Question 1:

CsBr crystallizes in a body-centred cubic lattice of unit cell edge length 436.6 pm. Atomic masses of Cs and Br are 133 amu and 80 amu respectively. The density (in g cm⁻³) of CsBr is

1) 8.50
2) 4.25
3) 42.5
4) 0.425

Question 2:

The decrease in stability of higher oxidation states in p-block with increasing atomic number is due to :

1) increase in bond energy on going down the group
2) the reluctance of electrons of s-sub shell to participate in chemical bonding?
3) poor screening effect of d-orbitals  
4) none

Question 3:

3g of activated charcoal was added to 50 mL of acetic acid solution (0.06N) in a flask. After a hour it was filtered and the strength of the filtrate was found to be 0.042 N. The amount of acetic acid absorbed (per gram of charcoal) is:

1) 36mg
2) 42mg
3) 54mg
4) 18mg

Question 4:

2,3 -dimethyl - 2- butene can be prepared by heating which of the following compounds with a strong acid?

1) (CH₃)₂CH-CH(CH)₃-CH=CH₂
2) (CH₃)₃C-CH=CH₂
3) (CH₃)₂C =CH-CH₂-CH₃
4) (CH₃)₂CH-CH₂-CH=CH₂

Question 5:

Phosphoric acid is commonly supplied as an 85% solution. What mass of this solution would be required to prepare 600.0 mL of a 2.80 M phosphoric acid solution?

1) 104 g
2) 280 g
3) 194 g
4) none

Question 6:

Which of the following metal is purified by Mond carbonyl method ?

1) Ti
2) Ge
3) Zr
4) Ni

Question 7:

In S_N?2 reactions, the correct order of reactivity for the following compounds
  CH₃?Cl, CH₃?CH_2??Cl, (CH₃)_2?CHCl and  (CH₃?)₃?CCl is:

1 CH₃?CH2?Cl > CH₃?Cl > (CH₃?)_2?HCl > (CH₃?)₃CCl
2) CH₃?Cl > CH₃?CH2?Cl > (CH₃)_2?CHCl > (CH₃)₃CCl
3) CH₃?Cl > (CH₃)_2??CHCl > CH₃CH_2??Cl > (CH₃?)₃CCl
4) (CH₃?)_2?CHCl > CH₃CH2?Cl>CH₃Cl > (CH₃)₃?CCl

Question 8:

Among the following, which are ambidentate ligands?
(i) SCN⁻
(ii) $$NO^-_3$$
(iii) $$NO^-_2$$
(iv) $$C_2O^{2-}_4$$

1) (i) and (iii)
2) (i) and (iv)
3) (ii) and (iii)
4) (ii) and (iv)

Question 9:

In adding dilute HCl to copper oxide powder, the solution formed is blue-green. On the basis of reaction, what should be the nature of copper oxide?

1) Basic
2) Acidic
3) Neutral
4) Amphoteric

Question 10:

At a certain temperature, the first order rate constant k₁ is found to be smaller than the second order rate constant k. If E_a(1) of the first order reaction is greater than E_a(2) of the second order reaction, then as temperature is raised :

1) k2 will increase faster than k1.
2) k1 will increase faster than k2 but will always remain less than k2.
3) k1 will increase faster than k2 and become equal to k2
4) k1 will increase faster than k2 and become greater than k2

Question 11:

A certain sample of cuprous sulphide is found to have composition Cu_1.8S, because of incorporation of Cu²⁺ ions in the lattice. What is the mole %of Cu²⁺ in total copper content in this crystal?

1) 99.8%
2) 11.11%
3) 88.88%
4) None

Question 12:

Which of the following is not an ingredient of clinker cement?

1) Calcium silicate
2) Aluminium silicate
3) Calcium aluminium silicate
4) Gypsum

Question 13:

In the silver plating of copper , K[Ag(CN)₂] is used instead of AgNO₃. the reason is

1) A thin layer of Ag is formed on Cu
2) More voltage is required
3) Ag+ ions are completely removed from solution
4) Less availability of Ag⁺ ions, as Cu cannot displace Ag from [Ag(CN)₂]^- ion

Question 14:

Anhydrous FeSO4 is

1)  brown

2)  green

3)  white

4)  black

Question 15:

Which of the following ion has largest size?

