# When the copper wire is dipped into silver nitrate solution, the solution gradually becomes blue. The reason for this is

1.  oxidation of silver

2.  reduction of copper

3.  oxidation of copper

4.  oxidation of nitrate ion

4

oxidation of copper<br>

Explanation :
No Explanation available for this question

# The heats of dissociation (kcal/mol) of methane and ethane are 360 and 620 respectively. From these the C-C bond energy in ethane can be evaluated as

1.  260

2.  130

3.  80

4.  200

4

80<br>

Explanation :
No Explanation available for this question

# H2+I2⇌2HI. In this reaction

1.  Kp ≠Kc

2.  Kp =Kc

3.  Kp >Kc

4.  Kp <Kc

4

K<sub>p</sub> =K<sub>c</sub>

Explanation :
No Explanation available for this question

# N2+3H2⇌2NH3+21.8 k cal . The effect of increase in pressure

1.  increases the rate of forward reaction

2.  increases the rate of backward reaction

3.  produces no change in the reaction

4.  results in an increase in the volume

4

increases the rate of forward reaction<br>

Explanation :
No Explanation available for this question

# 75% of a first order reaction was completed in 32 min. 50%of the reaction would have been completed in

1.  24min

2.  16min

3.  18min

4.  22min

4

16min

Explanation :
No Explanation available for this question

# Given that 2C(s) + 2O2(g)→2CO2 (g); ΔH = -787 kJ H2(g)+1/2 O2(g)→H2O (l); ΔH = -286 kJ C2H2(g)+ 2 ½ O2(g)→2CO2(g)+ H2O(l); ΔH = -1301 kJ Heat of formation of acetylene is

1.  -1802 kJ

2.  +1802 kJ

3.  -1800 kJ

4.  +228 kJ

4

+228 kJ

Explanation :
No Explanation available for this question

# lodoform test is not answered by

1.  C6H5CHOHCH3

2.  C6H5CHOHC2H5

3.  CH3CHOHCH3

4.  CH3CHOHCH2C6H5

4

C<sub>6</sub>H<sub>5</sub>CHOHC<sub>2</sub>H<sub>5</sub><br> <sub></sub>

Explanation :
No Explanation available for this question

# Phenyl is isocyanide test is used to identify

1.  aromatic secondary amines

2.  aromatic tertiary amines

3.  aromatic primary amines

4.  quaternary ammonium compounds

4

aromatic primary amines<br>

Explanation :
No Explanation available for this question

# Acetylene on reaction with hypochlorous acid gives

1.  acetone

2.  chloroacetone

3.  chloroacetaldehyde

4.  dichloroacetaldehyde

4

dichloroacetaldehyde

Explanation :
No Explanation available for this question

# Action of bleaching powder on ethyl alcohol gives

1.  chloroform

2.  dichloromethane

3.  trichloroethane

4.  ethylene chloride

4