Hydrogen bonding is maximum in
The energy of a hydrogen atom in its ground state is -13.6eV. The energy of the level corresponding to the energy level equal to 5 is
The organic compound which will answer the Fehling solution test is
Which of the following is not a nucleophile?
The most stable free radical among the following is
The number of electrons in the M shell of the element with atomic number 24 is
In graphite, the electrons are
Amino acids are produced by the hydrolysis of
The enzyme which hydrolyses triglycerides to fatty acids and glycerol, is called
Which of the following is a polar compound?
A is a higher phenol and B is an aromatic carboxylic acid. Separation of a mixture of A and B can be carried out easily by having a solution
The law of mass action was given by
Which relation is correct ?
t1/4 can be taken as the time taken for the concentration of a reactant to drop to (3/4) of its initial value. If the rate constant for a first order reaction is K, the t1/4 can be written as
The heat of combustion of methane at 298K is expressed by
C H 4 g + 2 O 2 g → C O 2 g + 2 H 2 O l , Δ H = − 890.2 k J . The magnitude of Δ E of the reaction at this temperature is
The name of the element with atomic number 100 was adopted in honour of
Fermium (symbol Fm and atomic number 100) was named for the American physicist Enrico Fermi. It is a synthetic, radioactive, metallic transuranic element of the actinide series.
Which one of the following is an inner orbital complex as well as diamagnetic in behaviour?
(Atomic numbers : Zn = 30, Cr = 24, Co = 27, Ni = 28)
Which of the following compounds is aspirin?
Which of the following factors may be regarded as the main cause of lanthanide contraction?
How many moles of acidified FeSO₄ solution can be completely oxidised by one mole of KMnO₄?
The oxidation no. of nitrogen in NaNO₂ is
The formal oxidation state of the nitrogen atom in a nitrite is +3. This means that it is can be either oxidised to oxidation states +4 and +5 or reduced to oxidation states as low as -3.
A σ - bond is
Which one of the following will undergo meta-substitution on monochlorination ?
Iodoethane reacts with sodium in the presence of dry ether. The main product is
Nascent hydrogen consists of
The pH of gastric juice is normally
The stereoisomers which are neither superimposable nor mirror-image are called
Which among MeX, RCH₂X, R₂CHX, R₃CX is most reactive towards SN2 reaction?
Wood charcoal is used to decolourise sugar because it
A deep brown gas is formed by mixing two colourless gases which are
The correct order of increasing stability is
Which one is metaboric acid?
The polymer which has amide linkage is
Which of the following does not illustrate the anomalous properties of Li?
Which of the following carbonates decomposes readily at low temperatures?
From a salt solution of Cu, 0.534 g of Mg displaces 1.415 g of Cu. If equivalent weight of Mg is 12, then equivalent weight of Cu will be
Volume of 0.1 M K₂Cr₂O₇ required to oxidise 35 ml of 0.5 M FeSO₄ solution is
The volume of 2.8g of carbon monoxide at 27oC and 0.821 atm pressure is (R = 0.0821 lit atm mol⁻1K⁻1)
A liquid is found to scatter a beam of light but leaves no residue when passed through the filter paper. The liquid can be described as a/an