1) F− 
2) Al³⁺
3) Cs⁺
4) O²⁻

Question 16:

Consider the coordination compound, [Co(NH₃)₆]Cl₃. In the formation of this complex, the species which acts as the Lewis base is:

1) Cl⁻
2) Co³⁺
3) NH₃
4) [Co(NH₃)₆]³⁺

Question 17:

Ammonia and oxygen reacts at higher temperature as:

1) $$r=\dfrac{1}{4}\dfrac{d[NO]}{dt}=10\times10^{-4}$$ mol litre$$^{-1}$$ sec$$^{-1}$$
2) $$r=\dfrac{1}{4}\dfrac{d[NO]}{dt}=9\times10^{-4}$$ mol litre$$^{-1}$$sec$$^{-1}$$
3) $$r=\dfrac{1}{4}\dfrac{d[NO]}{dt}=13\times10^{-4}$$ mol litre$$^{-1}$$sec$$^{-1}$$
4) $$r=\dfrac{1}{4}\dfrac{d[NO]}{dt}=20\times10^{-4}$$ mol litre$$^{-1}$$sec$$^{-1}$$

Question 18:

 Marsh test is used for

1)  arsenic

2)  potassium

3)  barium

4)  aluminium

Question 19:

Identify the correct order of boiling points of the following compounds having nearly same molecular weight.

1) I > II > III > IV

2) IV > III > II > I

3) III > IV > II > I

4) IV > II > III > I

Question 20:

An organic compound, C₃H₆O does not give a precipitate with 2, 4 dinitrophenyl-hydrazine reagent and does not react with metallic sodium. It could be

1) CH₃ –CH₂ –CHO
2) CH₂ =CH–CH₂OH 
3) CH₃ –CO–CH₃ 
4) CH₂ =CH–O–CH₃

Question 21:

On reaction of chlorobenzene with acetyl chloride in presence of anhydrous AICl₃, the major product formed is:

Question 22:

The total number of σ and π bonds present in azobenzene are:

1) 24σ, 6π

2) 25σ, 7π

3) 28σ, 6π

4) 27σ, 6π

Question 23:

Number of identical Cr-O bonds in dichromate ion Cr₂O₇²⁻ is :

1) 4
2) 6
3) 7
4) 8

Question 24:

The adsorption of a gas, on a solid surface, varies with pressure of the gas in which of the following manner?

1) Slow fast independent of the pressure
2) Fast slow independent of the pressure
3) Independent of the pressure slow fast
4) Independent of the pressure fast slow

Question 25:

The organic chloro compound, which shows complete stereochemical inversion during an S_N 2 reaction is

1) (C₂H5)₂ CHCl 
2) (CH₃)₃ CCl
3) (CH₃)₂CHCl
4) CH₃Cl

Question 26:

The number of atoms in 100 g of a fcc crystal with density of 10.0 g cm⁻³ and cell edge equal to 200 pm is equal to :

1) 5 × 10²⁴
2) 5 × 10²⁵
3) 6 × 10²³
4) 2 × 10²⁵

Question 27:

How much amount of CuSO₄.5H₂O required for liberation of 2.54g I₂ when titrated with KI?

1) 2.5 gm
2) 4.99 gm
3) 2.4 gm
4) 1.2 gm

Question 28:

A colourless salt colours a bunsen flame as golden yellow, and, also turns moistened litmus paper into blue colour. The substance is:

1) Na₂CO₃
2) NaCl
3) Cu(OH)₂
4) K₂CO₃

Question 29:

The correct sequence of decrease in the bond angle of the following hydrides

1) NH₃ > PH₃ >AsH₃ > SbH₃
2) NH₃ > AsH₃ > PH₃ >SbHv
3) SbH₃ > AsH₃ > PH₃ > NH₃
4) PH₃ > NH₃ >AsH₃ >SbH₃

Question 30:

Which of the following can be used as adsorbent in adsorption chromatography?

