Question 1:

The solubility product of a binary weak electrolyte is  4×10⁻¹⁰ at 298K. Its solubility in mol dm⁻³ at the same temperature is 

1) 4 × 10⁻⁵
2) 2 × 10⁻⁵
3) 8 × 10⁻⁵
4) 16 ×10⁻⁵

Question 2:

In a cubic packed structure of mixed oxides, the lattice is made up of oxide ions, one fifth of tetrahedral voids are occupied by divalent (X⁻) ions, while one-half of the octahedral voids are occupied by trivalent ions (Y⁺³), then the formula of the oxide is:

1) XY₂O₄
2) X₂YO_4???????
3) X₄Y₅O₁₀
4) X₅Y₄O₁₀

Question 3:

 Consider the following reaction,

Product Z is:

1) CH₂=CH₂
2) CH₃CH₂−O−CH₂−CH
3) CH₃CH₂−OSO₃H
4) CH₃CH₂OH

Question 4:

Conversion of CH4 to CH3Cl is an example of ______ reaction .

 1) nucleophilic substitution
2) electrophilic substitution
3) Free radical addition
4) Free radical substitution.

Question 5:

Which of the following is not an antidepressants?

1) Iproniazid
2) Phenelzine
3) Salvarsan
4) Nardil

Question 6:

Among the following the compound that decolourises alkaline kMnO4 is

 1. C₈H₈
 2. C₂H₄
 3. CH₄
 4. CCl₄

Question 7:

Refrigeration helps in food preservation by

1)  greatly reducing the rates by biochemical reaction

2)  sealing the food with a layer of ice

3)  destroying enzyme action

4)  killing the germs

Question 8:

Which process of purification is represented by the following scheme?
$$\underset { impure }{ Ti } +2{ I }_{ 2 }\xrightarrow [  ]{ { 250 }^{ o }C } Ti{ I }_{ 4 }\xrightarrow [  ]{ { 1400 }^{ o }C } \underset { Pure }{ Ti } +2{ I }_{ 2 }$$
1) Cupellation
2) Zone refining
3) Van-Arkel process
4) Poling

Question 9:

If 9 gm H₂O is electrolysed completely with the current of 50% efficiency then?

1) 96500 charge is required
2) 2×96500 C charge is required
3) 5.6 L of O₂ at STP will be formed
4) 11.2 L of O₂ at STP will be formed

Question 10:

Which of them form complex bond with H2S in the enzymes in blood?

1) Iron

2) Cobalt

3) Haemoglobin

4) None of above

Question 11:

In an octahedral crystal field splitting, the number of orbitals pushed down in energy is 

1) 3
2) 2
3) 5
4) 0

Question 12:

 Which of the following is called calomel?

1)  Hg(NO₃)₂

2)  HgCl₂

3)  Hg₂Cl₂

4)  HgSO₄

Question 13:

If  greater the number the double bonds in the carotenoid dyes is more :

1) The more water soluble it is.
2) The more non-water insoluble it is.
3) The more intense or darker the pigment will be.
4) The weaker the dye color will be.

Question 14:

CO₂? is isostructural with:

1) HgCl_2?
2) H_2? ?O
3) SnCl_2?
4) NO₂?

Question 15:

6×10²⁰ molecules of CO₂ are removed from 220 milligram of CO₂. What are the remaining moles of CO₂?

1) 4×10⁻³ moles
2) 5×10⁻³ moles
3) 2×10⁻³ moles
4) 6×10⁻³ moles

Question 16:

In the complexes [Fe(H₂O)₆]³⁺, [Fe(CN)₆]^3- , [Fe(C₂O₄)₃]^3-and [FeCl₆]^3-, more stability is shown by

1) [Fe(H₂O)₆]³⁺
2) [Fe(CN)₆]^3-
3) [FeCl₆]^3-
4) [Fe(C₂O₄)₃]^3-

Question 17:

5 ml of 1N HCl, 20 ml of $$\dfrac{N}{2}$$ $$H_2SO_4$$ and $$30$$ ml of $$\dfrac{N}{3}$$ $$HNO_3$$ are mixed together and the volume is made to $$1$$ L. The normality of the resulting solution is :

1) $$\dfrac{N}{5}$$
2) $$\dfrac{N}{10}$$
3) $$\dfrac{N}{20}$$
4) $$\dfrac{N}{40}$$

Question 18:

Phosphorous occurs as

 1. phosphide.
 2. phosphate.
 3. oxides
 4. element (free state).

Question 19:

Hyperol is an addition product of H₂?O₂? with :

1) ethanol.
2) urea.
3) ethylene.
4) ammonia.

Question 20:

At a particular temperature, the ratio of molar conductance to specific conductance of 0.01 M NaCl solution is:

1) 10⁵ cm³mol⁻¹
2) 10³ cm³mol⁻¹
3) 10 cm³mol⁻¹
4) 10⁵ cm²mol⁻¹

Question 21:

 Using anhydrous AlCl₃ as catalyst, which one of the following reaction produces ethylbenzene (PhEt)?

1) H₂C=CH₂+C₆H₆
2) H₃C−CH3+C₆H₆
3) H₃C−CH₂OH+C₆H₆
4) CH₃−CH=CH₂+C₆H₆

Question 22:

H₂O₂ acts as an oxidising agent in:

1) neutral medium
2) acidic medium
3) alkaline medium
4) acidic as well as alkaline medium

Question 23:

Greyish white metal which is a good conductor of electricity and heat and has a boiling point of 920^?C is :

1) aluminium
2) tin
3) iron
4) zinc

Question 24:

Ethyl alcohol gives ethyl chloride with the help of

1)  KCl

2)  Cl₂

3)  SOCl₂

4)  NaCl

Question 25:

Passage of three faradays of charge through an aqueous solution of AgNO₃, CuSO₄, Al(NO₃ )₃ and NaClwill deposit metals at the cathode in the molar ratio of:

1) 1:2:3:1
2) 6:3:2:6
3) 6:3:0:0
4) 3:2:1:0

Question 26:

Eutrophication causes reduction in:
A) Nutrients
B) Dissolved salts
C) Dissolved oxygen

1) A

2) B & C

3) C

4) A, B & C

Question 27:

How many electrons can exist in all the atomic orbitals that correspond to the principal quantum number 4?

