of the standard electrode potential of Ag +/Ag indicates that:...
4-Yr B.Sc
Q.8
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Milk is refrigerated in order to slow the rate of decomposition by bacterial action. The decrease in reaction ...
4-Yr B.Sc
Q.9
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Which of the following statements is not correct?...
4-Yr B.Sc
Q.10
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Which of the following gases shows the lowest adsorption per gram of charcoal? The critical temperatures are g...
4-Yr B.Sc
Q.11
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Freundlich adsorption isotherm is given by the expression x/m=kp 1/n. Which of the following statements are fa...
4-Yr B.Sc
Q.12
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
In the extraction of chlorine by electrolysis of an aqueous solution of sodium chloride, which of the followin...
4-Yr B.Sc
Q.13
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Which of the following pairs of ions are isoelectronic and isostructural ?...
4-Yr B.Sc
Q.14
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Which of the following hydrides is the strongest reducing agent?...
4-Yr B.Sc
Q.15
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Consider the reactions, i. Zn + Conc. HNO3 (hot) Zn (NO3)2 + X + H2O ii. Zn + dil. HNO3 (cold) Zn (NO3)2 + Y +...
4-Yr B.Sc
Q.16
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
When KMnO 4 acts as an oxidizing agent in weakly alkaline medium, the oxidation number of manganese decreases ...
4-Yr B.Sc
Q.17
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Acidified potassium dichromate solution turns green when Na 2SO3 is added to it due to the formation of:...
4-Yr B.Sc
Q.18
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
The d-electron configurations of Cr 2+, Mn2+, Fe2+ and Co2+ are d4, d5, d6 and d7, respectively. Which one of ...
4-Yr B.Sc
Q.19
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
When 2-Bromopentane is heated with potassium ethoxide in ethanol, the major product obtained is:...
4-Yr B.Sc
Q.20
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Which of the following undergoes nucleophilic substitution exclusively by S N 1mechnism?...
4-Yr B.Sc
Q.21
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
The number of possible stereoisomers for CH 3CH=CHCH2CH(Br)CH3 is:...
4-Yr B.Sc
Q.22
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
2-Methoxy-2-methylpropane on heating with HI produces:...
4-Yr B.Sc
Q.23
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
The least acidic compound among the following is:...
4-Yr B.Sc
Q.24
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
An alkene C 7H14 on reductive ozonolysis gives an aldehyde with formula C3H6O and a ketone. The ketone is:...
4-Yr B.Sc
Q.25
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
The increasing order of the rate of addition of HCN to the compounds i) Formaldehyde ii) Acetone iii) Acetophe...
4-Yr B.Sc
Q.26
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
The carboxylic acid that does not undergo Hell-Vohlard-Zelinsky reaction is:...
4-Yr B.Sc
Q.27
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
NaNO 2/HCl P/Br2 NH3 C2H5NH2 X Y Z (excess) In the above sequence, Z is:...
4-Yr B.Sc
Q.28
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
The attachment of which of the following group at para position in aniline will raise the K b value?...
4-Yr B.Sc
Q.29
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Which of the following is an example of globular protein?...
4-Yr B.Sc
Q.30
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Which one of the following is synthesized in our body by sun rays?...
4-Yr B.Sc
Q.31
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Caprolactum is the is the starting material for the synthesis of...
4-Yr B.Sc
Q.32
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
The species which can serve as an initiator for cationic polymerization is...
4-Yr B.Sc
Q.33
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Aspirin is an:...
4-Yr B.Sc
Q.34
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
The equivalent mass of iron in the reaction 2Fe + 3Cl 2 → 2FeCl3 is:...
4-Yr B.Sc
Q.35
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Which of the following sets of quantum numbers is correct for an electron in 4f subshell?...
4-Yr B.Sc
Q.36
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
The correct sequence of atomic radii is:...
4-Yr B.Sc
Q.37
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
In which of the following, the bond angle around the central atom is maximum?...
4-Yr B.Sc
Q.38
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Which of the following molecule does not exist...
4-Yr B.Sc
Q.39
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
If helium is allowed to expand in vacuum, it liberates heat because...
4-Yr B.Sc
Q.40
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
i) H 2(g) + 1/2O2(g) → H2O(I)+ x KJ ii) H2(g) + 1/2O2(g) → H2O(g) + y KJ; For the given two reactions,...
4-Yr B.Sc
Q.41
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
If the bond dissociation energies of XY, X 2, Y2 (all diatomic molecules) are in the ratio 1:1:0.5, respective...
4-Yr B.Sc
Q.42
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
What will be the correct order of vapour pressure of water, ethanol and ether at 30 0C? Given that among these...
4-Yr B.Sc
Q.43
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Which of the following will occur if a 0.1M solution of a weak acid is diluted to 0.01M at constant temperatur...
4-Yr B.Sc
Q.44
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Which of the following species involves the transfer of 5N A electrons per mole of it ?...
4-Yr B.Sc
Q.45
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
30-volume hyderogen peroxide means:...
4-Yr B.Sc
Q.46
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
The correct sequence of covalent character is represented by:...
4-Yr B.Sc
Q.47
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Which of the following is known as pyrene?...
4-Yr B.Sc
Q.48
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
The most stable carbocation amongst the following is:...
4-Yr B.Sc
Q.49
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
The molecule that will have dipole moment is:...
4-Yr B.Sc
Q.50
MCQ
0.5M
Chemistry • Physical, Organic & Inorganic Chemistry (HAU PYQ)
Of the five isomeric hexanes, the isomer which can give two monochlorinated compound is:...
4-Yr B.Sc
Q.51
MCQ
0.5M
Chemistry • Physical Chemistry - Electrochemistry
How much electricity in Coulombs (or Faradays) is required for the reduction of 1 mole of Al³⁺ to Al?...
4-Yr B.Sc
Q.52
MCQ
0.5M
Chemistry • Inorganic - d-Block Elements
Which transition metal ion is colorless in aqueous solution due to completely empty (d⁰) or completely filled ...
4-Yr B.Sc
Q.53
MCQ
0.5M
Chemistry • Organic - Named Reactions
Phenol reacts with chloroform in the presence of aqueous sodium hydroxide to introduce an aldehyde group (-CHO...
4-Yr B.Sc
Q.54
MCQ
0.5M
Chemistry • Organic - Biomolecules
Which vitamin deficiency causes the bleeding of gums and scurvy?...