1) Silica

2) Alumina

3) Cellulose

4) All of these

Question 31:

In the reaction with HCl, an alkene reacts in accordance with the markownikoff's rule, to give a product 1-chloro -1- methylcyclohexane. The possible alkane is 

Question 32:

Which of the following statements is not correct for a nucleophile

1) Nucleophiles attack low e- density sites
2) Nucleophiles are not electron seeking
3) Nucleophile is a Lewis acid
4) Ammonia is a nucleophile

Question 33:

What willl be the mass of oxygen liberated by decomposition of 200 mL hydrogen peroxide solution with a strength of 34 g per litre? 

1) 25.5g
2) 3.0g?
3) 3.2g
4) 4.2g

Question 34:

The value of observed and calculate molecular weights of silver nitrate are 92.64 and 170 respectively. The degree of dissociation of silver nitrate will be :

1) 60%
2) 83.5%
3) 85.3%
4) 41.6%

Question 35:

When ZnS and PbS minerals are present together, then NaCN is added to separate them in the froth flotation process as a depressant, because:

1) $$Pb(CN)_2 \,S$$ precipitated while no effect on $$ZnS$$
2) $$ZnS$$ forms soluble complex $$Na_2 [Zn(CN)_4]$$
3) $$PbS$$ forms soluble complex $$Na_2[Pb(CN)_4]$$
4) they cannot be separated by adding $$NaCN$$

Question 36:

Which of the following has the highest freezing point of equimolal aqueous solutions

1) C₆H₅NH₃Cl (aniline hydrochloride)
2) C₆H₁₂O₆ (glucose)
3) La(NO₃)₃
4) Ca(NO₃)2

Question 37:

On increasing temperature from 200K to 220K, rate constant of reaction A increases by 3 times and rate constant of reaction B increases by 9 times then correct relationship between activation energy of A and B is:

1) E_A=3_EB
2) 3E_A=E_B
3) E_B=2E_A
4) E_A=2E_B

Question 38:

The standard reduction potential for two reaction are given below
AgCl(s) + e^- → Ag(s) + Cl^-(aq), E°=0.22V
Ag+(aq) + e^- → Ag(s) , E°=0.80V
the solubility product of AgCl under standard condition of temperature (298K) is given by

1) 1.6 ×10^-10
2) 1.5 ×10^-10
3) 3.2 ×10^-8
4) 3.2 ×10^-10

Question 39:

$$[Cr(H_2O)_6]Cl_3$$ (At. no. of cr = 24) has moment of 3.83 B.M. The correct distribution of 3d electrons in the chromium present in the complex is:
1) $$3d^1_{xy},3d^1_{yz},3d^1_{zx}$$
2) $$3d^1_{xy},3d^1_{yz},3d^1_{z^2}$$
3) $$3d^1_{(x^2-y^2)},3d^1_{z^2},3d^1_{xz}$$
4) $$3d^1_{xz},3d^1_{(x^2-y^2)},3d^1_{yz}$$

Question 40:

Metal halide which is insoluble in water

 1. AgF
 2. AgI
 3. CaCl₂
 4. kBr

Question 41:

Turuball's blue is

1.  Fe₄ [Fe (CN)₆ ]₃
2.  Fe₄ [Fe (CN)₆ ]
3.  Fe₂ [Fe (CN)₆ ]₃
4.  Fe₃ [Fe (CN)₆ ]₂ 
 

Question 42:

The first ionization potential of four consecutive elements in the second period of the periodic table are 8.3, 11.3, 14.5 and 13.6 eV respectively. Which one of the following is the first ionization potential of carbon?

1) 13.6 
2) 11.3
3) 8.3
4) 14.5

Question 43:

The hardness of water is estimated by

1)  distillation method

2)  titrimetric method

3)  EDTA method

4)  conductivity method

Question 44:

Which of the following hormones contains iodine?

1) Insulin

2) Testosterone

3) Adrenaline

4) Thyroxine

Question 45:

A synthetic material used for washing clothes, even when water is hard is:

1) detergent

2) soap

3) shampoo

4) facewash

Question 46:

Identify the least stable ion amongst the following :

1) Li⁻
2) Be⁻
3) B⁻
4) C⁻