1. 2
2. 8
3. 18
4. 32

Question 28:

The ratio of weights of hydrogen and magnesium deposited by the same amount of electricity from aqueous H₂SO₄ and fused MgSO₄ are:

1) 1:8
2) 1:12
3) 1:16
4) 1:1

Question 29:

Which of the following reagents would distinguish cis-cyclopenta−1, 2−diol from the trans-isomer?

1) Acetone
2) Ozone
3) MnO₂
4) Aluminium isopropoxide

Question 30:

Which of the following cannot reduce the acidified solution of permanganate?

1)  Fe²⁺ ions

2)  Nascent hydrogen

3)  H₂

4)  (COOH)₂

Question 31:

Consider the following successive ionization energies in kJ/molkJ/mol:
IE1=580,IE2=1815,IE3=2740,IE4=11,600 and IE5=14,842
Which element could have this successive ionization energy data?

1) Na 
2) Mg
3) Al
4) Si

Question 32:

Set of d-orbitals which is used by central metal during formation of MnO⁴⁻

1) $$d_{x^2-y^2}, d_{z^2}, d_{xy}$$
2) $$d_{xy}, d_{yz}, d_{xz}$$
3) $$d_{x^2-y^2}, d_{xy}, d_{xz}$$
4) $$d_{x^2-y^2}, d_{z^2}, d_{xz}$$

Question 33:

Which of the following fertilizers does not replenish nitrogen in the soil? :

1) CAN
2) Urea
3) Super phosphate lime.
4) Ammonium phosphate

Question 34:

The correct order of decreasing ionic radius among the following anions would be:

1) Se²⁻,I⁻,Br⁻,F⁻,O²⁻
2) F⁻.Br⁻,O²⁻,Se²⁻,I⁻
3) I⁻,Se²⁻,Br−,O²⁻,F⁻
4) F⁻,O²⁻,Br−,Se²⁻,I⁻

Question 35:

At equilibrium 500ml500ml vessel contains 1.5M of each A,B,C,D if 0.5N if C and D expelled out than what would be the Kc ?

1) 1
2) 1/9
3) 4/9
4) 5/9

Question 36:

$$NO_2$$ required for a reaction is produced by the decomposition of $$N_2O_5$$ in $$CCl_4$$ as per the equation
$$2N_2O_5(g) \rightarrow 4NO_2(g)+O_2(g)$$.
The initial concentration of $$N_2O_5$$ is $$3.00\, mol\, L^{-1}$$ and it is $$2.75\, mol\, L^{-1}$$ after $$30$$ minute. The rate of formation of $$NO_2$$ is :
1) $$2.083\times 10^{-3}\, mol\, L^{-1} min\, ^{-1}$$
2) $$4.167\times 10^{-3}\, mol\, L^{-1} min\, ^{-1}$$
3) $$8.333\times 10^{-3}\, mol\, L^{-1} min\, ^{-1}$$
4) $$1.667\times 10^{-2}\, mol\, L^{-1} min\, ^{-1}$$

Question 37:

The IUPAC name of


1) 5−Oxo−4−hydroxy−2−pentanone
2) 4−Hydroxy−5−al−2−Pentanone
3) 2−Hydroxy−4−Oxopentanal
4) 1−Al−4−Oxo−2−Pentanol

Question 38:

In which of the following compounds boron atoms are in sp² and sp³ hybridisation states?

1) Borax
2) Diborane
3) Borazole
4) All of the above

Question 39:

The final product of the oxidation of ethyl alcohol is :

1) Acetic acid
2) Ethane
3) Acetaldehyde
4) Acetone.

Question 40:

the position of both, electron and helium atom is known with in 0.1nm. Further the momentum of electron is known with in 5.0×10^-26 kg ms^-1The minimum uncertainty in the measurement of momentum of helium atom is

1) 50 kgms^-1
2) 5.0 ×10^-26 kgms^-1
3) 80 kg m s-1
4) 80.0 ×10^-26 kgms^-1

Question 41:

Correct energy value order is

1) ns, np, nd, (n-1)f
2) ns, np, (n-1)d, (n-2)f
3)ns, np, (n-1)d, (n-1)f
4)ns, (n-1)d, np, (n-2)f

Question 42:

An aqueous solution of 6.3g of oxalic acid dehydrate is made up to 250ml. The volume of 0.1 N NaOH required to completely neutralise 10ml of this solution is

1) 40 ml
2) 20 ml
3) 10 ml
4) 4 ml

Question 43:

Suppose two elements X and Y combine to form two compounds XY2? and X3?Y2?. 0.1 mol of former weighs 10 g while 0.05 mol of the latter weighs 9 g. The atomic masses of X and Y are, respectively:

1) 60 and 40
2) 30 and 40
3) 40 and 30
4) 40 and 60

Question 44:

Which one of the following chars when warmed with concentrated sulphuric acid

1. hydrocarbon 
2. carbohydrate 
3. protein 
4. fat

Question 45:

Which bond angle around X would result in the maximum dipole moment for the triatomic molecule XY₂?

1)  q = 120^o

2)  q = 150^o

3)  q = 90^o

4)  q = 180^o