For alkali metals, which one of the following trends is incorrect
For alkali metals, which one of the following trends is incorrect
Options
(a) Hydration energy: Li > Na > K > Rb (b) Ionization energy: Li > Na > K > Rb (c) […]
KA2010
A dibromo derivative of an alkane reacts with sodium metal to form an alicyclic
A dibromo derivative of an alkane reacts with sodium metal to form an alicyclic hydrocarbon. the derivative is
Options
(a) 1,1-dibromopropane (b) 2,2-dibromobutane (c) 1,2-dibromoethane (d) 1,4-dibromobutane
Correct Answer:
1,4-dibromobutane
Explanation:
No explanation […]
The letter ‘D’ in D-glucose signifies
The letter ‘D’ in D-glucose signifies
Options
(a) configuration at all chiral carbons (b) dextrorotatory (c) that it is a monosaccharide (d) configuration at a particular chiral carbon
Correct Answer:
configuration at a […]
Reaction of methyl bromide with aqueous sodium hydroxide involves
Reaction of methyl bromide with aqueous sodium hydroxide involves
Options
(a) racemisation (b) SN1 mechanism (c) inversion of configuration (d) SN2 mechanism
Correct Answer:
inversion of configuration
Explanation:
No explanation available. Be the […]
In Kjeldahl’s method,ammonia from 5g of food neutralizes 30 cm3 of 0.1 N acid.
In Kjeldahl’s method,ammonia from 5g of food neutralizes 30 cm³ of 0.1 N acid.The percentage of nitrogen in the food is
Options
(a) 0.84 (b) 8.4 (c) 16.8 (d) 1.68
Correct Answer:
0.84
Which of the following is wrongly matched
Which of the following is wrongly matched
Options
(a) [Cu(NH₃)₄]²⁺ – square planar (b) [Ni(CO)₄] – neutral ligand (c) [Fe(CN)₆³⁻ – sp³d² (d) [Co(en)₃]³⁺ – follows EAN rule
Correct Answer:
[Fe(CN)₆³⁻ – sp³d²
In the electrolytic refining of zinc
In the electrolytic refining of zinc
Options
(a) graphite is at the anode (b) the impure metals is at the cathode (c) the metal ion gets reduced at the anode (d) acidified zinc […]
Negative deviation from Raoult’s law is observed in which one of the
Negative deviation from Raoult’s law is observed in which one of the following binary liquid mixtures
Options
(a) Ethanol and acetone (b) Benzene and toluene (c) Acetone and chloroform (d) Chloroethane and bromoethane
Which one of the following is a molecular crystal
Which one of the following is a molecular crystal
Options
(a) Rock salt (b) Quartz (c) Dry ice (d) Diamond
Correct Answer:
Dry ice
Explanation:
No explanation available. Be the first […]
The standard emf of galvanic cell involving 3 moles of electrons in its redox
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the reaction of the cell is
Options
(a) 10²⁵ (b) 10²° […]