# 250 ml of a solution contains 6.3g of oxalic acid (mol. wt = 126). What is the volume (in liters) of water to be added to this solution to make it a 0.1 solution

1.  750

2.  7.5

3.  0.075

4.  0.75

4

0.75

Explanation :
No Explanation available for this question

# The standard reduction potentials of Ag, Cu, Co and Zn are 0.799, 0.337, -0.277 and -0.762 V respectively. Which of the following cells will have maximum cell e.m.f.

1.  Zn | Zn2+ (IM) || Cu2+ (IM) | Cu

2.  Zn | Zn2+ (lM) || Ag+ (IM) | Ag

3.  Cu | Cu2+ (IM) || Ag+ (lM) | Ag

4.  Zn | Zn2+ (lM) || Co2+ (IM) | Co

4

Zn | Zn<sup>2+</sup> (lM) || Ag<sup>+</sup> (IM) | Ag

Explanation :
No Explanation available for this question

# What is the wave-length of Hβ line in the Blamer series of hydrogen spectrum(R= Rydberg constant)

1.  36/5R

2.  5R/36

3.  3R/16

4.  16/3R

4

16/3R

Explanation :
No Explanation available for this question

# Which of the following relation is correct for a first order reaction (k = rate constant, r = rate of reaction, c = conc.of reactant)

1.  k = r x c2

2.  k = r x c

3.  k = c / r

4.  k = r / c

4

k = r / c

Explanation :
No Explanation available for this question

# Which of the following is the correct order of ionic radii

1.  Na+ < Mg2+ < Al3+ < Si4+

2.  Al3+ < Si4+ > Na+ >Mg2+

3.  Si4+ < Al3+ >Mg2+ > Na+

4.  Na+ > Mg2+ >Al3+ > Si4+

4

Na+ &gt; Mg<sup>2+</sup> &gt;Al<sup>3+</sup> &gt; Si<sup>4+</sup>

Explanation :
No Explanation available for this question

# Which of the following is used to convert nitro benzene to azobenzene

1.  Zn/NH4Cl

2.  Zn/NaOH

3.  Sn/HCl

4.  LiAlH4

4

LiAlH<sub>4</sub>

Explanation :
No Explanation available for this question

# Which of the following has the highest electro negativity

1.  Sn

2.  Cl

3.  K

4.  B

4

Cl

Explanation :
No Explanation available for this question

# Which of the following has least bond energy

1.  F2

2.  H2O

3.  N2

4.  O2

4

F<sub>2</sub>

Explanation :
No Explanation available for this question

# Which one of the following represents the reaction between fluorine and cold dilute NaOH

1.  2F2  + 4NaOH → 4NaF + 2H2O

2.  3F2  + NaOH → 5NaF + NaFO3

3.  F2  + 2NaOH → NaF + NaOF + H2O

4.  2F2  + 2NaOH → 2NaF + OF2 + H2O

4

2F<sub>2</sub>&nbsp; + 2NaOH &#8594; 2NaF + OF<sub>2</sub> + H<sub>2</sub>O

Explanation :
No Explanation available for this question

# Which of the following can be detected by silver mirror test

1.  CH3COCH3

2.  CH3COOH

3.  C2H6

4.  CH3CHO

4

CH<sub>3</sub>CHO

Explanation :
No Explanation available for this question

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