Upon heating with Cu2S, the reagent(s) that give copper metal is/are
Answer
B
C
D
2
In a galvanic cell, the salt bridge
Answer
A
C
3
A compound H2X with molar weight of 80g is dissolved in a solvent having density of 0.4 gml–1 . Assuming no change in volume upon dissolution, the molality of a 3.2 molar solution is
Answer
8
4
MX2 dissociates in M2+ and X- ions in an aqueous solution, with a degree of dissociation ($$\alpha$$) of 0.5. The
ratio of the observed depression of freezing point of the aqueous solution to the value of the depression of
freezing point in the absence of ionic dissociation is
Answer
2
5
A list of species having the formula XZ4 is given below.
XeF4, SF4 ,SiF4, $$BF_4^-$$, $$BrF_4^-$$, [Cu(NH3)4]2+, [FeCl4]2-, [CoCl4]2- and [PtCl4]2-
Defining shape on the basis of the location of X and Z atoms, the total number of species having a square
planar shape is
Answer
4
6
In an atom, the total number of electrons having quantum numbers n = 4, |ml| = 1 and ms = –1/2 is
Answer
6
7
If the value of Avogadro number is 6.023 $$\times$$ 1023 mol-1 and the value of Boltzmann constant is 1.380 $$\times$$ 10-23 J K-1, then the number of significant digits in the calculated value of the universal gas constant is
the correct statement(s) in the balanced equation is/are
Answer
A
B
D
9
The pair(s) of reagents that yield paramagnetic species is/are
Answer
A
B
C
10
In the reaction shown below, the major product(s) formed is/are
Answer
(A)
11
Hydrogen bonding plays a central role in the following phenomena
Answer
A
B
C
D
12
The reactivity of compound Z with different halogens under appropriate conditions is given below
The observed pattern of electrophilic substitution can be explained by
Answer
A
B
C
13
The correct combination of names for isomeric alcohols with molecular formula C4H10O is/are
Answer
A
C
D
14
An ideal gas in thermally insulated vessel at internal pressure = p1, volume = V1 and absolute temperature = T1 expands irreversibly against zero external pressure, as shown in the diagram.
The final internal pressure, volume and absolute temperature of the gas are p2, V2 and T2, respectively. For this expansion
Answer
A
B
C
15
The correct statement(s) for orthoboric acid is/are
Answer
B
D
16
The total number of distinct naturally occurring amino acids obtained by complete acidic hydrolysis of the peptide shown below is
Answer
1
17
Consider the following list of reagents, acidified K2Cr2O7, alkaline KMnO4, CuSO4, H2O2, Cl2, O3, FeCl3, HNO3 and Na2S2O3. The total number of reagents that can oxidise aqueous iodide to iodine is
Answer
7
18
The total number(s) of stable conformers with non-zero dipole moment for the following compound is(are)
Answer
3
19
Among PbS, CuS, HgS, MnS, Ag2S, NiS, CoS, Bi2S3 and SnS2 the total number of black coloured sulphides is
Answer
6
20
Consider all possible isomeric ketones including stereoisomers of MW = 100. All these isomers are independently reacted with NaBH4 (Note : stereoisomers are also reacted separately). The total number of ketones that give a racemic product(s) is/are
