BITSAT Chemistry Test - 2
40 Questions MCQ Test BITSAT Mock Tests Series & Past Year Papers | BITSAT Chemistry Test - 2
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A compound X with molecular formula C₃H₈O can be oxidized to a compound Y with the molecular formula C₃H₆O₂. X is most likely to be a
Which of the following reagents cannot be used to distinguish between hexanal and 2-hexanone?
Elimination of bromine from 2- bromobutane results in the formation of
Predominantly 2-butene will be formed on elimination of bromine from 2- bromobutane. This is due to Saytzeff's rule.
Certain haloalkanes can undergo elimination in two different ways giving a mixture of two products. In such reactions, the preferred product is the more highly substituted alkene (i.e. the alkene having lesser number of hydrogens on the doubly bonded carbon atoms). This generalisation is known as Saytzeff’s rule.
- Every orbital in a sublevel is singly occupied before any orbital is doubly occupied.
- All of the electrons in singly occupied orbitals have the same spin (to maximize total spin).
The volume of water to be added to 100 cm3 of 0.5N H2SO4 to get decinormal concentration is
'The atomic orbitals are progressively filled in the order of increasing energy'. This statement is known as
The order of decreasing stability of the carbanions (CH₃)₃C-(I) ; (CH₃)₂CH-(II) ; CH₃CH₂-(III) ; C₆H₅CH₂-(IV) is
Although due to +I effect of methyl groups, (CH3)2 CHO and (CH3)3 CO are stronger bases but due to steric hindrance both are weaker nucleophiles than CH3O
Further due to resonance, C6H5O
is the weakest nucleophile
CH3O is most reactive (stronger) nucleophile
60 J of heat flows out from 600 g of water at 30oC into surroundings at 25oC.The net entropy change in universe is approximately
Just before attaining equilibrium by a reversible reaction, it is found that
At the initial stage of the reaction, the forward reaction will be much faster. As the reaction progresses, the concentration of A and B will fall while those of C and D will rise, until gradually the inequality between the rates of the opposing reactions cancel out.
At this point, the state of chemical equilibrium have been attained - the reaction will proceed in either direction at exactly the same rate.
Once equilibrium condition has been attained, there is no change in the concentrations of the substances in the reaction mixture because then, products of each reaction (forward and backward) are being used up as fast as they are being formed simultaneously.
N2O is isoelectronic with CO2 and N 3 − , which is the structure of N2O?
For the square planar complex [M(a) (b) (c) (d)] (where M = central metal and a,b,c and d are monodentate ligands), the number of possible geometrical isomers are
Lithium is lightest among all the metals with density 0.534 g/cm3.
Which of the following gas is evolved on heating ammonium dichromate?
For standard reduction potentials of three metals A, B and C are + 0.5 V, -3.0 V and -1.2 v respectively. The reducing powers of these metals are
If the solubility of PbCl₂ at 25oC is 6.3 x 10⁻3 mole/litre, its solubility product at that temperature is
When n-propyl iodide is heated with alcoholic KOH,one of the products is
Treatment of ammonia with excess of ethyl chloride with yield
What are the products formed when ammonia reacts with excess chlorine?
The dihedral angle HCH in staggered conformation of C₂H₆ is
Which of the following types of forces bind together the carbon atoms in diamond?
Amongst elements of Group 15, the property which increases down the Group is
BCl₃ is planar molecule because in this molecule boron is
A burning strip of magnesium is introduced into a jar containing a gas. After some time the walls of the container is coated with carbon. The gas in the container is
Which of the following carbonates decomposes readily at low temperatures?
A sample of O₂ gas collected over water at 23oC at a barometric pressure of 751mm Hg (vapour pressure of water at 23oC is 21mm Hg). The partial pressure of O₂ gas in the sample collected is
NaCl is an electrolyte which dissociates to give ions.
N a C l → N a + + C l −
∴ concentration of ions in the solution = 2 M. Whereas glucose, sucrose and urea are non-electrolytes. Thus, NaCl has maximum concentration and highest osmotic pressure.
How much quick lime can be obtained from 25 gm of CaCO₃ ?
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