The compound(s) formed upon combustion of sodium metal in excess air is (are)
Answer
A
B
2
Given that the abundances of isotopes 54Fe, 56Fe and 57Fe are 5%, 90% and 5%, respectively, the atomic mass of Fe is :
Answer
(B)
55.95
3
The term that corrects for the attractive forces present in a real gas in the van der Waals equation is
Answer
(B)
$${{a{n^2}} \over {{V^2}}}$$
4
Among the electrolytes Na$$_2$$SO$$_4$$, CaCl$$_2$$, Al$$_2$$(SO$$_4$$)$$_3$$ and NH$$_4$$Cl, the most effective coagulating agent for Sb$$_2$$S$$_3$$ sol is
Answer
(C)
Al$$_2$$(SO$$_4$$)$$_3$$
5
The Henry's law constant for the solubility of N$$_2$$ gas in water at 298 K is 1.0 $$\times$$ 10$$^5$$ atm. The mole fraction of N$$_2$$ in air is 0.8. The number of moles of N$$_2$$ from air dissolved in 10 moles of water at 298 K and 5 atm pressure is
Answer
(A)
4.0 $$\times$$ 10$$^{-4}$$
6
The reaction of P$$_4$$ with X leads selectively to P$$_4$$O$$_6$$. The X is
Answer
(B)
A mixture of O$$_2$$ and N$$_2$$.
7
The correct acidity order of the following is
Answer
(A)
(III) > (IV) > (II) > (I)
8
Among cellulose, poly(vinyl chloride), nylon and natural rubber, the polymer in which the intermolecular force of attraction is weakest is
Answer
(D)
Natural Rubber
9
The IUPAC name of the following compound is
Answer
(B)
2-Bromo-5-hydroxybenzonitrile
10
The correct statement(s) regarding defects in solids is (are)
Answer
B
C
11
The compound(s) that exhibit(s) geometrical isomerism is(are)
Answer
C
D
12
The correct statement(s) about the compound $$\mathrm{H_3C(HO)HC-CH=CH-CH(OH)CH_3~~(X)}$$ is (are)
Answer
A
D
13
The compound X is
Answer
(D)
Na$$_2$$S
14
The compound Y is
Answer
(C)
FeCl$$_3$$
15
The compound Z is
Answer
(B)
$$Fe[Fe{(CN)_6}]$$
16
The structure of the carbonyl compound P is
Answer
(B)
17
The structures of the products Q and R, respectively, are
Answer
(A)
18
The structure of the product S is
Answer
(B)
19
Match each of the diatomic molecules in Column I with its property/properties in Column II:
