Chemistry

Question 1

Ketone + HCN

Answer 1

Cyanohydrin

Question 2

CN + LiAlH4

Answer 2

CH2-NH2

Question 3

Bond angle order of group 15 hydrides

Answer 3

NH3 > PH3 > AsH3 > SbH3

Question 4

Melting point order of group 15 hydrides

Answer 4

NH3 > SbH3 > AsH3 > PH3

Question 5

Boiling point order of group 15 hydrides

Answer 5

SbH3 > NH3 > AsH3 > PH3

Question 6

Z-H bond length of group 15 elements

Answer 6

Sb-H > As-H > P-H > N-H

Question 7

Thermal stability order of group 2 carbonates

Answer 7

BeCO3 < MgCO3 < CaCO3 < SrCO3

Question 8

Thermal stability order of group 2 hydroxides

Answer 8

Be(OH)2 < Mg(OH)2 < Ca(OH)2 < Sr(OH)2

Question 9

Thermal stability order of group 2 sulfates

Answer 9

BeSO4 < MgSO4 < CaSO4 < SrSO4

Question 10

Thermal stability order of group 2 oxides

Answer 10

MgO > CaO > SrO > BaO

Question 11

XeF2 + H20 —–>

Answer 11

Does not undergo disproportionation [Xe + 2HF + 1/2O2]

Question 12

2MNO3 + Heat (M=Na, K, Rb, Cs) ——->

Answer 12

2MNO2 + O2

Question 13

2M(NO3)2 + Heat (M=Be, Mg, Ca, Sr, Ba) ———–>

Answer 13

2MO + 2NO2 + O2

Question 14

Number of geometrical isomers possible for [Ma2b2c2] type of complex

Answer 14

5 geometrical isomers

Question 15

The reductive ozonolysis of natural rubber will finally form

Answer 15

4-Oxopentanal

Question 16

X-X bond enthalpy of halogens

Answer 16

Cl2 > Br2 > F2 > I2

Question 17

Boiling point order of halogens

Answer 17

I2 > Br2 > Cl2 > F2

Question 18

Extent of hydration of halogen ions

Answer 18

F– > Cl– > Br– > I–

Question 19

X-X bond length order of halogens

Answer 19

I2 > Br2 > Cl2 > F2

Question 20

Cheilosis is caused due to

Answer 20

Vitamin B12 deficiency

Question 21

For salt of weak acid and weak base

Answer 21

pH = 1/2[pKw + pKa - pKb]

Question 22

Oxidation state of Cr in CrO5 is

Answer 22

+6