In which of the following reactions ethylene is formed?
Ethylene reacts with bromine to form
Which one of the following metals will give blue ash when its salt is heated with Na₂CO₃ solid and Co(NO₃)₂ on a charcoal piece
The energy of the first electron in helium will be
Acetylene reacts with ammonical silver nitrate to form
If the electron of a hydrogen atom is present in the first orbit, the total energy of the electron is
In its reaction with silver nitrate acetylene shows
Which of the following ions has the maximum magnetic moment?
Which of the following does not show electromeric effect?
Among the compounds BF3, NCl3, H2S, SF4 and BeCl2, identify the ones in which the central atom has the same type of hybridisation.
The type of hybridisation of boron in diborane is
When 0.5 g of sulphur is burnt to form sulphur dioxide, 4.6 KJ of heat is evolved. The heat of formation of sulphur dioxide is (Atomic weight of S =32)
2A → B + C would be a zero order reaction when
Under what conditions of temperature and pressure the formation of atomic hydrogen from molecular hydrogen will be favoured
A Carnot engine, whose efficiency is 20% receives heat at 450 K. If its efficiency is increased to 30%, then the intake temperature for the same exhaust temperature is
For a system in equilibrium, ∆G = 0, under conditions of constant
IUPAC name of (CH3)2 CH CH2 CH2 Cl is
An example of anthraquinone dye is
Correct formula of the complex formed in the brown ring test for nitrates is
Which of the following is isoelectronic as well as has the same structure as that of N₂O?
CO2 and N2O are isoelectronic with 22 electrons and isostructural with linear geometry.
Structure of nitrous oxide:
Structure of carbon di-oxide:
A smuggler could not carry gold by chemically depositing iron on the gold surface since
Which one of the following benefication processes is used for the mineral Al₂O₃.2H₂O?
300 ml of a gas at 27oC is cooled to - 3oC at consatnt pressure, the final volume is
A real gas most closely approaches the behaviour of an ideal gas at
Which is true for an element R present in group 13 of the periodic table?
When a substance A reacts with water it produces a combustile gas B and a solution of a substance C in water. When another substance D reacts with this solution of C, it also produces the same gas B even on reaction with same gas B even on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden yellow colour to a smokeless flame of Bunsen burner. A, B, C and D respectively are
The ion that can be precipitated by HCl as well as H₂S is
The percentage of lead in lead pencil is
Which one of the following compounds does not exist?
All the elements of oxygen family are
Consider the following reaction : 6 NaOH + 3 Cl₂ → 5 NaCl + A + 3 H₂O.
What is the oxidation number of chlorine in "A"?
The chemical formula of gypsum is
NH₃ and H₂O form NH₄OH by
When ammonium chloride is added to ammonia solution , the pH of the resulting solution will be
0.1 M solution of which of the substance will behave basic?
The pH of a solution of hydrochloric acid is 4. The molarity of this solution is
Between CH₃COOH and HCOOH, HCOOH will be
Which of the following compounds will exhibit geometrical isomerism?
The substances having identical chemical properties but differ in atomic masses are called
In radioactive delay, which one of the following moves the fastest?
Number of metamers represented by molecular formula C₄H₁₀O is
The pesticide DDT slowly changes to
Calcium acetate on heating results in
Which of the following compound will give brisk effervescences of CO₂ on treatment with NaHCO₃ ?
Most stable alkene is :
In the following, electrophile is:
HO ― NO2
Which of the following will exhibit maximum ionic conductivity?
Phenol is heated with CHCl₃ and alcoholic KOH when salicyladehyde is produced. This reaction is known as
The raw material to form nylon is
In a hydrocarbon, mass ratio of hydrogen and carbon is 1:3, the empirical formula of hydrocarbon is
On reduction KMnO₄ by oxalic acid in acidic medium, the oxidation number of Mn changes. What is the magnitude of this change?
If three electrons are lost by a metal ion M3+, its final oxidation number would be
Which of the following metal oxides is anti-ferromagnetic in nature ?
Normality of 2M sulphuric acid is
Which statement is wrong regarding osmotic (π), Volume (V) and temperature (T)
Which of the following compounds exhibit cis and trans forms?
12 litre of hydrogen and 11.2 litre of chlorine are mixed and exploded. The composition in volume of the mixture will be
Gold number is minimum in case of
Titanium shows magnetic moment of 1.73 B.M. in its compound. What is the oxidation number of titanium in the compound ?
Which is not amphoteric ?