Which of the following represents the smallest quantity?
1230g
1.230 × 10-4 g
1.230 × 10-6 kg
1.230 × 104 µg
Which one of the following represents the correct ratio of the energy of electron in ground state of H atom to that of the electron in the first excited state of Li+?
4 : 9
9 : 4
1 : 4
4 : 1
A.
4 : 9
If the equilibrium constant for reaction (i) is 2, what is the equilibrium constant for reaction (ii)?
CO2 CO +
2CO2 + O2 2CO2 ...(ii)
1/4
1/2
1
2
Which of the following comments about the following equilibrium reaction is the most correct?
The equilibriumlies mostly to the right
The equilibrium lies mostly to the left
The equilibrium is exactly in between where the concentration of each of the reactants is exactly equal to the concentration of each of the products
The equilibrium depends on the temperature of the equilibrium reaction
Which of the following represents the correct pH of a 10-7 M HCl in doubly distilled air-free water?
6.6990
7.0000
7.3010
6.3980
Silver metal is recovered industrially by using the chemistry shown below. Which of the following statements is/are not true?
2K[Ag(CN)2] +Zn→ K2[Zn(CN)4] + 2Ag
only Ag has been oxidised and Zn reduced
(a), (c), (d)
Both Ag and Zn have been oxidised
Both Ag and Zn have been reduced
An alkyl bromide is formed as the major product on reaction of 3-methyl-2-butene with hydrobromic acid under thermodynamic conditions. Which of the following is the correct IUPAC name of this product?
2-bromo-3-methylbutane
1-bromo-3-methylbutane
2-bromo-2-methylbutane
1-bromo-3-methyl-2-butene
Which of the following represents the correct increasing order of electron pair availability on nitrogen based on hyperconjugation and + I and-I effects arising from alkyl groups?
iv < iii < ii< i
iv <i <iii< ii
i< ii< iii< iv
i<iv <iii < ii
Which one of the following represents the major product of the reaction of benzene with 2, 2-dimethylpropyl chloride in presence of anhydrous aluminium chloride?
2, 2-dimethylpropylbenzene
1, 1-dimethylpropylbenzene
1, 2-dimethylpropylbenzene
1, 2-dimethyl-1-propenylbenzene